Page 720 - Master Catalog 2017, Inch

Technical Information
Threading Infeed Tables

NPT Thread, External, and Internal Machining BSPT Thread, External, and Internal Machining

TPI 27 18 14 11.5 8 TPI 28 19 14 11
T Ap 0.030 0.044 0.056 0.068 0.098 T Ap 0.023 0.034 0.046 0.057

N Ap 6 8 10 12 14 N Ap 5 8 10 12
values for fl ank infeed (X/Z) values for fl ank infeed (X/Z)
order order
of passes X/Z X/Z X/Z X/Z X/Z of passes X/Z X/Z X/Z X/Z
1 0.0073 0.0091 0.0102 0.0112 0.0149 1 0.0063 0.0070 0.0084 0.0094
2 0.0061 0.0075 0.0084 0.0093 0.0123 2 0.0052 0.0058 0.0069 0.0078
3 0.0056 0.0069 0.0077 0.0085 0.0113 3 0.0048 0.0053 0.0064 0.0071
4 0.0043 0.0053 0.0059 0.0065 0.0086 4 0.0037 0.0041 0.0049 0.0055
5 0.0036 0.0045 0.0050 0.0055 0.0073 5 0.0031 0.0034 0.0041 0.0046
6 0.0032 0.0039 0.0044 0.0048 0.0064 6 0.0030 0.0036 0.0041
7 0.0035 0.0040 0.0044 0.0058 7 0.0027 0.0033 0.0037
8 0.0033 0.0037 0.0040 0.0053 8 0.0025 0.0030 0.0034
9 0.0034 0.0037 0.0050 9 0.0028 0.0031
10 0.0032 0.0035 0.0047 10 0.0026 0.0029
11 0.0033 0.0044 11 0.0028
12 0.0032 0.0042 12 0.0027
13 0.0040 13
14 0.0038 14
15 15
16 16
T Ap 0.030 0.044 0.056 0.068 0.098 T Ap 0.023 0.034 0.046 0.057
NOTE: Always allow .003–.005" extra stock for full profi le inserts.
Trapezoid Thread to DIN 103, Round Thread to DIN 405,
External, and Internal Machining External, and Internal Machining
pitch 1.50 2.00 3.00 4.00 5.00 pitch 10 8 6
T Ap 0.040 0.049 0.069 0.089 0.108 T Ap 0.052 0.064 0.085

N Ap 6 8 10 12 14 N Ap 8 10 12
values for fl ank infeed (X/Z) values for fl ank infeed (X/Z)
order order
of passes X/Z X/Z X/Z X/Z X/Z of passes X/Z X/Z X/Z
1 0.0098 0.0101 0.0126 0.0147 0.0164 1 0.0108 0.0117 0.0140
2 0.0081 0.0084 0.0104 0.0121 0.0135 2 0.0089 0.0096 0.0116
3 0.0074 0.0077 0.0095 0.0111 0.0124 3 0.0081 0.0088 0.0106
4 0.0057 0.0059 0.0073 0.0085 0.0095 4 0.0062 0.0068 0.0081
5 0.0048 0.0050 0.0062 0.0072 0.0080 5 0.0053 0.0057 0.0069
6 0.0042 0.0044 0.0054 0.0063 0.0071 6 0.0046 0.0050 0.0061
7 0.0040 0.0049 0.0057 0.0064 7 0.0042 0.0046 0.0055
8 0.0036 0.0045 0.0053 0.0059 8 0.0039 0.0042 0.0050
9 0.0042 0.0049 0.0055 9 0.0039 0.0047
10 0.0039 0.0046 0.0051 10 0.0037 0.0044
11 0.0044 0.0049 11 0.0042
12 0.0041 0.0046 12 0.0040
13 0.0044 13
14 0.0042 14
15 15
16 16
T Ap 0.040 0.049 0.069 0.089 0.108 T Ap 0.052 0.064 0.085
NOTE: Always allow .003–.005" extra stock for full profi le inserts. NOTE: Always allow .003–.005" extra stock for full profi le inserts.
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