End Mill Depth


Composition, rigidity, and size of the end mill greatly influence end mill deflection.
Rule of thumb for depth of cut Standard Length of Cut for 2,3 and 4 Fute End Mills
End Mill
Size
Minimum
Corner Radius
Maximum
Depth of cut
End Mill
Size
Stub Regular Long Extra
Long
.0625 .0313 .218 .0625 .093 .218 - -
.125 .0625 .500 .125 .1875 .375 .750 -
.1875 .093 .750 .1875 .281 .500 1.00 -
.250 .125 1.00 .250 .375 .625 1.250 1.750
.375 .1875 1.250 .375 .562 .750 1.50 2.50
.500 .250 1.625 .500 .750 1.250 2.00 3.00
.750 .375 2.00 .750 1.00 1.625 2.00-3.00 4.00
1.00 .500 4.00 1.00 1.00 2.00 2.00-4.00 4.00-6.00