Precision Lead Screws

Comprehensive catalog of lead screws and applications.

PBC Linear maintains a commitment to bring improved linear motion solutions to market. Since 1983, its goal has been to provide innovative solutions through the development and manufacturing of linear motion components, mechanical sub-assemblies, and customized systems to meet customers’ application and product needs and specifications.

The diverse staff of engineers at PBC Linear combine in-depth industry knowledge and decades of experience with a collaborative approach to meet the linear motion requirements of each application.

Global Footprint

Headquartered with their main manufacturing facilities in the USA, PBC Linear also has locations in Europe, and SINO Asia, situated to support your production needs globally.

Manufacturing Agility

Headquartered in Roscoe, Illinois, USA, PBC Linear production is maximized to produce unmatched quality and designed specifically for the most complex and meticulous applications resulting in ready to install solutions.

This allows PBC Linear to provide quiet, smooth, and reliable linear motion in a wide array of applications, ranging from very small pick-and-place assemblies and scanners used in lab automation, to heavy-duty lift systems used in industrial manufacturing.

Core Competencies

Simplicity linear plain bearings from PBC Linear are self-lubricating and excel where ball bearings fail.

Simplicity Plain Bearings Bonding of Polymer and Fluoropolymer to Metals

Developed and refined over 26 years, linear plain bearings excel where traditional ball bearings fail.

Anti-backlash lead screw nuts from PBC Linear provide greater consistency in performance and life.

Anti-Backlash Lead Screw Nut

Constant Force Technology is a leap forward in nut design for lead screws. The result is greater consistency in performance and life, with great resistance to backlash.

The Simultaneous Integral Milling Operation (SIMO) from PBC Linear produces highly accurate rail lengths.

Highly accurate rail lengthswith SIMO® process

The Simultaneous Integral Milling Operation (SIMO) qualifies the rail to tolerances that have 6x less bow, 2x less twist, and 2x better flatness.

Integral-V linear guides from PBC Linear have durable and lightweight anodized aluminum profiles embedded with hardened steel raceways.

Joined aluminum and steel for longer rails

Integral-V rails and Redi-Rails® are produced by mechanically embedding hardened steel race ways onto an anodized aluminum profile. Precise, durable, and lightweight.

Configure PBC Linear parts and download CAD files. PBC Linear offers lead screws in inch and metric sizes with and without NEMA motors. Metric ball screws from PBC Linear have cylindrical and flanged nuts with and without NEMA motors. Ball bearings, self-lubricating bearings, linear shafting, and pillow blocks from PBC Linear. Roller Pillow Blocks from PBC Linear are ideal for heavy loads and uneven shafting. Cam Roller Technology linear guides from PBC Linear excel in high load and heavy duty applications. Gliding Surface Technology linear guides from PBC Linear are self-lubricating and ideal for contaminated environments. Integral-V linear guides from PBC Linear come in a variety of profiles and are a low cost alternative to profile rails. PBC Linear combines our linear guide technology with NEMA motors and motor mounts to create linear actuators.
Lead Screw Ball Screw Simplicity
Bearings		 Roller
Pillow Block		 Cam Roller Glide Surface Integral-V Mechatronics
Systems
Inexpensive ● ● ● ● ● ● ● ●
Low Maintenance ● ● ● ● ● ●
Compact Size ● ● ● ●
Low Noise ● ● ●
Multiple Configurations ● ● ● ● ● ● ● ●
Washdown Applications ● ● ● ●
Custom Design Support ● ● ● ● ● ● ● ●
Moderate to High Speed ● ● ● ● ● ● ● ●
Vacuum & Cleanroom Applications ● ●** ● ● ●
Food Processing ● ●** ● ● ●
Ease of Installation ● ● ● ● ●

** Only with special lubricants

Building a Better Lead Screw Assembly

PBC Linear lead screws utilize world class precision German roll threading to ensure the highlight level of lead accuracy.

World Class Precision German Roll Threading

To ensure the highest level of lead accuracy, key process variables such as speed, skew, temperature, and coolant flow are precisely monitored. CNC controlled machinery provides precision process adjustment and control.

Automated in-feed and out-feed provide consistency over the full length of the screw stock.

PBC Linear monitors the speed, skew, temperature, and coolant flow of the lead screw manufacturing process to provide high accuracy lead screws.

Quality Inspections

Microscopic inspections of the surface finish occurs at each stage of the manufacturing and coating process.

PBC Linear ball screws receive microscopic inspections of the surface finish at each stage of the manufacturing process.

CNC Straightening

The only automated straightening process in the USA, yielding the highest straightness tolerances available in a lead screw. Smoother finish makes for longer product life. This process eliminates errors that are inherent to manual processes. Minimizes runout which can cause vibration, noise, and premature wear.

PBC Linear has the only automated lead screw straightening process in the USA.

Superior Lead Accuracy

PBC Linear inspects 100% of the screw length (Up to 20,000 points over 72" compared to the competitors data point every 6 inches over the same length). Lead accuracy of 0.003"/ft. (76 μm/300 mm), 3 times better than typical industry specifications.

Lead Screws from PBC Linear have 3 times better lead accuracy than industry standards.

Climate Controlled, In-House Coating

Developed in-house, this custom coating process and equipment increases the quality of finish and eliminates screw flaking. Coating reduces coefficient of friction, increasing screw efficiency and extending life. Each screw is inspected with a digital microscope to ensure there is no flaking or pitting in the coating surface.

PBC Linear developed a custom lead screw coating process to eliminate screw flaking.

Pairing a Quality Screw with an Innovative Anti-Backlash Nut

Constant Force Technology nut utilizes a spring that applies uniform radial pressure to the nut at all stages of the motion profile

Available in various geometries for quick customization.

CFT Nut Advantages:

  • Greater than 2 times superior backlash compensation
    (Confirmed by leading lab automation customer validation testing)
  • Consistent preload over life
    (Key for system level tuning and consistent performance over life)
  • 2–4 times better than traditional designs, as validated
  • Self lubricated
    (Special PTFE nut formulation developed from 30 plus years of plain bearing knowledge)
Constant Force Technology lead screw nuts from PBC Linear provide greater than 2 times superior backlash compensation.

Motors Built for Linear Motion

Lead screws are precision mounted and matched to a hollow shaft motor. The hollow shaft concentricity minimizes runout less than 0.003" (75 μm).

  • Larger bearings increase thrust capacity and add longer life
  • Preload on bearings removes axial play, reducing system backlash
  • Optional smart motors
Lead screws from PBC Linear are mounted to NEMA motors.

Quality Testing

Two dedicated test labs are used to establish high performance characteristics. One is designed for load and life where assemblies have run in excess of 2,500 miles without failure, and one is sound-proofed to analyze noise levels.

PBC Linear dedicates two test labs for lead screw life and load testing.

Thread Terminology

Terms such as pitch diameter, lead angle, lead accuracy, crests, roots, flanks, pitch, and lead are used to describe lead screws from PBC Linear.
A two start lead screws have double the pitch than the equivalent single start thread | PBC Linear.
A four start lead screws have double the pitch than the equivalent single start thread | PBC Linear.

