1-11 Aluminum with Silicon less than 12%
Aluminum Alloys (with Silicon below 12%) and Copper Alloys(Hard Bronze)
40 degree Spiral
Blind Holes
Form C: 2~3 chamfering
Form E: 1.5~2 chamfering
Tolerance: ISO 2-6H
DLC(Diamond) Coating
40 degree Spiral
Blind Holes
Form C: 2~3 chamfering
Form E: 1.5~2 chamfering
Tolerance: ISO 2-6H
DLC(Diamond) Coating
Best Art. No. in normal stock: DIN 371: 4350
DIN376: 6350
JIS B0251/5
Other Art. No. for Best recommendation:
DIN371: Internal Coolant: B4350, Form E: 4351, B4351
DIN376: Internal Coolant: B6350, Form E: 6351, B6351


