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Precision Plus Ground Inch Ball Screws

Precision Plus Ground Inch Ball Screws

Thomson Precision Plus Ground Ball Screw Assemblies provide the positioning accuracy and repeatability required for the most stringent positioning applications.  They are designed and manufactured to provide 8 times the lead accuracy of conventional ball screws (±.0005 in/ft), and provide consistent, zero-backlash, preload for high repeatability.  All ball nuts feature an integral flange for optimal precision and mounting ease, and specially designed seals/wipers that provide superior lubricant retention while keeping out harmful contaminants.


Precision Plus Ground Specifications (Inch Units):

Lead (inch) 
0.200 0.250 0.500
0.631 X  
0.750 X    
0.875 X    
1.000 X X  
1.150 X    
1.250 X   X
1.500 X X X
1.750 X    
2.000 X    
2.250     X
2.500   X  

Precision Plus Ground Highlights:

  • Eight times the lead accuracy of conventional precision ball screws 
  • Gothic arch ball groove geometry that extends service life, reduces lash, and optimizes stiffness in preloaded assemblies
  • Standard and custom machined ends available  
  • Integral wipers and flanges for system cleanliness and mounting ease
  • Optimum efficiency and cost-savings when replacing expensive hydraulic and pneumatic systems
  • Non-standard lengths available
  • Predictable service life allowing for the most reliable system designs
  • Zero-lash, high stiffness preloaded design provides positioning accuracy and repeatability for machine tools, robots, material handling systems, electronic component insertion systems and more

Find a Product

Product Type

Screw Diameter

Screw Lead

Axial Load


Thread Direction


Product Family

CAD Models

  • Configurable 2D/3D Partstream Models
  • Configurable 2D/3D Solidcomponents Models
  • Configurable 2D/3D PartServer Models
  • Static 2D/3D Model file downloads

NOTE: Please use Internet Explorer 11, Edge, Firefox, or Google Chrome with Edrawings Viewer

Partstream Interactive Viewer Instructions:
1) Select a product from the table below and Configure your model to the right of the viewer that appears.
2) Click the Create button at the bottom of the configurator and wait for model to load (may take a few minutes).
3) Click the Download tab and login to your account if requested (or register as a first-time user).
4) Select a format, wait for the file to be created (may take a few minutes), and click the Download button.

Precision Plus Ground Ball Screws (Inch)
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