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Myford Super 7 motor mounting

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Stephen Osborne26/02/2019 09:53:04
14 forum posts

My elderly Super 7 has had an intermittently noisy motor for some time. Recent investigation has located the noise to the resilient motor mounting. The rubber bushes inside the fixing clamps have become perished and degraded by oil contact.

Could any of you Myford experts suggest:

a) Where I could obtain replacement bushes, or

b) A modification to the mount to allow the continued use of the original motor.

I have a well equipped workshop including mig welder and enjoy a challenge!

Many thanks in advance

V8Eng26/02/2019 10:09:34
1270 forum posts
27 photos

I remember this company was suggested by somebody else in a recent thread on here.

Try here.

**LINK**

Edited By V8Eng on 26/02/2019 10:10:26

Edited By V8Eng on 26/02/2019 10:10:50

Clive Brown 126/02/2019 10:13:18
228 forum posts
6 photos

Years ago I repaired a pair of resilient motor mounts for a Myford lathe by moulding using Devcon Flexane. Lasted very well but it's expensive to buy a retail quantity.

Howard Lewis26/02/2019 16:39:27
1917 forum posts
2 photos

There is probably an ideal Shore hardness for the rubbers to isolate a motor running on 50 Hz, (or for 60Hz in USA), to minimise noise transmission.

I replaced the failed moulded rubber on one end of a single phase motor with a strip cut from a commercial vehicle inner tube, with no apparent problems. Beginner's luck probably, But where needs must, and all that!

Howard

john fletcher 126/02/2019 16:54:27
502 forum posts

I had a similar problem some years ago and went to a Motor Factors ( car parts/bits) and they had some thing very close to what I took along as a pattern, but was fitted some where on a motor car. With a bit a wriggling and fettling it fitted OK ,that was at least 10 years ago and is still going strong. John

roy entwistle26/02/2019 17:00:10
966 forum posts

John

Probably a grommet used to hold exhaust parts

Roy

Don Cox26/02/2019 23:28:28
29 forum posts

Four of these?

https://www.ebay.co.uk/itm/Classic-Car-Exhaust-Rubber-Mounting-Bobbin-Cotton-Reel-MG-Mini-etc-GEX7251/192810543186?hash=item2ce4676852:g:Q40AAOSwEUdcUxst:rk:4f:0

Stephen Osborne27/02/2019 09:58:46
14 forum posts

Gentlemen

Thank you all for your most helpful suggestions. If and when I manage to effect a repair, I will post details.

Many thanks, Steve

Howard Lewis28/02/2019 16:35:10
1917 forum posts
2 photos

For anyone thinking of using rubber mounts, the rubber, ideally, should be in shear. In tension, failure is likely to follow. Exhaust mounting "rings" are usually oversized, to minimise the tensile stress, but they do fail.

Engine mounts, in shear, fail much less frequently, if at all, as long as they free of oil.

Howard

Stephen Osborne19/03/2019 10:21:37
14 forum posts

Problem solved.

Many thanks to V8Eng for putting me in touch with Remco. Very helpful in suggesting modifying one of their stock rubber resilient mounts.

My CP motor has 9 sided caps that fit into the rubber mount, Remco could only supply a 6 sided mount. However, there was enough thickness of rubber on this mount to allow cutting out a 9 sided hole with the use of a Stanley knife.

Result - super quiet motor. Many thanks to all.

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