Thread Terminology

Pitch Diameter is the diameter of a theoretical cylinder that passes through the threads in such a way that the distance between the thread crests and thread roots is equal. In an ideal product, these widths would each equal one-half of the thread pitch.

Lead Angle is the angle made by the pitch helix, with a plane perpendicular to the axis.

Lead Accuracy Lead accuracy is the difference between the actual distance traveled verses the theoretical distance traveled based on lead.

Crests are the top of the threads.

Roots are the bottom of the threads.

Flanks are the surfaces between the crests and roots.

Pitch is the distance measured parallel to the thread axis, between corresponding points on adjacent threads.

Lead is the axial distance the nut advances in one revolution of the screw. The lead is equal to the pitch times the number of starts. Pitch • starts = lead

Flank Angle is the angle between a flank and the perpendicular thread axis. Flank angles are sometimes termed “half-angle” of the thread, but this is only true when neighboring flanks have identical angles (when the threads are symmetrical).

Actual Pitch Diameteris determined by subtracting the pin diameter times 2 from the measurement taken across the three thread wires.

Internal Thread is the minor diameter occurs at the crests while the major diameter occurs at the roots.

External Thread is the minor diameter occurs at the roots while the major diameter occurs at the crests.

Lead Screws & Nuts

Lead screws in inch and metric sizes are available from PBC Linear.
Metric Sizes Inch Sizes
6mm 10mm 12mm 16mm 3/16" 1/4" 3/8" 7/16" 1/2"
Leads
1 mm ● ● ● ●
2 mm ● ● ● ●
4 mm ● ● ● ●
5 mm ● ● ● ●
6 mm ● ● ● ●
8 mm ● ● ● ●
10 mm ● ● ● ●
12 mm ● ● ● ●
16 mm ● ● ●
25 mm ● ● ●
0.05″ ●
0.10″ ●
0.20″ ●
0.25″ ●
0.333″ ●
0.50″ ●
1.00″ ●

Leadscrew / Nut % Efficiency
Metric Screw Diameters

6mm 10mm 12mm 16mm
1 mm Coated 39 28 24 19
1 mm Uncoated 30 21 18 14
2 mm Coated 60 45 40 33
2 mm Uncoated 51 36 31 25
4 mm Coated 71 61 56 49
4 mm Uncoated 62 52 47 40
5 mm Coated 76 66 62 55
5 mm Uncoated 68 57 53 45
6 mm Coated 77 69 65 58
6 mm Uncoated 70 61 56 49
8 mm Coated 81 74 71 65
8 mm Uncoated 75 66 62 56
10 mm Coated 84 78 75 69
10 mm Uncoated 78 71 67 61
12 mm Coated 84 80 77 72
12 mm Uncoated 81 74 70 64
16 mm Coated – 84 81 77
16 mm Uncoated – 78 75 70
25 mm Coated – 86 85 83
25 mm Uncoated – 83 81 77

The listed efficiencies are theoretical values calculated by assuming the coefficients of friction.

Leadscrew / Nut % Efficiency
Inch Screw Diameters

3/16" 1/4" 3/8" 7/16" 1/2"
0.05″ Coated 51 – – – –
0.05″ Uncoated 41 – – – –
0.10″ Coated – – – – 44
0.10″ Uncoated – – – – 35
0.20″ Coated – – 66 – –
0.20″ Uncoated – – 57 – –
0.25″ Coated – – – – 65
0.25″ Uncoated – – – 56
0.333″ Coated – 82 – – –
0.333″ Uncoated – 76 – – –
0.50″ Coated 88 – – – –
0.50″ Uncoated 84 – – – –
1.00″ Coated – – – 87 –
1.00″ Uncoated – – – 82 –

Lead Accuracy: 76.2 micron/300 mm or 0.003"/ft

Diameter: 6 mm–16 mm or 3/16"–1/2"

Lead: 1 mm–25 mm or 0.05"–0.25"

Dynamic Load: Up to 1.16 kN or 260 lbs.

Backlash:

  • Constant Force Nuts are designed to reduce or eliminate backlash. Generally, the higher the preload, the better the anti-backlash performance. Custom designs available
  • Standard Nut, 0.025–0.25 mm (0.001–0.010") Longer leads have greater backlash

Part Number Configurator

Type Thread
Dir.		 Diameter
and Lead		 Coating Screw Length Nut Left End Right End Special
LS R 0000 T - 0250.00 - RS - 111 - AFN - E

Type

LS - Lead Screw

Thread Direction

R - Right

L - Left

Diameter and Lead

Lead is the axial distance the nut advances in one revolution of the screw. The lead is equal to the pitch times the number of starts. Pitch • starts = lead

Inch Thread Code
Lead 3/16" 1/4" 3/8" 7/16" 1/2"
0.05" 18005
0.10" 50010
0.20" 37020
0.25" 50025
0.333" 25033
0.50" 18050
1.00" 43100
Metric Thread Code
Lead 6 mm 10 mm 12 mm 16 mm
1 mm 0601 1001 1201 1601
2 mm 0602 1002 1202 1602
4 mm 0604 1004 1204 1604
5 mm 0605 1005 1205 1605
6 mm 0606 1006 1206 1606
8 mm 0608 1008 1208 1608
10 mm 0610 1010 1210 1610
12 mm 0612 1012 1212 1612
16 mm 1016 1216 1616
25 mm 1025 1225 1625

Coating

T - PTFE

U - Uncoated

Screw Length

Inch - 0000.00

Metric - 0000

Note: Screw type selected determines if length is inch or metric.

Nut

Lead Screw Standard Nuts

RS - Round

TS - Triangle

US - Threaded

VS - Rectangle

Lead Screw Anti-Backlash Nuts

RCF - Round

TCF - Triangle

UCF - Threaded

VCF - Rectangle

Left End Journal

Left End Only
Code Description
080 NEMA 8 (16 mm)
(Requires a 3/16", 1/4" or 6 mm screw)
Note: Not available with encoder ready option.
111 NEMA 11 (23 mm)
(Requires a 3/16", 1/4" or 6 mm screw)
140 NEMA 14 (31 mm)
(Requires a 3/16", 1/4", 6 mm or 10 mm screw)
171 NEMA 17 (43 mm), Single Stack
(Requires a 1/4", 3/8", 6 mm, 10 mm or 12 mm screw)
172 NEMA 17 (43 mm), Double Stack
(Requires a 3/8", 10 mm or 12 mm screw)
231 NEMA 23 (56 mm), Single Stack
(Requires a 3/8", 7/16" 1/2" 10 mm, 12 mm or 16 mm screw)
232 NEMA 23 (56 mm), Double Stack
(Requires a 3/8", 7/16" 1/2" 10 mm, 12 mm or 16 mm screw)
23P NEMA 23 (56 mm), Power Plus
(Requires a 3/8", 7/16" 1/2" 10 mm, 12 mm or 16 mm screw)
Left and/or Right End
Code Description
AFN Float Journal
ALN Fixed Journal
BFN Float Journal with Drive End
BLN Fixed Journal with Drive End
CFN Float Journal with Keyway*
CLN Fixed Journal with Keyway*
AFB Float Journal with Bearing Block
ALB Fixed Journal with Bearing Block
BFB Float Journal with Bearing Block
BLB Fixed Journal with Bearing Block
CFB Float Journal with Keyway, with Bearing Block*
CLB Fixed Journal with Keyway, with Bearing Block*
THR Threaded
NNN None

