Regrinding Instructions for SCDTGYRO Auxiliary Devices for Lathe Machines
Pre-Thread Solid Drills
Designed to Correct Misalignment
For each grinding operation, rotate the drillon 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 up
45° to 5 mm 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. 0.02

D Range 7 0.8-6.0 10 >6.1 2 Secondary Clearance

Angular Adj. 1°

Radial Adj. D2.0

3 Chisel

D Range
1003.0-4.8
1054.9-10
9510.1-20

4 Edge Preparation

RD Range
0.020.8-6.0
0.036.1-18.0
0.0418.1>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/cm3) 5 Cutting fluid emulsion 3%