General valid tolerances

Basic Tolerance:IT9
Position Tolerance:  Ø 0,1 mm
Surface Roughness RA:*1,6 bis 3,2 µm
Surface Roughness Rz:*15 bis 25 µm
*The roughness values indicated should be considered as reference values, so non-ferrous metals such as titanium and aluminum may often reach values lower than Ra 1.0 µm.

Deep bore holes from Ø 2.5 mm – Drilling with single fluted drills (ELB)
and greater than Ø 18 to Ø 52 BTA deep drilling

Drilling process:0.1 mm / 100 mm drilling depth
Drilling diameter tolerance:IT8 (depending on the material)
Tendency: 0 / -0.03 mm (ELB)
Tendency: 0 / +0.1 mm (BTA)