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XC Advanced Anti-Backlash Supernuts

XC Advanced Anti-Backlash Supernuts

Thomson BSA's XC series of lead screw nuts has the best anti-backlash technology, using a stainless steel cam (ActiveCAM™) to create a solid bias between the nut halves. A torsional spring maintains the tension between the parts, while still having low torque and drag. The ActiveCAM design results in the stiffest assembly possible using polymer lead screw nuts. Every movement with XC series lead screw nuts is exact and repeatable. This provides a light- and medium-duty anti-backlash screw that rivals ball screws for precision.


XC Advanced Specifications (Metric Units):

Model Dia.
Lead (mm)
2 3 4 5 6 8 10 12 15 16 20 25 35 45
XC3700 10 X X X X X X X
XC5000 12 X X X X X X X X
XC6200 16 X X X X X X
XC7500 20 X X X X X X
XC10000 24 X

XC Advanced Specifications (Imperial Units):

Model Dia.
Lead (inch, unless otherwise noted)
.050 .0625 .063 2
.083 .100 .125 4
.167 .200 .250 .375 .500 .800 1.00 2.00
3/16 X  
1/4 X X X X  
XC3700  5/16 X X X X  
3/8 X X X X X X X X X X     
XC5000  7/16 X X X  
1/2 X X X X X X X  
XC6200 5/8 X X X X X X  
XC7500  3/4 X X X X X X X
XC10000 1 X X X X X X  

XC Advanced Specifications (V-Thread):

Model Dia. Lead (inch, unless otherwise noted)
.0125 .0208 .0250 .0278 .0313 .0357 1 mm .0417
6 mm          X
1/4 in X X X X X X      X

XC Advanced Anti-Backlash Highlights:

  • Most advanced Anti-Backlash nut design
  • ActiveCAM® automatically adjusts for wear insuring zero backlash for the life of the nut  
  • High axial stiffness, zero backlash, minimum drag torque
  • Less susceptible to particulate contamination compared to ball scews

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.

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