Right End Journal

Left and/or Right End
Code Description
AFN Float Journal
ALN Fixed Journal
BFN Float Journal with Drive End
BLN Fixed Journal with Drive End
CFN Float Journal with Keyway*
CLN Fixed Journal with Keyway*
AFB Float Journal with Bearing Block
ALB Fixed Journal with Bearing Block
BFB Float Journal with Bearing Block
BLB Fixed Journal with Bearing Block
CFB Float Journal with Keyway, with Bearing Block*
CLB Fixed Journal with Keyway, with Bearing Block*
THR Threaded
NNN None

Special

E - Encoder Ready

N - No Option

Lead Screw Configuration Factors

Sizing a Lead Screw and Stepper Motor

The theoretical torque required to drive a load with a lead screw is:


\( \large\boldsymbol{\text{Torque}_{\text{Drive}} = \frac{\text{Load } \cdot\text{ Lead}}{2\pi \text{ } \cdot \text{ Screw Efficiency}}} \)

To properly use the above formula, a customer first needs to estimate the total axial load that must be driven by the lead screw system. The estimated total load should include all mass loads, acceleration loads, system friction loads, and the nut drag load. Friction loads of an actuator or a bearing and rail system must be accounted for – especially if plane bearings or bushings are used. See nut detail pages for their drag load specifications.

Next, a customer can make a table of the estimated total loads at the important speeds of the application and use the above formula to calculate the estimated theoretical motor torque for each combination of lead screw diameter and lead of interest.

Having estimated the required motor torques and knowing the speeds of the application, a customer can check the motor torque-speed curves to determine what stepper motor should be used. Note that it is common practice to ensure that a stepper motor can produce 1.5 - 2.0 times the torque required at all the speeds of an application. The multiplier of 1.5 - 2.0 helps compensate for variations in motor torque, friction, small misalignments, cable carrier drag, and other factors not generally accounted for in estimates of total load.

Backdriving of a Lead Screw

If the efficiency of a lead screw and nut is high enough, the lead screw can back-drive when an axial thrust force is applied to the nut. Generally, back-driving will not occur if the screw lead is less than 1/3 the diameter of an uncoated lead screw or 1/4 the diameter of a coated lead screw. Application of lubricant to a lead screw can lower the coefficient of friction of the lead screw & nut system and cause the ability to back-drive. A screw & nut system that experiences vibration will back-drive at a lower efficiency than a similar screw & nut system that does not experience vibration.

The theoretical brake torque required to hold a load is:


\( \large\boldsymbol{\text{Torque}_{\text{Holding}} = \frac{\text{Load } \cdot\text{ Lead } \cdot \text{ Screw Efficiency}}{2\pi}} \)

Other System Factors

Customers should also check that the lead screw's 80% critical speed limit, the maximum compressive column loading of the lead screw, and the PV derated nut load capacity are not exceeded per the charts on the following pages. Standard operating temperature range is 32°–180°F (0–82°C).

If a customer has questions, Application Engineers at PBC Linear can be contacted for assistance.

Lead screw's load force and friction act opposite from the direction of motion | PBC Linear.

Lead Screw Speed & Load Charts

PBC Linear screw selector application

Screw Selector Application

Visit our Screw Selector Application to view Critical Speed, Column Loading, and Pressure / Velocity Charts that fit your requirements.

Screw Selector

Lead Nuts

Standard Triangular Nut

Standard Triangle Lead Screw Nut | PBC Linear.
Metric Screws - Standard Triangle Nut
Screw Diameter
A		 Nut Dia.
B (mm)		 Nut Length
C (mm)		 Flange Dia.
D (mm)		 Flange Thickness
E (mm)		 Mounting Hole Dia.
F (mm)		 Bold Circle Dia.
G (mm)		 Drag Torque
(Nm)		 Dynamic Load
(N)
6 mm 10.2 22.2 25.4 4.8 3.6 19.1 Free Wheeling 334 N
10 mm 15.9 25.4 38.1 4.8 5.1 28.6 Free Wheeling 445 N
12 mm 16.9 38.1 44.5 6.4 5.6 35.7 Free Wheeling 778 N
16 mm 20.3 38.1 54 6.4 5.6 44.5 Free Wheeling 1160 N
Inch Screws - Standard Triangle Nut
Screw Diameter
A		 Nut Dia.
B (in)		 Nut Length
C (in)		 Flange Dia.
D (in)		 Flange Thickness
E (in)		 Mounting Hole Dia.
F (in)		 Bold Circle Dia.
G (in)		 Drag Torque
(oz-in)		 Dynamic Load
(lb)
3/16″ 0.35 0.63 0.81 0.13 0.12 0.6 Free Wheeling 45
1/4″ 0.41 0.88 1 0.19 0.14 0.75 Free Wheeling 75
3/8″ 0.61 1 1.5 0.19 0.2 1.125 Free Wheeling 85
7/16″ 0.64 1.5 1.62 0.2 0.2 1.25 Free Wheeling 125
1/2″ 0.69 1.5 1.75 0.22 0.22 1.406 Free Wheeling 200

Constant Force Triangular Nut

Constant Force Triangle Lead Screw Nut | PBC Linear.
Metric Screws - Constant Force Triangle Nut
Screw Diameter
A		 Nut Dia.
B (mm)		 Nut Length
C (mm)		 Flange Dia.
D (mm)		 Flange Thickness
E (mm)		 Mounting Hole Dia.
F (mm)		 Bold Circle Dia.
G (mm)		 Drag Torque
(Nm)		 Dynamic Load
(N)
6 mm 10.2 22.2 25.4 4.8 3.6 19.1 0.0134–0.0164 302
10 mm 15.9 25.4 38.1 4.8 5.1 28.6 0.0197–0.0240 400
12 mm 16.9 38.1 44.5 6.4 5.6 35.7 0.0211–0.0264 703
16 mm 20.3 38.1 54 6.4 5.6 44.5 0.0250–0.0310 1040
Inch Screws - Constant Force Triangle Nut
Screw Diameter
A		 Nut Dia.
B (in)		 Nut Length
C (in)		 Flange Dia.
D (in)		 Flange Thickness
E (in)		 Mounting Hole Dia.
F (in)		 Bold Circle Dia.
G (in)		 Drag Torque
(oz-in)		 Dynamic Load
(lb)
3/16″ 0.35 0.63 0.81 0.13 0.12 0.6 1.45–1.88 41
1/4″ 0.41 0.88 1 0.19 0.14 0.75 2.37–2.90 68
3/8″ 0.61 1 1.5 0.19 0.2 1.125 3.00–3.84 77
7/16″ 0.64 1.5 1.62 0.22 0.2 1.25 3.60–4.40 112
1/2″ 0.69 1.5 1.75 0.25 0.22 1.406 4.00–5.00 180

