I particularly enjoy the recent Myford restoration articles

[choochoo_balooParticipant @choochoo_baloo]

Feedback is always helpful, good or bad. As such I wanted to say that a highlight of my MEW subscription over the past 12 months or so have been the few Myford restoration articles by Peter Barker. As a self-taught home machinist, the thorough but unpretentious style bas been very informative. I've had many "oh so now that xx makes sense" reading them!

Niel Wyatt – I know you're a responsive Editor, so I thought it was worth mentioning the above.

I hope more maintenance type articles on the popular brand machines might be included in future editions. I expect they're quite popular. Particularly as COVID restrictions continue to ease.

All in all, a great magazine!

[choochoo_balooParticipant @choochoo_baloo]

[HopperParticipant @hopper]

Thanks. Glad you found the articles useful.

Have fun with your Myford.

Pete B.

[Simon CollierParticipant @simoncollier74340]

I used to resent all the stuff on Myfords in the magazines. Then a very nice Ml 7 fell into my lap for peanuts, so now I like the articles.

[HopperParticipant @hopper]

Posted by Simon Collier on 05/07/2020 23:58:47:

I used to resent all the stuff on Myfords in the magazines. Then a very nice Ml 7 fell into my lap for peanuts, so now I like the articles.

Lol. Ain't that the way of it.

I got mine in a similar way — then found out why it was at close to scrap value price. I got exactly what i paid for!

[Paul TaylorParticipant @paultaylor53031]

Love the Myford restoration Thread.

I'm in Australia and restoring a Super 7 with a 1955 type quick change gearbox with external lead screw drive. I only have the pinion on the lead screw. Can anyone tell me the number of teeth on the gearbox and idler gears please.

An aside. The lathe was owned by author Neville Shuts!

[DC31kParticipant @dc31k]

Posted by Paul Taylor on 20/08/2023 11:20:15:

Can anyone tell me the number of teeth on the gearbox and idler gears please.

There are lots of Myford workshop manuals available for download from here:

http://vintagemachinery.org/mfgindex/detail.aspx?id=4654&tab=3

[Grindstone CowboyParticipant @grindstonecowboy]

Posted by Paul Taylor on 20/08/2023 11:20:15:

Love the Myford restoration Thread.

I'm in Australia and restoring a Super 7 with a 1955 type quick change gearbox with external lead screw drive. I only have the pinion on the lead screw. Can anyone tell me the number of teeth on the gearbox and idler gears please.

An aside. The lathe was owned by author Neville Shuts!

Sorry, can't help with the question, but congratulations on owning a bit of history – one of my favourte authors, Trustee from the Toolroom being amongst his best work.

Rob

[JAParticipant @ja]

Posted by Paul Taylor on 20/08/2023 11:20:15:

Love the Myford restoration Thread.

I'm in Australia and restoring a Super 7 with a 1955 type quick change gearbox with external lead screw drive. I only have the pinion on the lead screw. Can anyone tell me the number of teeth on the gearbox and idler gears please.

An aside. The lathe was owned by author Neville Shuts!

According to my "Myford Super 7 Lathe Notes on Operation Installation and Maintenance also Pictorial Parts List" booklet, Fixed Cluster Gear 210 19/57 teeth, Reversible Cluster Gear 208 19/57 teeth, (Gear on gearbox shaft) 186 72 teeth. The bold numbers are diagram references.

While I think I have answered your question I feel that you may be slightly puzzled. A copy of the relevant pages will follow in a few minutes.

JA

[JAParticipant @ja]

Paul

As promised.

I am sure the quality of pictorial parts lists for Chinese lathes far surpass Myford's.

JA

[Paul TaylorParticipant @paultaylor53031]

Thanks for diagram. The problem is that the 1955 quick change gear box had the lead screw drive externally on the right hand side of the gearbox.

The gearbox drives a pinion.which drives an idler gear which drives a gear on the lead screw.

I have the gear on the leadscrew but don't know the number of teeth on the gearbox drive or idler.

I ha a photo but it's not clear enough to count the teeth.

Cheers Paul

[not done it yetParticipant @notdoneityet]

If you know the gear DP and tooth-count along with the centre to centre distance, the tooth count of the previous/subsequent gears are fairly easily calculated.

Edited By not done it yet on 21/08/2023 07:12:58

[Howard LewisParticipant @howardlewis46836]

Since the changewheels on non gearbox Myfords are 20DP, 14.5 PA, it would seem likely that the same would be used for gears on the QCGB models.

If you want to learn more about the calculations, Ivan law's "Gears and Gear Cutting", No 17 in the Workshop Practice Series will be worth reading.

From this you can calculate the OD, and PCD of each gear, which should confirm the cenre distance.

Howartd

[JasonBModerator @jasonb]

You could also work it out by selecting say 8tpi and rotating the gearbox input by hand and measuring the rotation of the output. You can then calculate the gear ratio needed between box output and leadscrew. eg if one turn of the input = half a turn of the output then you need the leadscrew gear to have half the number of teeth as the output pinion.

Idler will simply be what fits between the PCD of the output and leadcrew gears.

[Nick HughesParticipant @nickhughes97026]

The photo on here is clear enough to count the input gear teeth (I count 18) :-

lathes.co.uk

Also some taken during a rebuild here (about 7 min in):-

YouTube

Edited By Nick Hughes on 21/08/2023 10:52:37

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