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Yet again! Metric screwcutting myford super 7

Metric threads myford AGAIN!

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David Crisp 1	30/09/2016 19:24:02
5 forum posts	I am lucky enough to have 2 super 7's and other lathes however "she".... Wants the stable back so I need to get rid of one of the myfords. I am about to start metric thread cutting and will rarely need to cut any other. One myford has a gearbox the other does not. I can't decide which to sell. When I first bought one I believed "gearbox must be better" however now I will be practically 100 metric I can't decide. Buy the conversion kit, or a set of gears (well, the 2 I haven't got). What would others do?
Brian H	30/09/2016 20:11:19
2312 forum posts 112 photos	I'd use Imperial!
Roderick Jenkins	30/09/2016 20:30:23
2376 forum posts 800 photos	If you can live with these "approximate" metric pitches then I would stick with the gearbox and buy the 33 and 34 tooth gears. At least it makes selecting fine feed much easier than having to set up a gear train. HTH, Rod
John Stevenson	30/09/2016 21:21:13
5068 forum posts 3 photos	And just by a fluke I have just finished a batch of the 33/34's
David Crisp 1	30/09/2016 21:29:13
5 forum posts	Brilliant gentlemen. Thank you. There was no way I was going to make a decision as I find it almost impossible to decide things like that. I did search for charts like that and couldn't find them, also aprogram called boxfthreadp to see if that would help me decide without finding it. Yes Rod. Those tolerances are certainly close enough. I can't imagine running any threads long enough for it to matter. Now to clean up and advertise the standard super 7! Thanks again. David.
Neil Lickfold	01/10/2016 02:43:49
1025 forum posts 204 photos	Thanks for the thread charts Rod. Neil
fizzy	01/10/2016 09:16:25
1860 forum posts 121 photos	Rod - thanks for these, if M6x1 is coarse then what is M5x1.25? Pretty sure this is what I regularly use.
Muzzer	01/10/2016 09:21:26
2904 forum posts 448 photos	fizzy - check it against this table. Where did you get that from?
Nick Hughes	01/10/2016 10:07:22
307 forum posts 150 photos	Another set of charts from a previous posting:- LINK
David C	07/10/2016 09:26:21
21 forum posts 15 photos	Thank you all. Gears arrived and all brilliant. Now I just need to convince her she does not need horse number 4 as much as I need two Myfords (which I know I don't really) but it's always handy to keep a spare.
John Haine	07/10/2016 09:48:30
5563 forum posts 322 photos	Could you harness Horse #4 to power one of the Myfords when the lights go out this winter? 1 HP is probably a nice amount to have...
Swarf, Mostly!	07/10/2016 10:06:49
753 forum posts 80 photos	Posted by John Haine on 07/10/2016 09:48:30: Could you harness Horse #4 to power one of the Myfords when the lights go out this winter? 1 HP is probably a nice amount to have... I think it was Laurence (Lawrence ? ) Sparey who wrote 'much of the work we amateurs do on our ML7s is really too large for the machine'. Your post had me wondering about the set-up required to turn the rims of a horse-sized treadmill! Best regards, Swarf, Mostly!
KWIL	07/10/2016 10:24:40
3681 forum posts 70 photos	If you keep the Myfords they will cost you nothing, if you keep yet another horse, feed, vet's bills, farrier.........
John Stevenson	07/10/2016 11:26:29
5068 forum posts 3 photos	My brothers wife keeps horses and when I see one walking round the field, all I can see is 846 tins of glue
David Crisp 1	18/10/2016 11:53:21
5 forum posts	She got another field shelter and 3 new stables!!!! I see horsemeat on Christmas day!

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