Standard Round Nut

Standard Round Lead Screw Nut | PBC Linear.
Metric Screws - Standard Round Nut
Screw Diameter
A		 Nut Dia.
B (mm)		 Nut Length
C (mm)		 Flange Dia.
D (mm)		 Flange Thickness
E (mm)		 Mounting Hole Dia.
F (mm)		 Bold Circle Dia.
G (mm)		 Drag Torque
(Nm)		 Dynamic Load
(N)
6 mm 10.2 22.2 25.4 4.8 3.6 19.1 Free Wheeling 334 N
10 mm 15.9 25.4 38.1 4.8 5.1 28.6 Free Wheeling 445 N
12 mm 16.9 38.1 44.5 6.4 5.6 35.7 Free Wheeling 778 N
16 mm 20.3 38.1 54 6.4 5.6 44.5 Free Wheeling 1160 N
Inch Screws - Standard Round Nut
Screw Diameter
A		 Nut Dia.
B (in)		 Nut Length
C (in)		 Flange Dia.
D (in)		 Flange Thickness
E (in)		 Mounting Hole Dia.
F (in)		 Bold Circle Dia.
G (in)		 Drag Torque
(oz-in)		 Dynamic Load
(lb)
3/16″ 0.35 0.63 0.81 0.13 0.12 0.6 Free Wheeling 45
1/4″ 0.41 0.88 1 0.19 0.14 0.75 Free Wheeling 75
3/8″ 0.61 1 1.5 0.19 0.2 1.125 Free Wheeling 85
7/16″ 0.64 1.5 1.62 0.22 0.2 1.25 Free Wheeling 125
1/2″ 0.69 1.5 1.75 0.25 0.22 1.406 Free Wheeling 200

Constant Force Round Nut

Constant Force Round Lead Screw Nut | PBC Linear.
Metric Screws - Constant Force Round Nut
Screw Diameter
A		 Nut Dia.
B (mm)		 Nut Length
C (mm)		 Flange Dia.
D (mm)		 Flange Thickness
E (mm)		 Mounting Hole Dia.
F (mm)		 Bold Circle Dia.
G (mm)		 Drag Torque
(Nm)		 Dynamic Load
(N)
6 mm 10.2 22.2 25.4 4.8 3.6 19.1 0.0134–0.0164 302 N
10 mm 15.9 38.1 38.1 4.8 5.1 28.6 0.0197–0.0240 400 N
12 mm 16.9 44.5 44.5 6.4 5.6 35.7 0.0211–0.0264 703 N
16 mm 20.3 49.5 54 6.4 5.6 44.5 0.0250–0.0310 1040 N
Inch Screws - Constant Force Round Nut
Screw Diameter
A		 Nut Dia.
B (in)		 Nut Length
C (in)		 Flange Dia.
D (in)		 Flange Thickness
E (in)		 Mounting Hole Dia.
F (in)		 Bold Circle Dia.
G (in)		 Drag Torque
(oz-in)		 Dynamic Load
(lb)
3/16″ 0.35 0.88 0.81 0.13 0.12 0.6 1.45–1.88 41
1/4″ 0.41 0.88 1 0.19 0.14 0.75 2.37–2.90 68
3/8″ 0.61 1.5 1.5 0.19 0.2 1.125 3.00–3.84 77
7/16″ 0.64 1.62 1.62 0.22 0.2 1.25 3.60–4.40 112
1/2″ 0.69 1.75 1.75 0.25 0.22 1.406 4.00–5.00 180

Standard Threaded Nut

Standard Threaded Lead Screw Nut | PBC Linear.
Metric Screws - Standard Threaded Nut
Screw Diameter
A		 Nut Dia.
B (mm)		 Nut Length
C (mm)		 Flange Dia.
D (mm)		 Flange Thickness
E (mm)		 Thread
F		 Thread Length
G (mm)		 End Length
H (mm)		 Drag Torque
(Nm)		 Dynamic Load
(N)
6 mm 10.2 22.2 20.3 3.2 M14x1.5 4.8 6.3 Free Wheeling 334 N
10 mm 15.9 25.4 25.4 3.2 M18x1.5 6.4 7.6 Free Wheeling 445 N
12 mm 16.9 38.1 31.8 3.2 M24x2 9.5 10.8 Free Wheeling 778 N
16 mm 20.3 38.1 31.8 3.2 M24x2 9.5 10.8 Free Wheeling 1160 N
Inch Screws - Standard Threaded Nut
Screw Diameter
A		 Nut Dia.
B (in)		 Nut Length
C (in)		 Flange Dia.
D (in)		 Flange Thickness
E (in)		 Thread
F		 Thread Length
G (in)		 End Length
H (in)		 Drag Torque
(oz-in)		 Dynamic Load
(lb)
3/16″ 0.35 0.88 0.6 0.13 1/2"-20 0.19 0.247 Free Wheeling 45
1/4″ 0.41 0.88 0.8 0.13 9/16"-18 0.19 0.247 Free Wheeling 75
3/8″ 0.61 1 1 0.13 5/8"-18 0.25 0.3 Free Wheeling 85
7/16″ 0.64 1.5 1.25 0.13 13/16"-16 0.375 0.425 Free Wheeling 125
1/2″ 0.69 1.5 1.25 0.13 15/16"-16 0.375 0.425 Free Wheeling 200

Constant Force Threaded Nut

Constant Force Threaded Lead Screw Nut | PBC Linear.
Metric Screws - Constant Force Threaded Nut
Screw Diameter
A		 Nut Dia.
B (mm)		 Nut Length
C (mm)		 Flange Dia.
D (mm)		 Flange Thickness
E (mm)		 Thread
F		 Thread Length
G (mm)		 End Length
H (mm)		 Drag Torque
(Nm)		 Dynamic Load
(N)
6 mm 10.2 27.5 20.3 3.175 M14x1.5 4.8 6.3 0.0134–0.0164 302 N
10 mm 15.9 44.5 25.4 3.175 M18x1.5 6.4 7.6 0.0197–0.0240 400 N
12 mm 16.9 44.5 31.8 3.175 M24X2 9.5 10.8 0.0211–0.0264 703 N
16 mm 20.3 49.5 31.8 3.175 M24x2 9.5 10.8 0.0250–0.0310 1040 N
Inch Screws - Constant Force Threaded Nut
Screw Diameter
A		 Nut Dia.
B (in)		 Nut Length
C (in)		 Flange Dia.
D (in)		 Flange Thickness
E (in)		 Thread
F		 Thread Length
G (in)		 End Length
H (in)		 Drag Torque
(oz-in)		 Dynamic Load
(lb)
3/16″ 0.35 1.08 0.6 0.13 1/2"-20 0.19 0.247 1.45–1.88 41
1/4″ 0.41 1.08 0.8 0.13 9/16"-18 0.19 0.247 2.37–2.90 68
3/8″ 0.61 1.75 1 0.13 5/8"-18 0.25 0.3 3.00–3.84 77
7/16″ 0.64 1.75 1.25 0.13 13/16"-16 0.375 0.425 3.60–4.40 112
1/2″ 0.69 1.95 1.25 0.13 15/16"-16 0.375 0.425 4.00–5.00 180

