Lead screw with a standard round nut, 254mm length, 10mm diameter, 1mm lead, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With an exceptional lead accuracy of 0.003"/ft (76 µm/300 mm), the lead screw exceeds industry standards, providing improved straightness, a..
$72.57
Lead Screw with a Rectangle Anti-Backlash Nut featuring a 6mm diameter, 1mm lead, and a length of 254mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4 times..
$80.44
Lead screw with a standard round nut, 508mm length, 16mm diameter, 5mm lead, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With an exceptional lead accuracy of 0.003"/ft (76 µm/300 mm), the lead screw exceeds industry standards, providing improved straightness, a..
$129.20
Lead Screw with a Round Anti-Backlash Nut and a 16mm diameter, 5mm lead, and a length of 508mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Round Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$149.75
Lead screw with a standard round nut, 508mm length, 16mm diameter, 1mm lead, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With an exceptional lead accuracy of 0.003"/ft (76 µm/300 mm), the lead screw exceeds industry standards, providing improved straightness, a..
$129.20
Lead Screw with a Round Anti-Backlash Nut and a 16mm diameter, 1mm lead, and a length of 508mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Round Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$149.75
Lead screw with a standard triangle nut, 12mm diameter, 5mm lead, 508mm length, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With exceptional lead accuracy of 0.003"/ft (76 µm/300 mm) and precision straightening from the only automated CNC lead screw straightening..
$121.23
Lead screw with a standard round nut, 508mm length, 12mm diameter, 5mm lead, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With an exceptional lead accuracy of 0.003"/ft (76 µm/300 mm), the lead screw exceeds industry standards, providing improved straightness, a..
$121.23
Lead Screw with a Round Anti-Backlash Nut and a 12mm diameter, 1mm lead, and a length of 508mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Round Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$132.41
Lead Screw with a Round Anti-Backlash Nut and a 12mm diameter, 5mm lead, and a length of 508mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Round Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$132.41
Lead screw with a standard triangle nut, 12mm diameter, 1mm lead, 508mm length, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With exceptional lead accuracy of 0.003"/ft (76 µm/300 mm) and precision straightening from the only automated CNC lead screw straightening..
$121.23
Lead screw with a standard round nut, 508mm length, 12mm diameter, 1mm lead, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With an exceptional lead accuracy of 0.003"/ft (76 µm/300 mm), the lead screw exceeds industry standards, providing improved straightness, a..
$121.23
Lead screw with a standard round nut, 508mm length, 10mm diameter, 5mm lead, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With an exceptional lead accuracy of 0.003"/ft (76 µm/300 mm), the lead screw exceeds industry standards, providing improved straightness, a..
$121.23
Lead screw with a standard triangle nut, 10mm diameter, 5mm lead, 508mm length, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With exceptional lead accuracy of 0.003"/ft (76 µm/300 mm) and precision straightening from the only automated CNC lead screw straightening..
$121.23
Lead Screw with a Round Anti-Backlash Nut and a 10mm diameter, 5mm lead, and a length of 508mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Round Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$132.41
Lead screw with a standard triangle nut, 10mm diameter, 1mm lead, 508mm length, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With exceptional lead accuracy of 0.003"/ft (76 µm/300 mm) and precision straightening from the only automated CNC lead screw straightening..
$121.23
Lead screw with a standard round nut, 508mm length, 10mm diameter, 1mm lead, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With an exceptional lead accuracy of 0.003"/ft (76 µm/300 mm), the lead screw exceeds industry standards, providing improved straightness, a..
$121.23
Lead Screw with a Round Anti-Backlash Nut featuring a 10mm diameter, 1mm lead, and a length of 508mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Round Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$132.41
Lead screw with a standard triangle nut, 12mm diameter, 5mm lead, 254mm length, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With exceptional lead accuracy of 0.003"/ft (76 µm/300 mm) and precision straightening from the only automated CNC lead screw straightening..
$72.57
Lead screw with a standard round nut, 254mm length, 12mm diameter, 5mm lead, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With an exceptional lead accuracy of 0.003"/ft (76 µm/300 mm), the lead screw exceeds industry standards, providing improved straightness, a..
$72.57
A lead screw, also called a leadscrew, is a precision threaded metal rod that converts rotary motion into controlled straight-line movement by using sliding contact between its threads and a correspondingly threaded, load-carrying nut to carry and position a load along a single linear axis. Unlike ball screws, which use recirculating ball bearings between the screw and nut to reduce friction, lead screws rely on direct sliding contact between the mating threads. Lead screw assemblies are available with different nut shapes and styles, including round, triangular, and rectangular configurations, while screws are offered in multiple diameters, thread profiles, pitches, leads, starts, and lengths for different loads, speeds, travel distances, and positioning requirements. Pitch is the distance between adjacent threads, lead is the distance the nut travels per screw revolution, and a start is one continuous helical thread. Pitch and lead are equal on a single-start screw, while lead equals pitch multiplied by the number of starts on a multi-start screw.
