Gun Drill Bits
314mm morse tape 1
14.25-23mm: morse tape 2
23.1-31.75mm: morse tape 3
32-50.5mm: morse tape 4
51-76mm: morse tape 5
77-80mm: morse tape 6
The taper corresponding relationship:
1: the big end diameter phi 12.065, taper: 1:20.047
2: the big end diameter phi 17.78, taper: 1:20.020
3: the big end diameter phi 23.825, taper: 1:19.922
4: the big end diameter phi 31.267 taper: 1:19.254
5: the big end diameter phi 44.399 taper: 1:19.002