11 .1 under cut and thr ead p a ra met ers – HEIDENHAIN CNC Pilot 4290 User Manual
Page 442
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11 Tables and overviews
430
Q=9 CylindricalWhitworth thread
Thread
diameter
Thread
designation
(in mm)
pitch
1/4“
6.35
1.27
5/16“
7.938
1.411
3/8“
9.525
1.588
7/16“
11.113
1.814
1/2“
12.7
2.117
5/8“
15.876
2.309
3/4“
19.051
2.54
7/8“
22.226
2.822
1“
25.401
3.175
1 1/8“
28.576
3.629
1 1/4“
31.751
3.629
1 3/8“
34.926
4.233
1 1/2“
38.101
4.233
1 5/8“
41.277
5.08
1 3/4“
44.452
5.08
1 7/8“
47.627
5.645
2“
50.802
5.645
2 1/4“
57.152
6.35
2 1/2“
63.502
6.35
2 3/4“
69.853
7.257
Q=11 Whitworth pipe thread
Thread
diameter
Thread
designation
(in mm)
pitch
1/8“
9.728
0.907
1/4“
13.157
1.337
3/8“
16.662
1.337
1/2“
20.995
1.814
5/8“
22.911
1.814
3/4“
26.441
1.814
7/8“
30.201
1.814
1“
33.249
2.309
1 1/8“
37.897
2.309
1 1/4“
41.91
2.309
1 3/8“
44.323
2.309
1 1/2“
47.803
2.309
1 3/4“
53.746
2.309
2“
59.614
2.309
2 1/4“
65.71
2.309
2 1/2“
75.184
2.309
2 3/4“
81.534
2.309
3“
87.884
2.309
3 1/4“
93.98
2.309
3 1/2“
100.33
2.309
3 3/4“
106.68
2.309
4“
113.03
2.309
4 1/2“
125.73
2.309
5“
138.43
2.309
5 1/2“
151.13
2.309
6“
163.83
2.309
Q=10 Tapered Whitworth thread
Thread
diameter
Thread
designation
(in mm)
pitch
1/16“
7.723
0.907
1/8“
9.728
0.907
1/4“
13.157
1.337
3/8“
16.662
1.337
1/2“
20.995
1.814
3/4“
26.441
1.814
1“
33.249
2.309
1 1/4“
41.91
2.309
1 1/2“
47.803
2.309
2“
59.614
2.309
2 1/2“
75.184
2.309
3“
87.884
2.309
4“
113.03
2.309
5“
138.43
2.309
6“
163.83
2.309
Continued
11
.1 Under
cut and
Thr
ead P
a
ra
met
ers
Q=13 UNC US coarse thread
Thread
diameter
Thread
designation
(in mm)
pitch
0.073“
1.8542
0.396875
0.086“
2.1844
0.453571428
0.099“
2.5146
0.529166666
0.112“
2.8448
0.635
0.125“
3.175
0.635
0.138“
3.5052
0.79375
0.164“
4.1656
0.79375
0.19“
4.826
1.058333333
0.216“
5.4864
1.058333333