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| Simple threading question |
| << < (2/3) > >> |
| saw:
According to my knowless you should have a diameter 9,3 mm. :smart: |
| andyf:
The tips of the crests of the thread won't contribute much to its strength. In most cases, using slightly undersized stock is OK, and it will make a die easier to turn. Andy |
| Pete.:
The problem for us novices is that if you make the OD too tight you can't test-fit the nut to get an acceptable fit. My last thread I turned the OD about .2mm under nominal then consulted my zeus for the infeed, stuck to that and the nut was just a little tight, so I quickly ran a file over the thread tops to make sure it wasn't tight on the OD - and it was! |
| jim:
here is all the threading information you could possibly need! http://mdmetric.com/thddata.htm#idx |
| AndyB:
Hi Eric, I might get shot down for saying this but I have read that as long as you have over 65% of the thread depth you should be ok. As you have been told, 100% will not go on the bolt. Especially with dies, it is easier to cut less meat off, so it depends on the function of the job in hand; as Ade says, you choose fit for function. Practice is always going to be best before you bugger up the part that counts. It will also give you enormous insight into the problems. Start loose then tighten up. You can adjust dies somewhat with the screws in the holder...but never not use a holder as your dies will soon become thread chasers! :lol: The middle screw inserted to the gap opens the die, the other two close it (first undoing the middle one...). Andy |
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