Thread angle
From Wikipedia, the free encyclopedia
In mechanical engineering, the thread angle of a screw is the included angle between the thread flanks, measured in a plane containing the thread axis.[1] This is a defining factor for the shape of a screw thread. Standard values include:
| Name | Code | Angle | Profile | Standards |
|---|---|---|---|---|
| Most V-threads | M | 60° | File:Spitzgewinde.jpg | including DIN 13 / ISO, NPT and UTS |
| Whitworth threads | W | 55°[2] | File:Whitworth-Gewinde.jpg | DIN 49301 / BS |
| British standard pipe thread | G | 55° | File:Rohrgewinde.jpg | DIN / BS / EN / ISO 228-1 / ISO 7-1 |
| National Pipe Thread | NPT | 60° | File:NPT Dimensions.svg | ASME B1.20.-1983 Pipe Threads, General Purpose, Inch |
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|
Rd | 30° | File:Rundgewinde.jpg[6] | DIN 405 / DIN 20400 |
| Acme thread[7] | 29° | File:Acme thread.svg | ASME/ANSI B1.5-1988Lua error in package.lua at line 80: module 'Module:Footnotes/anchor_id_list' not found. | |
| Metric trapezoidal threads[1] | Tr | 30° | 
|
DIN 103 |
| Buttress threads[7] | S | 45° | 
|
DIN 2781 |
| German buttress threads[7] | S | 30° | 
|
DIN 513 |
| Square threads[1] | Sq | 0° (parallel) | 
|
? |
| Panzergewinde, "steel conduit thread" | Pg | 80° | 
|
DIN 40430 |
| British Association (BA) thread | BA | 47°Template:Nnbsp30' = 47.5° | 
|
BS 93:2008 |
| Löwenherz thread[8] | 53°Template:Nnbsp8' ≈ 53.1° | |||
| Bodmer thread[9] | 50° | |||
| Thury thread[10][11] | 47°Template:Nnbsp30' = 47.5° |
References
Notes
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- ^ a b c Lua error in package.lua at line 80: module 'Module:Footnotes/anchor_id_list' not found..
- ^ BS 84: 1956
- ^ Knuckle Thread DIN 405
- ^ Knuckle Thread DIN 20400
- ^ Bornemann
- ^ Knuckle thread
- ^ a b c Lua error in package.lua at line 80: module 'Module:Footnotes/anchor_id_list' not found..
- ^ Löwenherz thread
- ^ Bodmer thread
- ^ Brooks, Randall C. "Standard Screw Threads for Scientific Instruments. Part 1: Production Techniques and the Filière Suisse." History and Technology, vol 5, 1988, pp. 68.
- ^ Thury thread
Bibliography
- Page Module:Citation/CS1/styles.css has no content.Bhandari, V B (2007), Design of Machine Elements, Tata McGraw-Hill, ISBN 978-0-07-061141-2.
- Page Module:Citation/CS1/styles.css has no content.Oberg, Erik; Jones, Franklin D.; Horton, Holbrook L.; Ryffel, Henry H. (1996), Green, Robert E.; McCauley, Christopher J. (eds.), Machinery's Handbook (25th ed.), New York: Industrial Press, ISBN 978-0-8311-2575-2, OCLC 473691581.