Standard Rectangle Nut

Standard Rectangle Lead Screw Nut | PBC Linear.
Metric Screws - Standard Rectangle Nut
Screw Diameter
A		 Nut Dia.
B (mm)		 Nut Length
C (mm)		 Flange Dia.
D (mm)		 Flange Thickness
E (mm)		 Drag Torque
(Nm)		 Dynamic Load
(N)
6 mm 10.2 22.2 17.8 3.4 Free Wheeling 334 N
10 mm 15.9 25.4 22 5.1 Free Wheeling 445 N
12 mm 19.1 38.1 30.5 5.1 Free Wheeling 778 N
16 mm 20.3 38.1 38.1 5.1 Free Wheeling 1160 N
Inch Screws - Standard Rectangle Nut
Screw Diameter
A		 Nut Dia.
B (in)		 Nut Length
C (in)		 Flange Dia.
D (in)		 Flange Thickness
E (in)		 Drag Torque
(oz-in)		 Dynamic Load
(lb)
3/16″ 0.35 0.63 0.62 0.09 Free Wheeling 45
1/4″ 0.41 0.88 0.7 0.14 Free Wheeling 75
3/8″ 0.61 1 0.87 0.2 Free Wheeling 85
7/16″ 0.64 1.3 1.2 0.2 Free Wheeling 125
1/2″ 0.69 1.5 1.2 0.2 Free Wheeling 200

Constand Force Rectangle Nut

Constant Force Rectangle Lead Screw Nut | PBC Linear.
Metric Screws - Constant Force Rectangle Nut
Screw Diameter
A		 Nut Dia.
B (mm)		 Nut Length
C (mm)		 Flange Dia.
D (mm)		 Flange Thickness
E (mm)		 Drag Torque
(Nm)		 Dynamic Load
(N)
6 mm 10.2 22.2 17.8 3.4 0.0134–0.0164 302 N
10 mm 15.9 38.1 22 5.1 0.0197–0.0240 400 N
12 mm 19.1 41.3 30.5 5.1 0.0211–0.0264 703 N
16 mm 20.3 49.5 38.1 5.1 0.0250–0.0310 1040 N
Inch Screws - Constant Force Rectangle Nut
Screw Diameter
A		 Nut Dia.
B (in)		 Nut Length
C (in)		 Flange Dia.
D (in)		 Flange Thickness
E (in)		 Drag Torque
(oz-in)		 Dynamic Load
(lb)
3/16″ 0.35 0.88 0.62 0.09 1.45–1.88 41
1/4″ 0.41 0.88 0.7 0.14 2.37–2.90 68
3/8″ 0.61 1.5 0.87 0.2 3.00–3.84 77
7/16″ 0.64 1.63 1.2 0.2 3.60–4.40 112
1/2″ 0.69 1.75 1.2 0.2 4.00–5.00 180

Machined Journals

Floating & Threaded Journal Ends

Floating & Threaded Journal Lead Screw Ends | PBC Linear
Metric Screws
Screw Diameter
A		 B C
Float Threaded Float Threaded
6 mm 15.24 mm 20 mm 4.98 mm M5 x 0.80–6g
10 mm 15.75 mm 20 mm 5.97 mm M6 x 1.00–6g
12 mm 20.32 mm 25 mm 9.98 mm M10 x 1.50–6g
16 mm 21.34 mm 25 mm 11.97 mm M12 x 1.75–6g
Inch Screws
Screw Diameter
A		 B C
Float Threaded Float Threaded
3/16″ 0.600" 0.787" 0.157" M4 x 0.70–6g
1/4″ 0.600" 0.787" 0.197" M5 x 0.80–6g
3/8″ 0.600" 0.787" 0.235" M6 x 1.00–6g
7/16″ 0.800" 0.984" 0.393" M10 x 1.50–6g
1/2″ 0.800" 0.984" 0.393" M10 x 1.50–6g

Fixed Journal Ends

Fixed Journal Lead Screw Ends | PBC Linear
Metric Screws
Screw Diameter
A		 B B2 C E
6 mm 22.86 mm 10 mm 4.98 mm M5 x 0.80–6g
10 mm 22.86 mm 9 mm 5.97 mm M6 x 1.00–6g
12 mm 33.27 mm 14.22 mm 9.97 mm M10 x 1.50–6g
16 mm 36.88 mm 15.9 mm 11.97 mm M12 x 1.75–6g
Inch Screws
Screw Diameter
A		 B B2 C E
3/16″ 0.900" 0.315" 0.157" M4 x 0.70–6g
1/4″ 0.900" 0.394" 0.196" M5 x 0.80–6g
3/8″ 0.900" 0.354" 0.235" M6 x 1.00–6g
7/16″ 1.310" 0.560" 0.393" M10 x 1.50–6g
1/2″ 1.310" 0.560" 0.393" M10 x 1.50–6g

Float with Journal Ends 

Float with Journal Lead Screw Ends | PBC Linear
Metric Screws
Screw Diameter
A		 B B2 C D E
6 mm 25.4 mm 15.24 mm 4.98 mm 4 mm 10.16 mm
10 mm 30.86 mm 15.24 mm 5.97 mm 4 mm 15.62 mm
12 mm 36.32 mm 20.32 mm 9.97 mm 8 mm 16 mm
16 mm 37.08 mm 20.7 mm 11.97 mm 10 mm 16.38 mm
Inch Screws
Screw Diameter
A		 B B2 C D E
3/16″ 1.000" 0.600" 0.157" 0.125" 0.400"
1/4″ 1.000" 0.600" 0.197" 0.125" 0.400"
3/8″ 1.215" 0.600" 0.235" 0.188" 0.615"
7/16″ 1.430" 0.800" 0.393" 0.313" 0.630"
1/2″ 1.430" 0.800" 0.393" 0.313" 0.630"

Fixed with Journal Ends 

Fixed with Journal Lead Screw Ends | PBC Linear
Metric Screws
Screw Diameter
A		 B B2 C D E F
6 mm 34.85 mm 10 mm 4.98 mm 4 mm M5 x 0.80–6g 12.37 mm
10 mm 38.1 mm 9 mm 5.97 mm 4 mm M6 x 1.00–6g 15.24 mm
12 mm 48.9 mm 14.22 mm 9.97 mm 8 mm M10 x 1.50–6g 16 mm
16 mm 50.8 mm 15.9 mm 11.97 mm 10 mm M12 x 1.75–6g 16.54 mm
Inch Screws
Screw Diameter
A		 B B2 C D E F
3/16″ 1.372" 0.315" 0.157" 0.125" M4 x 0.70–6g 0.487"
1/4″ 1.372" 0.394" 0.197" 0.125" M5 x 0.80–6g 0.487"
3/8″ 1.500" 0.354" 0.235" 0.188" M6 x 1.00–6g 0.600"
7/16″ 1.926" 0.560" 0.393" 0.313" M10 x 1.50–6g 0.630"
1/2″ 1.926" 0.560" 0.393" 0.313" M10 x 1.50–6g 0.630"

