| Gallery, Projects and General > How do I?? |
| Locking a screw thread? |
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| John Hill:
I am building my cnc router table to use roller chain drive for the long axis and there is a need to anchor screwed bicycle sprockets to shafts. The thread is 1.37" 24tpi. The shaft will reverse in operation and I really, really, do not want these sprockets to come unscrewed, what suggestions can I have please? Thanks |
| NeoTech:
Make a collet with set screws that goes in to the thread, or try to create two jam nuts? |
| awemawson:
Bore the thread off, and either weld or loctite a suitable hub for your shaft |
| chipenter:
For a fixed wheel sprocket there used to be a locking ring available , if not turn down another sprocket as a lock ring . |
| RussellT:
In my experience it's a waste of time trying to bore the thread off or trying to turn another sprocket down. They're very hard. Make a plain unthreaded close fitting hub and weld the sprocket on. Take your choice of how to fix the hub. Russell |
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