Ball Screw Repair, Rebuilding and Regrinding

First check that backlash is in the screw, not the supports, coupling or nut housing: tighten the BK lock nut, coupling clamps and housing bolts. If the nut itself has play, the fix is to restore preload by refitting oversize balls or adjusting a double nut, which is a workshop job. Controller backlash compensation hides small play but does not cure wear.

Replace rather than repair when raceways are deeply pitted or flaked along much of the length, the shaft is bent beyond straightening, or the repair cost approaches a new screw's price. Short, low-cost router screws are often cheaper to replace; long or precision ground screws are usually worth rebuilding.

Common warning signs that a CNC ball screw needs repair include excessive axis backlash, position loss during high-precision cutting, unusual metallic grinding noises, high motor load alarms, or visible pitting along the ground thread raceways. Prompt repair prevents complete drive lockup and safeguards machine guide rails.

Standard ball screw inspection, ball nut repacking, and preload adjustments are completed within 24 to 48 hours at TriQuench India. Comprehensive shaft regrinding, custom ball nut replacement, or end support journal rebuilding takes between 3 to 5 business days, followed by laser interferometer pitch calibration to verify precision tolerances before dispatch.

TriQuench India repairs precision ground and rolled ball screws for VMCs, HMCs, CNC lathes, laser cutting machines, and high-speed CNC routers. We service all leading global brands including THK, HIWIN, NSK, PMI, TBI Motion, Bosch Rexroth, Star, and Kuroda, restoring original pitch accuracy and rigidity.

All repaired recirculating ball screw assemblies undergo pitch error inspection, dynamic torque testing, and laser interferometer calibration to guarantee C3/C5 ISO precision standards with zero lost motion (sub-3 micron run-out). Every repair includes a formal metrology report and a 6-month operational warranty.