Precision Lead Screws and Nut Assemblies

Reliance’s lead screw and nut assemblies provide a flexible, integrated solution for linear motion.  Available in a wide choice of sizes and styles, with options for custom designed end modifications, the range offers the flexibility to address a wide variety of requirements.

The lead screw and nut assemblies have been designed specifically for motion control applications, rather than using adaptations of general-purpose screws and nuts. There are 11 different nut styles, with a choice of mounts and also options for custom-designed nuts. Nuts are made from molded plastic, which enables custom nuts to be produced with features of the drive system, such as bushings, carriages, pulleys and gears, integrated within the nut. This type of custom, multi-functional nut can offer a significant reduction in part count, reducing cost and assembly time in the overall mechanism.

Standard Nut Styles

Lead Screw with LBF miniature nut

The LBF and LBY miniature lead screw nuts are ideal for low force, high accuracy applications where space is at a premium and anti-backlash or wear compensation are not required.

The Miniature LBF and LBY nuts are suitable for dynamic loads of up to 107.87 N (11 kg). They are manufactured from self-lubricating polyacetal, which is particularly beneficial when coupled with a precision TFE coated lead screw, and are available with a flange or thread mount option. 

Lead Screw with LPX Nut

The LPX lead screw nuts are ideal for high load combined with high accuracy applications that do not require anti-backlash or wear compensation. The LPX plain nuts are suitable for dynamic loads of up to 2.226 kN (227 kg).

They are manufactured from self-lubricating polyacetal, which is particularly beneficial when coupled with a precision TFE coated lead screw. They are available with a round or triangular flange or thread mount option and can be easily customized to suit many bespoke configurations.

Lead Screw with LNTG miniature nut

The LNTG Miniature lead screw nuts are ideal for low force, high accuracy applications where space is at a premium and are suitable for dynamic loads of up to 22.55 N (2.3 kg). They are manufactured from self-lubricating polyacetal, which is particularly beneficial when coupled with a precision TFE coated lead screw, the compact design offers an adjustable drag torque which can to be pre-set according to system requirements. The lead screw nuts are available with a flange or thread mount option.

Lead Screw with LNTG miniature nut

The LNTG manually adjustable anti-backlash lead screw nuts are ideal for low force, high accuracy smooth motion, and precise positioning applications where space is at a premium and are suitable for dynamic loads of up to 89.24 N (9.1 kg). They are manufactured from self-lubricating polyacetal, which is particularly beneficial when coupled with a precision TFE coated lead screw. The compact nut design offers an adjustable drag torque which can to be pre-set according to system requirements. The LNTG anti-backlash nuts are available with a triangular flange or thread mount option.

Lead Screw with LNTB miniature nut

The LNTB miniature lead screw nuts are ideal for low force, high accuracy applications where space is at a premium and are suitable for dynamic loads of up to 22.55 N (2.3 kg). They are manufactured from self-lubricating polyacetal, which is particularly beneficial when coupled with a precision TFE coated lead screw offering axial stiffness through life with minimal drag torque, and are available with a flanged or thread mount option.

Lead Screw with LNTB nut

The LNTB anti-backlash lead screw nuts are ideal for medium duty, high accuracy applications and suitable for dynamic loads of up to 882.60 N (90 kg). They are manufactured from self-lubricating polyacetal, which is particularly beneficial when coupled with a precision TFE coated lead screw, and have a flexible self-compensating, anti-backlash design, which offers a maintained axial stiffness through life with a minimal system drag torque. The LNTB anti-backlash nuts are available with a round or triangular flange or thread mount option.

Lead Screw with LAF nut

The LAF anti-backlash lead screw nuts are ideal for light duty, high accuracy applications and suitable for dynamic loads of up to 156.91 N (16 kg). They are manufactured from self-lubricating polyacetal, which is particularly beneficial when coupled with a precision TFE coated lead screw. The LAF lead screw nuts have a self-compensating, anti-backlash design, which offers precise accuracy and repeatability, horizontal and vertical damping properties, and maintained axial stiffness through life with a minimal system drag torque. They are available with a triangular flange or thread mount option.

Lead Screw with LAB nut

The LAB anti-backlash lead screw nuts are ideal for light duty, high accuracy application and suitable for dynamic loads of up to 156.91 N (16 kg). Manufactured from self-lubricating polyacetal, which is particularly beneficial when coupled with a precision TFE coated lead screw, the LAB nuts have a manually adjustable anti-backlash design which offers, precise accuracy and repeatability, and maintained axial stiffness through life with a minimal system drag torque. They are available with a triangular flange or thread mount option. 

Lead Screw with LAK nut

The LAK anti-backlash lead screw nuts are ideal for medium duty, high accuracy applications and suitable for dynamic loads of up to 98.1 N (10 kg). Manufactured from self-lubricating polyacetal, which is particularly beneficial when coupled with a precision TFE coated lead screw, the LAK nuts have a self-compensating, anti-backlash design with manual adjustment for fine tuning. This offers precise accuracy and repeatability with maintained axial stiffness through life with a low system drag torque. The anti-backlash nuts are available with a triangular flange or thread mount option.

Lead Screw with LWD nut

The LWD anti-backlash lead screw nuts are ideal for medium duty, high accuracy applications and suitable for dynamic loads of up to 333.43 N (34 kg). Manufactured from self-lubricating polyacetal, which is particularly beneficial when coupled with a precision TFE coated lead screw, the LWD nuts have a compact, self-compensating, anti-backlash design. This offers accuracy for precise positioning with maintained axial stiffness through life and minimal system drag torque. The anti-backlash nuts are available with a triangular flange or thread mount option.

Lead Screw with LCM nut

The LCM anti-backlash lead screw nuts are ideal for light duty, high accuracy applications and suitable for dynamic loads of up to 35.3 N (3.6 kg). Manufactured from self-lubricating polyacetal, which is particularly beneficial when coupled with a precision TFE coated lead screw, the LCM nuts have a compact, self-compensating, anti-backlash design. This offers accuracy for precise positioning with maintained axial stiffness through life and minimal system drag torque. The anti-backlash nuts are available with a triangular flange or thread mount option. 

Lead Screw with LAX nut

The LAX anti-backlash lead screw nuts are ideal for heavy duty applications requiring high axial and radial stiffness and a low system drag torque and are suitable for dynamic loads from 667 N (68 kg) up to 1560 N (159 kg). Manufactured from self-lubricating polyacetal, which is particularly beneficial when coupled with a precision TFE coated lead screw, the LAX nuts have a self-compensating, anti-backlash design, which offers a maintained axial stiffness through life. The anti-backlash nuts are available with a round flange or thread mount option.

Lead Screw – uncoated

Lead screws are rolled from a premium grade, corrosion resistant and non-magnetic 303 stainless steel. Other materials are available including 316 and 400 series stainless steel, precipitation hardened steels, aluminium and titanium. These materials are ideally suited for industries such as medical, vacuum, cleanroom, food and human contact, salt spray and cryogenics

Lead Screw – TFE coated

Standard lead screw nuts are manufactured from self-lubricating plastics. We also offer soft TFE and hard BFE low friction coatings for the lead screw; lubrication to the screw/nut interface occurs by the nut picking up TFE particles from the coating as well as from migration of the internal lubricant from within the plastic nut.

We also supply lead screws with specialist nickel/TFE coatings and offer a choice of coatings used in medium vacuum applications (up to 10-5). Alternatively a BFE coating can be provided. This is a special proprietary hard coating which shares many of the benefits of TFE coating but offers exceptional durability in more aggressive environments and where reduced friction and a permanent coating is desired.