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Acme Thread
A screw thread having a 29 degree included angle. Used largely for feed and adjusting screws on machine tools.
The Acme thread is easier to machine and is stronger than the square thread.
Number of threads per inch
Depth of thread
[inches]
Width at top of thread
[inches]
Width at bottom of thread
[inches]
Space at top of thread
[inches]
Thickness at root of thread
[inches]
1
0.510
0.371
0.366
0.629
0.635
1
1
/
3
0.385
0.278
0.273
0.472
0.477
2
0.260
0.185
0.180
0.315
0.320
3
0.177
0.124
0.118
0.210
0.215
4
0.135
0.093
0.088
0.157
0.163
5
0.110
0.074
0.069
0.126
0.131
6
0.093
0.062
0.057
0.105
0.110
7
0.081
0.053
0.048
0.090
0.095
8
0.073
0.046
0.041
0.079
0.084
9
0.066
0.041
0.036
0.070
0.075
10
0.060
0.037
0.032
0.063
0.068
Note: all dimensions in the above table are in inches.
See also:
British Association Threads
,
British Standard Whitworth
,
Thread
.
Subjects:
Mechanical Engineering
Science & Engineering Encyclopaedia Version 2.4 © 2001-2010
Dirac Delta Consultants Limited
