Deep Hole Drilling into Crank Shaft out of 38MnVs6 with  KOMET  KUB®  Drillmax XL 27×D, Solid Carbide Drill

Challenge

Material:
Steel 38MnVs6

Part:
Crank shaft
Drill hole:
Ø4,0 (0.157“), 110 mm (4,33“) long

Pecularity:
Operation runs with MQL

Previously:
Competitor‘s tool achieved tool life of 1.400 holes

Goal:
Increase tool life to 2.000 holes

KOMET-Solution

KOMET  KUB®  Drillmax XL Ø 4,0 27×D IK TiAlN

Cutting data:

Pilot hole
JEL carbide end mill Ø4,0 NZ2 TiAlN since hole starts on an angle

Deep hole drilling
Entering pilot hole v_c 31 m/min (102 SFM)
f 0,05 mm (.00196“)/rev.

Drilling
v_c 80 m/min (262 SFM), f 0,13 mm (.0051")/rev.

Feed out of the hole
v_c 13 m/min (43 SFM), f 0,13 mm (.0051")/rev.

Customer's Benefit

• Tools life could be increased by 272% to 3.816 holes
• Due the tool life increase we could not only drop the cost/hole but also reduce the down time of the machine since less necessary tool changes