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| Harrison L5 change gears |
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| slowcoach:
Hi all, does anyone out there know what changes gears are required on a Harrison L5 to cut a 6tpi thread. I have no gear chart on the lathe to guide me :scratch: hence the plea. :thumbup: Rob |
| mklotz:
I'm not familiar with the lathe but, assuming it has an Imperial leadscrew, it should be easy to puzzle out the required ratio. Say the leadscrew has a pitch of N tpi. One revolution of the LS will move the carriage 1/N inches. To cut a 6 tpi thread, you need to have it move 1/6 of an inch for each revolution of the spindle. Thus the spindle to leadscrew ratio needs to be N/6. Any set of gears that yields this ratio should do the trick. |
| Darren:
There are a couple of downloads here http://www.lathes.co.uk/latheparts/page14.html that will serve you better than the original charts ... :ddb: Select the download suitable for your lathe and away you go .... :thumbup: |
| slowcoach:
Thanks guys, I will have a go at that. :thumbup: Rob |
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