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Thread cutting on Myford 254
| ray jones 1 | 18/04/2013 12:01:52 |
| 54 forum posts 29 photos | hi, I would appreciate your advice. My Myford 254 is imperial . I needed to to cut 12 tpi. To my surprise ,12 TPI is not listed on the thread cutting chart Both 13TPI and 14TPI are listed, but not 12TPI, The lathe is set up with original thread drive gears see photo of thread setting index any ideas please,. thank you
|
| John Stevenson | 18/04/2013 13:26:46 |
 5068 forum posts 3 photos | Ray, You should have 40 driving an 80 with a 60 idler. Swap the 60 and 80 over so it's a 40 driving a 60 with 80 in the middle as idler.
Then select B 5 on the gearbox, that will give you 12 tpi.
[edit] C 5 will give you 24, another useful one that's missing. Edited By John Stevenson on 18/04/2013 13:29:45 |
| Ian Hewson | 18/04/2013 17:45:39 |
| 354 forum posts 33 photos | Hi Myfords handbook for the lathe gives the gears for threads from 4 to 42 per inch.
PM me if you would like a copy. Ian |
| ray jones 1 | 19/04/2013 19:11:37 |
| 54 forum posts 29 photos | Thank you for the constructive replies, very much appreciated. |
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