Общий каталог Tungaloy 2020 - 2021 - страница 1659

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Drilling Tools B

Technical guidelines C

When to change drill heads (Criteria for the end of tool life)

The criteria to identify the time for tool change are as follows:

- 0.2 P 1.25 P x D

mm 0.3 mm 0.15 + ø > DC Ra ø = DC mm 0.03 - ø < DC

E

Width of corner wearSpindle load exceedsHole diameter is 0.15 mmSurface roughnessVibration or unusual
reaches 0.2 – 0.3 mm.125% of the normal value.larger or 0.03 mm smallerdeteriorates.noise occurs.

than the drill diameter. F How to clamp the drill head

ᆰ Clean and lubricate the pocket. ᆱ Set the drill head into the pocket. Air blast etc. G

H

ᆲ Set the clamping key on the drill headᆳ ClampI
J
K
Coolant supply
Internal coolant supply isThe required coolant flow and pressure
recommended.301.75
1.5L/D = 12
201.25L/D = 8L

L/D = 5 1 10 L/D = 3 0.75

0.5 5 M 0.25

6 12 16 20 26 6 12 16 20 26

Drill diameter: DC (mm) Drill diameter: DC (mm)