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Operating manual for a Harrison 140 metric lathe

Containing how to cut an imperial thread

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Philip Major	12/11/2019 13:25:12
17 forum posts 1 photos	Hi, I am trying to cut a 20 tpi Unf thread on my lathe, anyone got a manual for it , or advice on first principles to work it out, lathe has a 6 cm leads crew Many thanks
DC31k	12/11/2019 14:52:22
1186 forum posts 11 photos	Type 'Harrison 140 imperial threading' into Google. Inter alia, it will find https://www.mig-welding.co.uk/forum/threads/gear-cutter.56392/page-2 and https://www.mig-welding.co.uk/forum/threads/advice-on-lathe-purchase.62989/page-3 These may shed light onto your problem. Most unlikely to have a 6cm leadscrew unless it has come from a dressmaking shop or is ex-Blue Peter.
Philip Major	12/11/2019 20:38:33
17 forum posts 1 photos	Posted by DC31k on 12/11/2019 14:52:22: Type 'Harrison 140 imperial threading' into Google. Inter alia, it will find https://www.mig-welding.co.uk/forum/threads/gear-cutter.56392/page-2 and https://www.mig-welding.co.uk/forum/threads/advice-on-lathe-purchase.62989/page-3 These may shed light onto your problem. Most unlikely to have a 6cm leadscrew unless it has come from a dressmaking shop or is ex-Blue Peter. That will be 6mm then! As you say
Philip Major	13/11/2019 07:38:36
17 forum posts 1 photos	Thanks for this . Answer found on Google as per above post. 3 nice pictures of the settings
norm norton	13/11/2019 10:12:20
202 forum posts 10 photos	These imperial tables for a 140 were all on the Harrison Yahoo forum site, I am sure I put some there, but it is all shut down now by the recent Yahoo policy. There is a new Harrison site and I will have to see if the files of reference data have been transferred across. I will post my simple .jpg of information here in the hope that it is readable. If not message me with your email and I will copy it to you.

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