Float Journal with Keyway / Flat

Float Journal with Keyway / Flat Lead Screw Ends | PBC Linear
Metric Screws
Screw Diameter
A		 B B2 C D F G H
6 mm 25.4 mm 15.24 mm 4.98 mm 4 mm 10.16 mm 7.26 mm Flat
10 mm 30.86 mm 15.24 mm 5.97 mm 4 mm 15.62 mm 9.53 mm Flat
12 mm 36.32 mm 20.32 mm 9.97 mm 8 mm 16 mm 12.7 mm 3 mm Keyway
16 mm 37.08 mm 20.7 mm 11.97 mm 10 mm 16.38 mm 12.7 mm 3 mm Keyway
Inch Screws
Screw Diameter
A		 B B2 C D F G H
3/16″ 1.000" 0.600" 0.157" 0.125" 0.400" 0.286" Flat
1/4″ 1.000" 0.600" 0.197" 0.125" 0.400" 0.286" Flat
3/8″ 1.215" 0.600" 0.235" 0.188" 0.615" 0.375" Flat
7/16″ 1.430" 0.800" 0.393" 0.313" 0.630" 0.500" 0.125" Keyway
1/2″ 1.430" 0.800" 0.393" 0.313" 0.630" 0.500" 0.125" Keyway

Fixed Journal with Keyway / Flat

Fixed Journal with Keyway / Flat Lead Screw Ends | PBC Linear
Metric Screws
Screw Diameter
A		 B B2 C D E F G H
6 mm 34.85 mm 10 mm 4.98 mm 4 mm M5 x 0.80–6g 12.37 mm 7.26 mm Flat
10 mm 38.1 mm 9 mm 5.97 mm 4 mm M6 x 1.00–6g 15.24 mm 9.53 mm Flat
12 mm 48.9 mm 14.22 mm 9.97 mm 8 mm M10 x 1.50–6g 16 mm 12.7 mm 3 mm Keyway
16 mm 50.8 mm 15.9 mm 11.97 mm 10 mm M12 x 1.75–6g 16.54 mm 12.7 mm 3 mm Keyway
Inch Screws
Screw Diameter
A		 B B2 C D E F G H
3/16″ 1.372" 0.315" 0.157" 0.125" M4 x 0.70–6g 0.487" 0.286" Flat
1/4″ 1.372" 0.394" 0.197" 0.125" M5 x 0.80–6g 0.487" 0.286" Flat
3/8″ 1.500" 0.354" 0.235 0.188" M6 x 1.00–6g 0.600" 0.375" Flat
7/16″ 1.925" 0.560" 0.393" 0.313" M10 x 1.50–6g 0.630" 0.500" 0.125" Keyway
1/2″ 1.925" 0.560" 0.393" 0.313" M10 x 1.50–6g 0.630" 0.500" 0.125" Keyway

Bearing Blocks

Bearing Blocks

Lead Screw Bearing Blocks | PBC Linear
Metric Screws
For Screw
Diameter		 Fixed P/N A
mm		 B
mm		 C
mm		 D
mm		 E
mm		 F
mm		 G
C'Bore Dia mm		 H*
Internal mm		 I
C'Bore Depth mm
6 mm LSLEB-06 76 43 22 30.25 50 20 14.5 8.8 8
10 mm LSLEB-10 85 56 33 30.25 60 20 14.5 8.8 8
12 mm LSLEB-12 120 70 40 47.25 82.5 25 19.5 13 12
16 mm LSLEB-16 127 83 45 47.25 90 25 19.5 13 12
Inch Screws
For Screw
Diameter		 Fixed P/N A
mm		 B
mm		 C
mm		 D
mm		 E
mm		 F
mm		 G
C'Bore Dia mm		 H*
Internal mm		 I
C'Bore Depth mm
3/16″ LSLEB-05 76 43 22 30.25 50 20 14.5 8.8 8
1/4" LSLEB-06 76 43 22 30.25 50 20 14.5 8.8 8
3/8″ LSLEB-10 85 56 33 30.25 60 20 14.5 8.8 8
7/16″ LSLEB-12 120 70 40 47.25 82.5 25 19.5 13 12
1/2″ LSLEB-12 120 70 40 47.25 82.5 25 19.5 13 12

Lead Screw Motors

Lead screws with NEMA 08, NEMA 11, NEMA 14, NEMA 17,and NEMA 23 motors from PBC Linear.Cost Reduction

Fusing the motor and screw together eliminates the need for a motor mount and coupling. This also reduces setup time.

Improved Performance

Factor alignment of the motor and screw means direct out of the box precision.

Variety

Many choices of nut styles and technologies including Constant Force, to cover almost every application need. Multiple standard machining and plating choices helps get what is needed quickly and easily.

Support & Customs

Not finding what you need or need a custom solution? PBC Linear has your engineering support covered!
Phone: 1-888-389-6266 or application.engineering@pbclinear.com

PBC Linear lead screw motor products are designed based on the know-how technology of hybrid step motors, lead screw and nuts. The NEMA Series lead screw motors provide high torque, high precision, and high efficiency to fit the application needs of designers. The combination of lead screw motor styles, sizes, lead-screws and nuts, gives the freedom to use motors of different form factors to exactly fit in the application. And, it provides the best performance with any drive and power supply.

  • Four frame Sizes: 11, 14, 17, 23
  • Multiple motor lengths and special PowerPlus motors, provide more than 10 different motor sizes
  • Integrate any lead screw from PBC Linear
  • Each frame size motor has 3-11 different standard lead screws
  • Each frame size motor has different selections of nuts

PBC Linear has committed to product innovation design and technical improvement, with excellent product quality, application technology, fast and flexible services, which provide customers with high level motion control solutions.

Motor Frame Screw Sizes
3/16" 6 mm 1/4"" 3/8" 10 mm 7/16" 12 mm 1/2" 16 mm
NEMA 8 ● ● ●
NEMA 11 ● ● ●
NEMA 14 ● ● ● ● ●
NEMA 17, Single Stack ● ● ● ● ● ● ●
NEMA 17, Double Stack ● ● ● ● ●
NEMA 23, Single Stack ● ● ● ● ● ●
NEMA 23, Double Stack ● ● ● ● ● ●
NEMA 23, Power Plus ● ● ● ● ● ●
PBC Linear uses an integrated hybrid linear actuator setup to reduce components and improve accuracy.

Lead Screw to Motor Connection Method Matters

Traditional Motor & Screw Setup

  • Multiple components that require assembly
  • Difficult to align
  • Play and tolerance between components result in lost accuracy
  • Increased potential for failure
  • Higher costs

Integrated Hybrid Linear Actuator Setup

  • Lead screw aligned and fixed directly with motor
  • Fewer components
  • Greater accuracy
  • More reliable
  • Higher rigidity
  • Greater value

Common Lead Screw Straightness Issues

PBC Linear utilizes an automated straightening process and holds tight TIR tolerances to eliminate common lead screw runout and straightness issues

Lead Screw Motors from PBC Linear utilizes an automated straightening process to prevent muliple-arched screws.
Lead Screw Motors from PBC Linear utilizes an automated straightening process to prevent single dominant arched screws.
Lead Screw Motors from PBC Linear utilizes an automated straightening process to prevent "snow-coning" straight screws.
Lead screw motors from PBC Linear are straight and concentric with the motor.

