Oil holes


To reduce the often very long machining time of the deep holes in small diameters with no diameter tolerance (in oil connector holes). In many cases, HSS deep hole drills are still used.



Solid carbide drills with C7 coating ensure increased speed and feed and reduce the cycle time considerably while giving increased lifetime. Very narrow hole tolerances and a completely safe process.


Machining process


Step 1: Pilot drill


Step 1: Pilot drill

Drawing no. 289411.0400, N = 9550 rpm, Fn = 0.2 mm/rev. 



Step 2B: SC deep hole drill


Step 2: Solid carbide deep hole drill

N = 6000 rpm, Fn = 0.3 mm/rev.