Maximum Performance CBN Ball Mills for Hardened Steels over 55Rc


The EXOCARB® MAX-CBN end mills are designed exclusively for hard milling when maximum tool life, finish and precision are needed in materials up to 68 HRC. Outlasting even the best carbide substrates with PVD coatings, OSG's CBN mills extend life up to 5X, thereby eliminating start and stop marks on parts caused by tool changes.


Spiral gash

Allows for greater depths of cut

True ground ball with seamless tangency

Reduces cutting friction

5-micron radius tolerance

For finishing precision



List 9181 - Corner Radius View Offering >   View Overview >

List 9182 - Corner Radius, Long Neck View Offering >   View Overview >

List 9191 - Ball End View Offering >   View Overview >

List 9192 - Ball End, Long Neck View Offering >   View Overview >

Application Guide

ISO Work Material Recommended
P Low Carbon Steel : 1010, 1018
P Medium Carbon Steel : 1035, 1045
P High Carbon Steel : 1065
P Alloy Steels : 4140, 4340
P Die Steels
M Stainless Steels : 300
M Stainless Steels : 400
M Stainless Steels : 17-4PH
K Cast Iron
N Aluminum : 6061, 7075
N Aluminum : Casting
S Nickel Alloy : Inconel
S Titanium : 6AL4V (30HRC)
H Hardened Steels : ~35 HRC
H Hardened Steels : 35-45 HRC
H Hardened Steels : 45-50 HRC
H Hardened Steels : 50-70 HRC

good best

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