P

55°

Whitworth (mm)

T.P.I.

Number of28262019181614121110987654.54
PassesRadial in-feed per pass (mm)
10,2030,2030,2030,2290,2290,2030,2540,2790,2790,3050,2790,3050,3560,3560,3810,4060,457
20,1780,1520,2030,2030,2030,2030,2290,2540,2540,2540,2290,2790,3050,3050,3810,4060,432
30,1270,1520,1520,1520,1780,1520,1780,2030,2030,2030,2290,2290,2790,2790,3560,3560,356
40,1020,1020,1270,1270,1520,1520,1520,1780,1780,1780,2030,2030,2290,2540,3050,3050,330
50,0760,0760,1020,1270,1270,1270,1270,1520,1520,1520,1780,1780,2030,2030,2790,2790,330
60,6350,6860,0760,0760,1020,1270,1270,1520,1520,1270,1520,1520,2030,2030,2540,2540,279
70,8640,9140,0760,1020,1020,1270,1270,1270,1520,1520,1780,2030,2290,2290,279
81,0670,0760,0760,0760,1270,1270,1270,1520,1520,1780,2030,2290,254
91,1431,2451,4220,0760,1270,1270,1270,1520,1520,2030,2030,254
101,5490,0760,1270,1270,1520,1520,2030,1780,229
111,6760,0760,1270,1270,1520,1780,1780,203
121,8800,0760,0760,1520,1520,1520,203
132,1082,4130,1270,1270,1520,178
140,1020,1020,1520,152
152,8193,3530,1470,127
160,1020,102

3,708 4,166 Last pass equals total depth of thread.