NEMA 08 Series Lead Screw

Phases 2
Steps / Rev 200
Step Accuracy ±5%
IP Rating 40
Approvals RoHS
Operating Temp -20°C to +50°C
Insulation Class B (130°C)
Insulation Resistance 100 MΩ
Step Motor - 4 Lead Bi-Polar
Motor Style Motor Body
Length (mm)		 Electrical
Connection		 Rated Current
(Amps)		 Winding
Ohms mH
±10% at 20°C Typical
NEMA 08 29.5 mm Plug In Connector 0.4 13.9 4

NEMA 11 Series Lead Screw

Phases 2
Steps / Rev 200
Step Accuracy ±5%
IP Rating 40
Approvals RoHS
Operating Temp -20°C to +50°C
Insulation Class B (130°C)
Insulation Resistance 100 MΩ
Step Motor - 4 Lead Bi-Polar
Motor Style Motor Body
Length (mm)		 Electrical
Connection		 Rated Current
(Amps)		 Winding
Ohms mH
±10% at 20°C Typical
NEMA 11 41 mm Plug In Connector 1 2.7 2.5

NEMA 14 Series Lead Screw

Phases 2
Steps / Rev 200
Step Accuracy ±5%
IP Rating 40
Approvals RoHS
Operating Temp -20°C to +50°C
Insulation Class B (130°C)
Insulation Resistance 100 MΩ
Step Motor - 4 Lead Bi-Polar
Motor Style Motor Body
Length (mm)		 Electrical
Connection		 Rated Current
(Amps)		 Winding
Ohms mH
±10% at 20°C Typical
NEMA 14 36 mm Plug In Connector 1.5 1.61 2.5

NEMA 17 Series Lead Screw

Phases 2
Steps / Rev 200
Step Accuracy ±5%
IP Rating 40
Approvals RoHS
Operating Temp -20°C to +50°C
Insulation Class B (130°C)
Insulation Resistance 100 MΩ
Step Motor - 4 Lead Bi-Polar
Motor Style Motor Body
Length (mm)		 Electrical
Connection		 Rated Current
(Amps)		 Winding
Ohms mH
±10% at 20°C Typical
NEMA 17 Single Stack 39.8 Plug In Connector 2 1.04 2.73
NEMA 17 Double Stack 48.3 Plug In Connector 2 1.30 2.90

NEMA 23 Series Lead Screw

Phases 2
Steps / Rev 200
Step Accuracy ±5%
IP Rating 40
Approvals RoHS
Operating Temp -20°C to +50°C
Insulation Class B (130°C)
Insulation Resistance 100 MΩ
Step Motor - 4 Lead Bi-Polar
Motor Style Motor Body
Length (mm)		 Electrical
Connection		 Rated Current
(Amps)		 Winding Note
Ohms mH
±10% at 20°C Typical
NEMA 23, Single Stack 57 Plug In Connector 2.2 1.6 7.2 Standard
NEMA 23, Double Stack 79 Plug In Connector 3.0 1.1 5.0 Standard
NEMA 23, Double Stack 79 Plug In Connector 3.0 1.1 3.7 PowerPlus

Non-Captive Lead Screw Motors

Non-captive lead screws with NEMA 11, NEMA 14, NEMA 17,and NEMA 23 motors from PBC Linear.

When to use a non-captive linear actuator

Non-captive types of lead screw driven linear actuators are different from the more common external versions in that they allow the lead screw to completely pass through the motor. This fundamental difference offers advantages for those that have limited space available or are looking to shrink the overall size of their design package.

The payload or object being moved is attached to the motor, and has screw ends that are typically fixed. In most cases, this setup can allow for a shorter overall screw to be used. It is also ideal for adding the external linear guide bearings that are almost always required for non-captive applications. They provide stiffness and eliminate deflection that causes premature wear on the nut, screw, and internal motor bearings. A less common situation is where the device or payload is attached to the end of the screw. This is only used for very light loads and requires external linear guidance for stiffness. It is an arrangement that also requires clearance for the screw to extend out the opposite side of the motor.

Traditionally, this nut has been a standard nut with no mechanism to account for the play between the external threads of the screw and the internal threads of the nut. PBC Linear have the only anti-backlash nut and lead screw assembly available off-the-shelf in a non-captive configuration.

Hybrid Linear Actuator Selection Chart
Motor Style Screw Sizes
3/16" 6 mm 1/4" 3/8" 10 mm
NEMA 11 ●
NEMA 14 ● ● ●
NEMA 17 ● ● ●
NEMA 23 ● ●

This unique combination offers the best positional performance available in a non-captive hybrid actuator by utilizing our patented Constant Force Technology (CFT), which provides greater than two times the superior backlash compensation as tested against competitors.

This advantage means that the self-lubricating nut will provide lubricant-free, consistent performance and preload over its lifetime. In addition, screws are available either uncoated or with a proprietary PTFE coating. These screws come with standard lead accuracy of 0.003 inches per foot, which is three times better than typical screws on the market.

Non-captive lead screw motors from PBC Linear allow the lead screw to completely pass through the motor.
Type Thread
Dir.		 Diameter
and Lead		 Coating Screw Length Nut Motor Left End Right End
LS R 0000 T - 0250.00 - NCF - 000 - THR - THR

Type

LS - Lead Screw

Thread Direction

R - Right

L - Left

Diameter and Lead

Lead is the axial distance the nut advances in one revolution of the screw. The lead is equal to the pitch times the number of starts. Pitch • starts = lead

Inch Thread Code
Lead 3/16" 1/4" 3/8"
N11 N14 & N17 N23
0.05" 18005
0.20" 37020
0.333" 25033
0.50" 18050
Metric Thread Code
Lead 6 mm 10 mm
N14 & N17 N23
1 mm 0601 1001
2 mm 0602 1002
4 mm 0604 1004
5 mm 0605 1005
6 mm 0606 1006
8 mm 0608 1008
10 mm 0610 1010
12 mm 0612 1012
16 mm 1016
25 mm 1025

Screw Length

Inch - 0000.00

Metric - 0000

Note: Screw type selected determines if length is inch or metric.

Coating

T - PTFE

U - Uncoated

Nut

NS - Non-Captive Standard

NCF - Non-Captive Anti-Backlash

Non-Captive Motor Size

Code Description
111 Nema 11 (28 mm frame size, 32 mm long)
(Requires a 3/16" screw)
112 Nema 11 (283 mm frame size, 41 mm long))
(Requires a 3/16" screw)
141 Nema 14 (31 mm frame size))
(Requires a 3/16", 1/4", 6 mm screw)
171 Nema 17 (43 mm frame size, 34 mm long))
(Requires a 3/16", 1/4", 6 mm screw)
172 Nema 17 (43 mm frame size, 40 mm long))
(Requires a 3/16", 1/4", 6 mm screw)
173 Nema 17 (43 mm frame size, 48 mm long))
(Requires a 3/16", 1/4", 6 mm screw)
231 Nema 23 (47 mm frame size, 45 mm long))
(Requires a 10 mm screw)
232 Nema 23 (47 mm frame size, 57 mm long))
(Requires a 10 mm screw)

