BallFinishNose – Crank Shaft – AH715


The conventional product used a solid ball end mill for chamfering the holes in the crankshaft.
Due to the large chamfer width of 1.2 mm, chatter easily occurred in this process. For this process, we proposed a two-flute insert-type ball end mill.
The reduction in the number of flutes from four in the conventional product to two helped suppress the occurrence of chatter. Additionally, the switch to an insert-type tool reduced the unit price of the tool, cutting tool costs in half.

Industry Automotive
Component Crank Shaft
Material ISO code P - SteelP - Steel
Work material S45C/C45
Machine(spindle type) Vertical Machining Center Small(#30,HSK40)
Tool family Milling
Tool category Chamfering
Product name BallFinishNose
TSR No. 5034M
Crank Shaft


Tungaloy Competitor
Body EBFM12S12S110 Solid ball endmill
Effective number of teeth 2 4
Cutting diameter 12 12
Insert ZFBM120R00MJ
Number of cutting edges 1 1
Grade AH710 PVD

Cutting conditions

Tungaloy Competitor
Cutting speed V/c (mm/min) 40 27
Feed per tooth f/z (mm/t) 0.04 0.026
Feed speed Vf (mm/min) 85 75
Depth of cut ap (mm) 1.5 1.5
Coolant Dry Dry


Productivity1.1 times

Tool cost50% reduced