PBC Linear lead screw assemblies combine precision-rolled, PTFE-coated 300 Series stainless steel screws with self-lubricating, PTFE-infused Frelon® composite polymer nuts to reduce friction and wear while distributing loads across the engaged threads. Metric lead screws range from 6mm to 16mm in diameter with lead options from 1mm to 25mm, with corresponding inch configurations also available. Round, triangular, and rectangular nuts are offered in standard and Constant Force™ Anti-Backlash designs. Constant Force nuts use spring pressure to maintain thread engagement, with PBC Linear specifying 2–4 times less backlash over their operating life compared with standard nuts. Dynamic load capacity reaches 1.16kN (260lb), depending on configuration.
The leadscrews are precision-rolled and straightened in-house using a Galdabini PAS 4 STEP automated straightening machine to achieve published lead accuracy of approximately ±0.003in/ft (76µm/300mm). This collection features non-motorized lead screw assemblies organized by nut shape; motorized lead screw assemblies are available separately as screw-driven linear actuators.
- Lead screw assemblies for carrying and positioning loads along a single linear axis
- Precision-rolled 300 Series stainless steel lead screws
- PTFE-coated screws paired with self-lubricating Frelon® composite polymer nuts
- Metric screw diameters: 6mm, 8mm, 10mm, 12mm, and 16mm
- Lead options: 1mm to 25mm, with corresponding inch configurations available
- Round, triangular, and rectangular lead screw nut configurations
- Standard and Constant Force™ Anti-Backlash nut designs
- Constant Force™ nuts specified for 2–4 times less backlash over their operating life than standard nuts
- Dynamic load capacity up to 1.16kN (260lb), depending on configuration
- Published lead accuracy: approximately ±0.003in/ft (76µm/300mm)
- Non-motorized assemblies; motorized configurations available separately as screw-driven linear actuators
Our Blog Posts About Lead Screws:
- How Are Lead Screws Made
- How to Check Lead Screw Accuracy and Straightness
- Lead Screw Precision in Medical Applications
- Lead Screw Straightener at PBC Linear
- Non-Captive Lead Screw Linear Actuators
- How to Prevent Lead Screw Load Drift
- Components of Lead Screws, Ball Screws and Linear Rails
- 3 Methods of Connecting Lead Screws to Motors
- Glossary: What is Lead Screw Efficiency
Frequently Asked Questions
What is thread handedness and how does it relate to screw rotation direction?
Thread handedness describes whether a screw has right-hand or left-hand threads. In a typical lead screw assembly, the screw rotates and drives a matching threaded, non-rotating nut axially. The direction of that axial movement depends on both thread handedness and rotation direction. A right-hand thread and a left-hand thread will move the nut in opposite directions when rotated the same way. For a right-hand thread, turning the screw clockwise moves the nut away from the viewer when the screw is viewed from its end, assuming the nut is prevented from rotating. Reverse the rotation, and the nut moves toward the viewer.
What is the difference between a lead screw and screw lead?
A lead screw is the threaded mechanical component used to create linear motion. Screw lead is a measurement: the distance the nut or screw travels axially in one full rotation. In simple terms, the lead screw is the part, while screw lead describes how far it moves per turn.
What is an anti-backlash nut?
An anti-backlash nut is a lead screw nut designed to reduce axial clearance (axial play) between the screw and nut threads. It uses a spring-loaded section to maintain preload against the screw and keep the mating threads in contact. Backlash is the reversal error caused by this clearance, which allows the screw to turn slightly after changing direction before the nut begins to move. By reducing axial clearance without preventing normal travel along the lead screw, the nut improves repeatability, positioning control, and motion stability.
What is a leadscrew pitch, lead, and start?
Pitch is the distance between adjacent screw threads. Lead is the distance the nut travels during one full screw revolution. A start is one continuous helical thread running along the screw. On a single-start lead screw, pitch and lead are the same. On a multi-start lead screw, lead equals pitch multiplied by the number of starts.
What does PTFE coating do on a lead screw?
PTFE coating helps reduce friction, wear, and flaking between the lead screw and nut. It can also support smoother travel, quieter operation, and improved corrosion resistance, especially when used with stainless steel lead screws.
Can lead screws be motorized?
Yes. Lead screws can be paired with motors, hand cranks, knobs, or customer-supplied drive systems. Motorized lead screw assemblies are commonly used with linear guide components as compact linear actuators in positioning systems, adjustment mechanisms, and automation equipment.
Why are both “lead screw” and “leadscrew” used for the same term?
Both spellings describe the same mechanical component. “Lead screw” is the open compound form, while “leadscrew” developed as the closed engineering term. Merriam-Webster records the first known use of “leadscrew” in 1875, showing that the one-word spelling has been part of technical English since the early era of industrial machinery rather than being a modern variation.
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