Reduced Shank Drill BitsThe diameter & morse tape corresponding relationship314mmmorse tape 1142523mm:morse tape 223.1-31.75mm: morse tape 332-50.5mm:morse tape 451-76mm: morse tape 577-80mm: morse tape 6The taper corresponding relationship:1: the big end diameter phi 12.065, taper: 1:20.0472: the big end diameter phi 1a7.78, taper: 1:20.0203: the big end diameter phi 23.825, taper: 1:19.9224: the big end diameter phi 31.267 taper: 1:19.2545: the big end diameter phi 44.399 taper: 1:19.002