| The Craftmans Shop > New from Old |
| 4x6 Rebuild |
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| jcs0001:
Sparky: Great job with limited tooling. I'm sure lots of us experience that - insufficient tooling or too small to do what we want. I look forward to your ideas for a stand - mine has the flimsy sheet metal stand and I haven't got around to doing anything about it. John. |
| awemawson:
To get the correct form for your wormwheel you should gash it as you have but not to full depth, then hob it with a facsimile of the worm that has axial gashes to form cutting edges. The wormwheel needs to end up shaped like a diabalo so that it partly envelopes the worm. A piece of silver steel turned to the shape of your worm, gashed and then hardened would be quite sufficient. |
| sparky961:
--- Quote from: awemawson on January 11, 2012, 03:36:41 PM ---To get the correct form for your wormwheel you should gash it as you have but not to full depth, then hob it with a facsimile of the worm that has axial gashes to form cutting edges. (snip) --- End quote --- Ya, I know I'm cheating a bit with the way I did it. :) I took more of a "make it work" approach and mostly copied what was already in there. I'm not sure if the pictures show it clearly enough, but the mangled one from the factory was cut similar to the way I did it but with a smaller diameter cutter. It looks like they entered the work from the side so that the space between teeth would be contoured a bit. I knew that it wouldn't mesh perfectly, but considering the application I think quite a bit of slop would be more than acceptable. Some day when I'm making something that needs the accuracy, I definitely want to try hobbing the worm wheel as you've described. -Sparky |
| Andrew_D:
Since you are redesigning the stand anyways, this would be a good time to incorporate a coolant system... Andrew |
| ETC57:
Great build Sparky! :thumbup: Looking forward to your next update!! :clap: :clap: :clap: Jerry. :beer: |
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