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USER GUIDE
SOLID CARBIDE DRILLS

Regrinding Instructions for SCDT GYRO Auxiliary Devices for Lathe Machines
Pre-Thread Solid Drills
For each grinding operation, rotate the drill Designed to Correct Misalignment
on Stationary Operation
180° and repeat the grinding procedure. Drills can be used on sloped surfaces up to 6°.
When drilling sloped surfaces of more than 6°,
reduce feed by 30-50% during penetration of
45° up to .2” depth, or use a spot or pre-hole drill to
7°ÊspiralÊrelief avoid drill deviation or poor drill performance.

1 Primary Clearance T.I.R. max. .0008

a° D Range
7 .031-.236
10 >.236

2 Secondary Clearance Angular Adj. 1°

Radial Adj. D.08

3 Chisel

a° D Range
100 .031-.189
105 .190-.394
95 .395-.787

4 Edge Preparation

R D Range
.0008” .031-.236
.0012” .237-.708
.0016” .709>UP
Grinding Wheel Recommended Specifications:
1 Diameter grinding wheel: GA2
2 Grinding wheel bond: synthetic resin
3 Grit size: 325/400 mesh (45/38µ)
4 Diamond concentration: C-75 (3.3 carat/cm )
3
5 Cutting fluid emulsion 3%

234 ISCAR