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Thomson BSA® precision lead screws are an excellent economical solution for your linear motion requirements. For more than 25 years, Thomson BSA has designed and manufactured the highest quality lead screw assemblies in the industry. Our precision rolling machines ensure accurate positioning to 0.003 in/ft and our PTFE coating process produces assemblies that have less drag torque and last longer.
Durable ACME screws with a vast size portfolio intended for higher load applications
Precision lead screws with very fine accuracy grades and modest load capacities
Miniature precision lead screws that are easily configurable for small-scale or space-constrained applications. (Diameters as small as 2mm)
Hybrid stepper motor and a precision lead screw in one compact envelope
Thomson lead nuts are only compatible with Thomson lead screws.
High quality alloy steel screws with precision bronze acme nuts.
Anti-wedging nut for smooth, quiet performance.
Rolled thread screws in wide range of diameter and lead combinations.
Lead screw assemblies with standard or anti-backlash lead nuts.
Performance lead nuts in various materials and backlash configurations.
Precision lead screws in many coating configurations, diameters, leads, and lengths.
Clearance between screw and nut of up to 0.010 in (0.25 mm)
Preloaded nuts with no play between the screw and nut.
Clearance between screw and nut.
Field-adjustable assembly allows removal of play between screw and nut.
Nut Supplied with flange for easy installation.
Configuration allowing nut to be mounted by threading directly into assembly.
Clearance between screw and nut.
Field-adjustable assembly allows removal of play between screw and nut.
Clearance between screw and nut.
Field-adjustable assembly allows removal of play between screw and nut.
Standard grade screws with an accuracy of up to 0.010 in/ft (250µm/300mm).
Precision grade screws with an accuracy of up to 0.003 in/ft (75µm/300mm).
Configuration allowing nut to be mounted by threading directly into assembly. Metric and imperial threads available.
Configuration allowing nut to be face mounted with standard fasteners. Triangular, circular, and rectangular flange options available.
Nut Supplied with flange for easy installation.
Configuration allowing nut to be mounted by threading directly into assembly.
Nut Supplied with flange for easy installation.
Configuration allowing nut to be mounted by threading directly into assembly.
Nut Supplied with flange for easy installation.
Configuration allowing nut to be mounted by threading directly into assembly.
Nut Supplied with flange for easy installation.
Configuration allowing nut to be mounted by threading directly into assembly.
Nut Supplied with flange for easy installation.
Configuration allowing nut to be mounted by threading directly into assembly.
Compact nut in bearing grade Acetal with a triangular mounting flange. For lead screws up to 0.375 in or 10 mm diameter.
Compact nut in bearing grade high performance PEEK with a triangular mounting flange. For lead screws up to 0.375 in or 10 mm diameter.
Bearing grade Acetal nut with a triangular or round mounting flange. For up to 0.75 in or 20 mm diameter screws.
Bearing grade Acetal nut with imperial (inch) mounting threads.
Bearing grade bronze nut with imperial (inch) mounting threads.
Bearing grade Acetal nut with metric mounting threads.
Flange mount nut with high axial stiffness, low drag, and active wear compensation.
Flange mount nut with a design loads of up to 25 lbs (111 N).
Imperial or metric thread mount nut with high axial stiffness, low drag, and active wear compensation.
Customizable thread mount nut with a spring pre-load of up to 20 lbs (89 N).
Compact nut in bearing grade Acetal with a triangular mounting flange. For lead screws up to 0.375 in or 10 mm diameter.
Compact nut in bearing grade high performance PEEK with a triangular mounting flange. For lead screws up to 0.375 in or 10 mm diameter.
Bearing grade Acetal nut with a triangular or round mounting flange. For up to 0.75 in or 20 mm diameter screws.
Bearing grade Acetal nut with imperial (inch) mounting threads.
Bearing grade bronze nut with imperial (inch) mounting threads.
Bearing grade Acetal nut with metric mounting threads.
Flange mount nut with high axial stiffness, low drag, and active wear compensation.
Flange mount nut with a design loads of up to 25 lbs (111 N).
Imperial or metric thread mount nut with high axial stiffness, low drag, and active wear compensation.
Customizable thread mount nut with a spring pre-load of up to 20 lbs (89 N).
Why are lead screws such a popular choice for precision linear applications? Learn not only their long list of benefits but how you can put these components to work for your design projects and applications.
Presenter: Saurabh Khetan, Product Line Manager - Lead Screws, Thomson
Jeff Johnson, Thomson Screw Product Engineer, says ball screws and lead screws can sometimes be used in the same applications. Typically, ball screws are used in industry applications that need a lot of load or life while lead screws are used in smaller, lighter duty applications. Lead screws however are highly customizable with the ability to interchange leads, sizes, nut configurations quickly. Cost is usually not the primary consideration when selecting a screw technology. Watch this video to learn the differences.
For proper performance of your XC lead nut, installation steps for its five components must be followed closely.
Ball screws are often viewed as the first choice for linear motion applications because the use of recirculating ball bearings provides a high level of efficiency, load capacity and positioning accuracy. However, with careful attention to selection and application, lead screws can deliver efficiency that comes close to ball screws on many applications, high levels of load capacity and very good positioning accuracy
Learn MoreWhich motor is right for your lead screw application? A properly integrated lead screw and motor can cut costs, boost performance, simplify maintenance and provide greater prototyping flexibility. Three of the most common approaches include implementing an external shaft coupling; permanently or semi-permanently fusing the lead screw and the motor shaft together; and using detachable connections. This article covers the key considerations when comparing these options.
Learn MoreThis article answers five key questions about specifying lead screws for your linear motion applications.
Learn MoreBSA Lead Screws | 1455 KB | |
BSA Lead Screws | 1463 KB | |
BSA Lead Screws | 1484 KB | |
BSA Lead Screws | 2713 KB | |
Miniature Lead Screws | 1372 KB | |
Miniature Lead Screws | 5121 KB | |
Miniature Lead Screws | 1760 KB | |
Stepper Motor Linear Actuators | 11778 KB | |
Stepper Motor Linear Actuators | 9252 KB | |
Stepper Motor Linear Actuators | 4289 KB | |
Stepper Motor Linear Actuators | 3629 KB | |
Miniature Components and Systems | 6871 KB | |
Miniature Components and Systems | 6862 KB | |
Miniature Components and Systems | 1603 KB |
+ Lead Screw Assemblies | |||
Lead Screw Assemblies - Inch | — | — | |
Lead Screw Assemblies - Metric | — | — | |
Mini Lead Screw Assemblies (< 4mm diameter) | — | — | |
+ Lead Screw Nuts | |||
Lead Screw Nuts - Inch | — | — | |
Lead Screw Nuts - Metric | — | — | |
Mini Lead Screw Nuts (< 4mm diameter) | — | — | |
+ Screws | |||
Lead Screws - Inch | — | — | |
Lead Screws - Metric | — | — | |
Mini Lead Screws (< 4mm diameter) | — | — |
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