Member postings for Jesper Crone

Brian and Simon

With great help from Brian and his book and from Simon an extraordinary friendly assistance getting the missing 16,5T and 17T gear as described above, I'm now making metric threads on my Super 7 with OLD gearbox.

Thanks to everybody for useful comments and assistance

Jesper

Thank you all for the interesting posts - You are really experts.

Brian - I would like to receive your calculations per email; j.crone(at)get2net(dot)dk

Best regards

Jesper

Hello Simon; Thank you for all your efforts.

I did follow your suggestion and made a thread with QC setting 20 TPI - and the pitch is 20 TPI; So far so good. then I just need a bunch of "metric teeth".

Jesper

Thank you very much for all your kind posts; I will get hold on the bible about gearing for screwcutting. I'm pretty sure that the gearbox was delivered with the machine in 1956 as I have both manuals; Lathe publ S.715 dated 56 and gearbox publ 712 dated 56 with the gearing chart as per pictures. BUT I have no extra gears than fitted on the pictures - so I'm much in doubt what I need to buy in order to cut metric screws - and I do not understand the 161/2 teeth gear nor where to buy.

Dear members

40 years has gone since my education as a fine mechanical engineer and also 40 years away from machining I just bought a Myford Super 7 anno 1955-56 (2 years older than me) for making various bits and pieces. First job was to make a nut with an internal thread M62x1,25 for my Arboga Milling machine. Made in Stainless steel all turning and slotting went very well but the pitch wasn't accurate

The super 7 is delivered i July 1956 to Greenland, Serialno SK 4986 with gearbox serialno QC 1942. I just have the fitted gears

From spindle: 30, 30 and 28 fibre, 30T/12T, 57T/19T, 57T/19T, 72T(on the gearbox)

Main priority is metric threads but I also need some inch cutting.

I'm obviously are missing some gears; have read in here about a 33T and 34T but assume it won't fit my machine - or if - where to fit and where to get them

I hope for some useful help - all the best from Jesper in Denmark

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