Sterling Twist Drill Grinder
(Click here to download the PDF version)

Capacity:
  • Sharpens 1/8" to 2-1/2" diameter drills. 1/8" to 3" calibration available.


    • Versatility:
  • Sharpens 2, 3, or 4 flute drills with
    variable included angles of 90º, 100º,
    110º, 118º, 130º, and 140º.


    • Precision:
  • For accurately centered and free cutting drills in seconds.


    • Simplicity:
  • NO chucks, NO collets, and NO wrenches to bother with when sharpening different diameter drills. The same drill holding unit handles all drills from 1/8" to 2-1/2" in diameter.


    • Unmatched Capacity:
  • The STERLING Drill Grinder is the only grinder capable of sharpening drills from 1/8" to 2-1/2" in diameter. It will accomodate any standard catalog drill within this size range without the hassle of using chucks, collets or wrenches.


    • Extra Versatility:
  • The STERLING Drill Grinder will sharpen 2, 3, and 4-flute drills with 90º to 140º included angles.


    • Standard Equipment:
  • Flexible work light permanently mounted
  • Diamond wheel dresser with mounted diamond
  • 45º, 50º, 55º, 59º, 65º, and 70º drill stops
  • 6" straight cup wheel, 70 grit, aluminum oxide (46 and 60 grit also available)
  • Micrometer Head for accurate control of drill infeed
  • 3/4 H.P., 3450 RPM, 115-volt, single phase, 60 cycle, NEMA C flange mount, totally enclosed fan-cooled, ball bearing motor


    • Optional Equipment:
  • Mist Coolant System improves grinding accuracy and finish
  • Silicon Carbide (60 and 120 grit) Grinding Wheels
  • 3" drill diameter calibration
  • 220/440-volt 3-phase motor and tropicalized motors (1-phase standard)


    • Instructions for Re-Calibration of Clearance Dial:
  • Take a properly-ground 1" drill. Adjust the scale to 1" and, without the spindle motor running, move the drill holder until the drill point contacts the wheel face.
  • Adjust the dial hand wheel until the drill can be swung through the entire grinding arc while maintaining contact with the wheel face.
  • When this has been accomplished, loosen the jam nut on the circular rack (#DB12D) and turn the circular rack using a screw driver in the slot provided until the dial pointer is in the proper position at the 1" mark. Tighten the jam nut.


    • If this process has been done correctly, the machine is now in proper calibration.