NPT Thread, External, and BSPT Thread, External, and

Internal Machining Internal Machining

TPI27181411,58TPI28191411
T Ap (mm)0,7621,1181,4221,7272,489T Ap (mm)0,5840,8641,1681,448
N Ap68101214N Ap581012

values for fl ank infeed (X/Z) values for fl ank infeed (X/Z) order order

X/Z X/Z X/Z X/Z X/Z X/Z X/Z X/Z X/Z

of passes of passes

10,1870,2310,2600,2850,37810,1600,1790,2130,239
20,1540,1910,2140,2360,31220,1320,1480,1760,197
30,1410,1750,1960,2160,28630,1210,1350,1610,181
40,1080,1340,1510,1660,21940,0930,1040,1240,139
50,0910,1130,1270,1400,18550,0780,0870,1040,117
60,0800,1000,1120,1230,16360,0770,0920,103
70,0900,1010,1110,14770,0700,0830,093
80,0830,0930,1020,13580,0640,0760,086
90,0870,0950,12690,0710,080
100,0810,0890,118100,0670,075
110,0850,112110,071
120,0800,107120,067
130,10213
140,09814

15 15 16 16

T Ap (mm) 0,762 1,118 1,422 1,727 2,489 T Ap (mm) 0,584 0,864 1,168 1,448

NOTE: Always allow 0,08–0,13mm extra stock for full profi le inserts. Trapezoid Thread to DIN 103, External, Round Thread to DIN 405, External,

and Internal Machining and Internal Machining

pitch1,52345pitch1086
T Ap (mm)1,0161,2451,7532,2612,743T Ap (mm)1,3211,6262,159
N Ap68101214N Ap81012

values for fl ank infeed (X/Z) values for fl ank infeed (X/Z) order order

X/Z X/Z X/Z X/Z X/Z X/Z X/Z X/Z

of passes of passes

10,2490,2580,3200,3730,41710,2730,2970,357
20,2060,2130,2640,3080,34420,2260,2450,294
30,1880,1950,2420,2820,31530,2070,2240,270
40,1440,1500,1860,2170,24240,1590,1720,207
50,1220,1260,1570,1830,20450,1340,1450,174
60,1070,1110,1380,1610,18060,1180,1280,154
70,1000,1250,1450,16270,1070,1160,139
80,0920,1150,1340,14980,0980,1060,128
90,1070,1250,13990,0990,119
100,1000,1170,131100,0930,112
110,1110,123110,106
120,1050,117120,100
130,11213
140,10814

15 15 16 16

T Ap (mm) 1,016 1,245 1,753 2,261 2,743 T Ap (mm) 1,321 1,626 2,159

NOTE: Always allow 0,08–0,13mm extra stock for full profi le inserts. NOTE: Always allow 0,08–0,13mm extra stock for full profi le inserts.