Каталог Iscar монолитные сверла 2022 - страница 22

• For user guide, see pages 175-184

(1) Up to 50% of this length may be used to regrind

Recommended Drilling Procedure

for Deep Hole Drilling (20XD) 1

1 Drill a pilot hole 1-2*D deep with a short drill. The pilot

drill should be 0.03-0.05 mm larger than the long drill

and its point angle should also be larger (over 140°). 2

2 Enter the pre-hole using low speed and

feed, until it engages the material.

3 Increase cutting speed and feed to recommended 3

conditions – no pecking is required!

4 After having reached the required depth, reduce speed

by more than 50% while retracting from the hole.

4

Recommended Machining Conditions for Solid Carbide 20xD Drills