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HH Roberts Machinery Ltd
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Sterling Twist Drill Grinder

 

The Sterling Drill Grinder is the only grinder capable of sharpening drills from 1/8" to 2 1/2" in diameter. It will accommodate any standard catalog drill within this size range without the hassle of using chucks, collets or wrenches. The Sterling Drill Grinder will sharpen 2, 3 and 4 flute drills with 90 to 140 degree included angles.

 Stirling Floor model drill grinder
Standard Equipment Includes:
  • Flexible worklight permanently mounted.
  • Diamond wheel dresser with mounted diamond.
  • 45, 50, 55, 59, 65,and 70 degree drill stops.
  • 6" straight cup wheel, 70 grit, aluminum oxide (other grits are available).
  • Micrometer head for accurate control of drill infeed.
  • 3/4 H.P. , 3450 RPM, 110/220 volt, single phase, 60 Cycle, NEMA C flange mount, totally enclosed fan cooled, ball bearing motor.
Optional Equipment Includes:
  • Mist coolant system improves grinding accuracy and finish by reducing wheel loading and glazing that can result in poor finish and burned cutting edge.
  • Silicon carbide grinding wheels.
  • 3" drill diameter calibration.
  • 220/240 volt 3 phase motor and tropicalized motors (1 phase standard).
Dressing the stone on the Sterling drill grinder Setting the drill point clearance angle on the sterling drill grinder Sharpening a drill on the sterling drill grinder
Built in diamond dresser Setting the drill point to the clearance angle stop Sharpening
 
The sterling drill grinder can optionally have this spray mist coolant fitted The Sterling drill grinder can drill small bit like this, down to 1/4 inch This is the bench model of the Sterling drill grinder
Spray mist coolant option Grinding a small drill DV bench model
 
The DV vesrion of the Sterling drill grinder has settings for variable point angles An overall view of the Sterling drill grinder with options Thsi shows the micrometer depth stop on the Sterling drill grinder
DV model has variable drill point angle setting Floor model with standard worklight and optional spray mist coolant Showing the micrometer ajdustment for grinding infeed