J350G CNC Jig Grinder Offers Flexibility, Accuracy and Operator-Friendly Operation

It features a U-axis range of -3mm to +50mm relative to the spindle center.

J350 G
Mitsui Seiki

Mitsui Seiki (Franklin Lakes, NJ) announced its J350G jig grinder, which offers a combination of application flexibility, accuracy, reliability and operator-friendly operation.


  • U-axis range of -3mm to +50mm relative to spindle center
  • Fanuc 31i-B control has 15" touch panel LCD screen and is preloaded with G-MAPS conversational-style programming software
  • Ability to grind variety of features automatically without changing wheels
  • X- and Y-axes that are hand scraped and incorporate needle roller bearings
  • V-F flat shaped left and right slide ways
  • V-V shaped Y-axis (spindle head motion)
  • Thick, highly rigid casting supported by three level points
  • Built-in, custom-designed Heidenhain scales that contribute to +/- 0.0007mm accuracy on the X-, Y- and Z-axes
  • Table longitudinal travel (X-axis): 500mm
  • Transverse travel (Y-axis): 300mm
  • Quill travel (Z-axis): 100mm
  • Maximum distance from table surface to grinding spindle nose: 450mm
  • Work surface: 700mm x 350mm
  • Permissible table load: 300kg
  • Table and saddle maximum rapid feed rates: 2,000 mm/min
  • Grinding feed rates: variable from 0.1mm/min to 2,000 mm/min
  • Standard high-frequency spindle motor operates from 9,000 rpm – 45,000 rpm
  • Variety of spindle motor options that include air-turbine motor with 75,000 rpm capability
  • 2,220mm x 2,610mm footprint


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