A lead screw is a screw which translates rotary motion into linear motion. Normally used as the driving mechanism in horizontal or vertically driven applications aided by linear guides for supports. They are described by diameter and pitch or lead. The pitch or lead is the amount of travel you get, or distance the nut travels along the screw for every complete revolution. They can be operated manually or motorised.
As specialists in linear motion systems we offer you a choice of materials and sizes. So whether you need lightweight aluminium rails for use in aviation applications or stainless steel components for when exposure to water or corrosive chemicals is a factor, our knowledgable technical engineers are always on hand to provide assistance.
Make sure you request a free Linear Motion Handbook here and utilise our free CAD to help you save time planning your projects.
For applications that demand a high accuracy, we also stock high precision lead screws, which are made to closer tolerances than standard lead screw manufacturing allows. Click here to find out more.
Rolled trapezoidal C45 steel lead screws, right hand thread. Lengths of up to 6 meters can be provided. Tr 10 to Tr 120.
Rolled trapezoidal C45 steel lead screws, left hand thread. Lengths of up to 6 meters can be provided. Tr10 to Tr 120.
Rolled trapezoidal AISI 316 grade (A4) stainless lead screws, right hand thread. Surface hardness 280HB. Lengths of up to 6 meters can be provided. Tr 10 to Tr 120.
Anodized aluminium or 416 stainless steel screw with square acetal resin nut. High precision, tight axial clearance. Nut fitted to screw to ensure anti-backlash.
Anodized aluminium or 416 stainless steel screw with round acetal resin nut. It is suited to dry atmospheres, fresh water and mild alkalis and acids. Nut fitted to screw to ensure anti-backlash.
Anodized aluminium or 416 stainless steel screw with round acetal resin nut. High precision. Nut fitted to screw to ensure anti-backlash.
Stainless SUS 304, high helix lead screw. High precision. See L1350 for corresponding nut.
Steel square nuts for lead screws. Standard nuts are right hand thread, single starts.
Manufactured to ISO 2901/2903 (DIN 103). Used for clamping and locking applications, and for slow rotational speeds with manual control; steel-to-steel contact surface is not suitable for motorised motion.
Plastic, flanged lead screw nuts with long thread to reduce wear and enhance service lifetime.
Steel with black oxide finish. Nickel plated versions for cleanroom applications can be produced on request.
These fixed support units are for the driven end of the lead screw. This unit can easily be bolted down.
Fixed support unit for the driven end of the lead screw. Please note that we can machine the ends of your lead screw to your requirements.
Floating support unit for the non-driven end of the lead screw. Having one fixed and one floating support unit means your lead screw will not seize up.
We also stock a range of other lead screw accesories, such as handwheels for manually driven lead screws.
We can perform lead screw end machining to support your applications. Please submit your technical drawings to our technical sales team, who will be able to help.Contact our sales team
For more detailed information, please see our lead screw technical page.
Easy to install. Allows for some misalignment at installation. Compact system, small footprint compared to other rail systems. Preload adjustable by hand.
Although it can take very large loads it cannot take anywhere near as much load as the linear guideways rail system.
Cheaper alternative to the compact rail. Use of T and U rails allows for misalignment at installation. Preload adjustable by hand.
Available in AISI 316L stainless steel suitable for use in applications requiring a high level of corrosion resistance, including sea water.
Cannot take as much load as other systems. Not suitable for moment loads.
Can take extremely high loads including moment loads. Very smooth in operation.
Must be aligned very accurately which costs time and money preparing the mounting surface properly.
Available in a range of materials and sizes. A length of shaft bar is typically cheaper than the cost of an equivalent size precision linear rail.
A larger diameter shaft would be required when there are long lengths and high loads involved compared with the size of an equivalent shaft support rail you would need. This is because they would only be supported at the ends and the shaft ends could bend in the middle if the diameter was too small.
Shaft support rail systems have a shaft support along the full length so are less likely to flex.
Similar to linear guideways, must be aligned very accurately otherwise any misalignment may cause the system to ‘snatch’.