CNC external thread grinding machine for large parts
max. ø 300 mm | GS:TE-LM 4M
Drake Manufacturing Services
The machine has a cast polymer base with moving wheel head design and no mechanical drives on the principal axes. The wheel in feed (X-axis) and work traverse slide (Z-axis) are driven by linear motors. The work head (C-axis) is driven by a torque motor integral with the spindle and boasts a better than 10 arc seconds index accuracy.
This massive machine for grinding ball screws (and nuts with the internal attachment) operates with no ball screws–truly a "mother" machine tool."
A recent runoff for a customer consisted of grinding a 790 mm ISO Class 0 (lead error of less than +/- 7microns in the length) ball screw as well as a 3.5 meter ISO Class 1 ball screw (lead error of less than +/- 32 microns in the length) both ground in one setup without removing either screw for lead inspection during the grind.
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