Left End Journal

Left and/or Right End
Code Description
THR Threaded
NNN None

Right End Journal

Left and/or Right End
Code Description
THR Threaded
NNN None

NEMA 11 Series Lead Screw

Phases 2
Steps / Rev 200
Step Accuracy ±5%
IP Rating 40
Approvals RoHS
Operating Temp -20°C to +50°C
Insulation Class B (130°C)
Insulation Resistance 100 MΩ
Step Motor - 4 Lead Bi-Polar
Motor Style Part Number Motor Body
Length (mm)		 Electrical
Connection		 Rated Current
(Amps)		 Winding
Ohms mH
±10% at 20°C Typical
NEMA 11 111 32 Plug In Connector 0.67 6.1 5.4
NEMA 11 112 41 Plug In Connector 0.95 3.8 3.5

NEMA 14 Series Lead Screw

Phases 2
Steps / Rev 200
Step Accuracy ±5%
IP Rating 40
Approvals RoHS
Operating Temp -20°C to +50°C
Insulation Class B (130°C)
Insulation Resistance 100 MΩ
Step Motor - 4 Lead Bi-Polar
Motor Style Part Number Motor Body
Length (mm)		 Electrical
Connection		 Rated Current
(Amps)		 Winding
Ohms mH
±10% at 20°C Typical
NEMA 14 141 35 Plug In Connector 1.5 1.60 2.5

NEMA 17 Series Lead Screw

Phases 2
Steps / Rev 200
Step Accuracy ±5%
IP Rating 40
Approvals RoHS
Operating Temp -20°C to +50°C
Insulation Class B (130°C)
Insulation Resistance 100 MΩ
Step Motor - 4 Lead Bi-Polar
Motor Style Part Number Motor Body
Length (mm)		 Electrical
Connection		 Rated Current
(Amps)		 Winding
Ohms mH
±10% at 20°C Typical
NEMA 17 171 34.3 Plug In Connector 1 4.3 7.7
NEMA 17 172 39.8 Plug In Connector 1.5 1.98 5.3
NEMA 17 173 48.3 Plug In Connector 2 1.3 3.1

NEMA 23 Series Lead Screw

Phases 2
Steps / Rev 200
Step Accuracy ±5%
IP Rating 40
Approvals RoHS
Operating Temp -20°C to +50°C
Insulation Class B (130°C)
Insulation Resistance 100 MΩ
Step Motor - 4 Lead Bi-Polar
Motor Style Part Number Motor Body
Length (mm)		 Electrical
Connection		 Rated Current
(Amps)		 Winding
Ohms mH
±10% at 20°C Typical
NEMA 23 231 45 Plug In Connector 2.1 1.54 4.1
NEMA 23 232 57 Plug In Connector 2.2 1.60 7.2
Diameter Leads
1 mm 2 mm 4 mm 5 mm 6 mm 8 mm 10 mm 12 mm 16 mm 25 mm 0.05″ 0.10″ 0.20″ 0.25″ 0.333″ 0.50″ 1.00″
Travel per 1.8° Step (mm) Travel per 1.8° Step (in)
0.005 0.010 0.020 0.025 0.030 0.040 0.050 0.060 0.080 0.125 0.00025" 0.0005" 0.001" 0.00125" 0.00166" 0.0025" 0.005"
3/16" 18005 18050
6mm 0601 0602 0604 0605 0606 0608 0610 0612
1/4" 25033
3/8" 37020
10mm 1001 1002 1004 1005 1006 1008 1010 1012 1016 1025
7/16" 43100
12mm 1201 1202 1204 1205 1206 1208 1210 1212 1216 1225
1/2" 50010 50025
16mm 1601 1602 1604 1605 1606 1608 1610 1612 1616 1625

Wiring Harnesses

Wiring Harness for Lead Screw Motor | PBC Linear.
Wiring Harness Connector | PBC Linear.
4 Lead Part Number 6200727 Wiring Diagram | PBC Linear
4 Lead Part Number 6200728 Wiring Diagram | PBC Linear
4 Lead Part Number 6200490 Wiring Diagram | PBC Linear
4 Lead Part Number 6200491 Wiring Diagram | PBC Linear
Wiring Diagram | PBC Linear
4 Lead (bipolar) Connector Pin# | PBC Linear

PBC Linear Line of Actuators

Ball Screws

Our miniature ball screws are precision-rolled to achieve lead accuracy and consistency over the full length of the screw, making them a critical asset to laboratory machines, medical devices, and mechatronic applications.

  • Screw diameters of 6, 8, & 10 mm with various leads.
  • Standard, no preload (backlash ≤ 0.05 mm MAX)
  • Standard and special machined journals available
  • End support blocks and bearings available
Ball screw motor assembles from PBC Linear are available for high accuracy applications.

LSM Lead Screw Motors And Hybrid Linear Actuators

  • 6, 10, 12, and 16 mm diameters; 1 - 25 mm leads
  • Custom sizes, materials, and finishes available
  • Constant Force™ screw and nut
    • Patent pending self-adjusting anti-backlash feature
    • Patent pending coil spring adjustable nut
  • 300 series stainless steel screw with PTFE coating
  • NEMA 17, 23, 34 flange sizes–single, double, triple stack stepper motors
Lead screw motors and hybrid linear actuators are available from PBC Linear.

ML Series Actuators

  • Compact profile 28 x 32 mm for small-scale automation
  • High speed precision, enhanced load capacities, and precise repeatability
  • Linear guide supports—available in single or dual rails
  • Long travel lengths—up to 650 mm
ML Series Linear Actuators from PBC Linear offer high-speed precision, high load capacities, and precise repeatability.

Compact Series Actuators

  • Plain bearing or ball bearing options
  • Lead screw diameter and lead options
  • Constant Force Technology nuts or standard fixed nuts
  • Motor options: Integrated motor or motor mount setup
Compact Series Linear Actuators from PBC Linear are available with self- lubricating or ball bearing systems.

UG Series SIMO® Actuators–Versatile, Flexible, Affordable

  • All critical edges machined concurrently in one pass
  • Integrated or motor mount drive mechanism
  • Built to either low profile or tall base rail
UG Series Linear Actuators from PBC Linear are available with low or tall profile base rails.

MT Series Actuators

  • High acceleration, speeds, and rigidity—long travel lengths
  • Fully enclosed aluminum housing
  • Strong yet lightweight and corrosion-resistant
MTB Series Linear Actuators from PBC Linear are ideal for high accelerations, high speeds, and long travel lengths.

PL Series Actuators

  • Enclosed aluminum housing with Integral V™ raceway
  • High speed cam roller design is sealed against contamination
  • Many accessories—sensors, mounting brackets, etc.
PLA Series Linear Actuators from PBC Linear sealed to protect against contamination.

MUK Series Actuators

  • Incorporates two 20 mm recirculating ball profile rail guideways
  • Load capabilities up to 11200 N; maximum stroke = 1500 mm
  • Single or dual carriage options available
MUK Series Linear Actuators from PBC Linear have high load capacities.

Simplicity Linear Slides

  • Handles heavy loads in harsh, contaminated environments
  • Low profile systems for applications with height constraints
  • Rail shaft diameters from 12.7 mm (0.5 in) to 50.8 mm (2.0 in)
  • Rail lengths to 2440 mm (96 in)
  • Carriage speeds up to 0.457 m/s (18 in/s)
  • Normal carriage loads up to 83000 N (18750 lbf)
Simplicity Linear Actuators from PBC Linear handle heavy loads in harsh environments.