NACHI-FUJIKOSHI CORP.

1.Cutting examination with the fly tool

Steel Grade	Cutting length	Average cutting length at the crater depth 0.1mm	Ranking of properties
HS53M		6.09	1
HM36		5.79	2
HM35		5.38	3

(note)
White bar chart: cutting length up to crater depth 0.1mm.
Black bar chart: In cut length up to the depth 0.13mm in different cutting condition,
Those are spcified by the orthogonal polinomials.

Cutting condition Use a fly tool with hobbing machine

Cutting material	S45C(HB183187)
Cutting speed	86.9m/min(187rpm)
Feed	1.5min/rev
Depth of cut	3mm
Cutting fluid	HS4M(Water insolution, Idemitsu)
Cutting method	Climb cut

2.Cutting of the high hardness gear in hob