Not sure what computer software and printing capabilities you have but it should be possible to work up your own without unreasonable effort. If so the charts shown here :- **LINK**Īre probably correct. I assume you have the standard L5 with three speed feed box rather than the full screwcutting version. He does have charts included to cut metric threads on an imperial lathe that could be adapted to suit the Harrison.Īssuming it has a norton gearbox fitted (some L5’s don’t) You need a 127 tooth wheel to cut metric threads I can't offer any advice on the Harrison but if all else fails you could get yourself a copy of Martin Cleeve's book "Screwcutting in the Lathe" and calculate what gears you need from first principals. I would like to cut metric threads and I have no idea what gears I should be looking for could someone please offer some advise.The information plate inside the gear cover is missing so if anyone could take a photo of there's that would be appreciated.To start I am a complete novice and never turned in the past but I've always wanted to so I bought a Harrison L5 lathe.īecause I'm new to all this I need abit of help with the screw cutting element of the lathe.
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