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Lathe belt broken

Gates 710 belt for a 9x20 lathe

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ROBERT BLACKSHAW24/05/2016 18:05:09
46 forum posts
13 photos

I have again broken a belt on the lathe, Gates 710 is the size. Has anybody know of a distributor of these belts, I have been paying around £23.00 for them, and its getting rather expensive.

Thanks for any replies

mick H24/05/2016 18:21:40
701 forum posts
21 photos

I presume that it is from a 920 lathe? If so, Chester Machine Tools wll be able to assist although I don't know their current price. Apparently these belts come from the US but even so the price is outrageous.

Mick

I have just found a 5M710 (920 lathe) at http://www.bearingshopuk.co.uk/5m710-gates-polyflex-belt/ for about £16 and there are some on EBay, from Denmark at around a tenner.

Edited By mick H on 24/05/2016 18:26:43

Edited By mick H on 24/05/2016 18:27:14

Edited By mick H on 24/05/2016 18:33:27

Chris Shelton24/05/2016 18:23:34
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81 forum posts
46 photos

Hi

Quality bearings online have a Gates Z710 for £4.76 inc vat.

HTH

JasonB24/05/2016 18:35:58
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Moderator
16530 forum posts
1759 photos
1 articles

I have used bearingshopuk as above for a spare for my lathe, seemed about the best price for the 5M series polyflex belts.

Question is why do your skeep breaking?

Roger Provins 224/05/2016 18:36:45
342 forum posts

The Quality Bearings belt is a remarkable low price!

Robert,

To stop breaking the belt reduce the tension on that massive spring. I put 1" loop made from 1/8" welding rod between the fixing point and the end of the spring. Haven't broken a belt since.

Roger

John Rudd24/05/2016 19:00:18
1366 forum posts
58 photos

Robert,

You have a private message..

the artfull-codger24/05/2016 19:28:15
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241 forum posts

The belt for my lathe cost me £150 to get made up a couple of yrs ago, [a flat belt for a colchester student,] it's a real good quality triple laminated one so it'll see me out, & I hinged the motor platform & made a rise & fall mechanism similar to a traction engine reverse lever to create a clutch [a real colchester failing not to have a clutch] my old edgwick had a similar mechanism fitted.

Graham.

ROBERT BLACKSHAW24/05/2016 19:42:28
46 forum posts
13 photos

The reason I am breaking the belt is that I get so involved in what Im doing that I forget to move the lever, I shall try the 1nch loop from Roger, thanks.

John Weight24/05/2016 20:02:50
54 forum posts
14 photos

Hi Robert,

Bearingboys also do them but including postage they still work out at over £ 21 ea. Whilst I am on here, the trouble I have on the 918 lathe is that, on the lowest speed the belt turns over in its v groove when the lathe is running and then eventually becomes very misshapen, any one any suggestions?

Roger Provins 224/05/2016 20:05:22
342 forum posts

Sounds like the pulleys are out of alignment.

John Rudd24/05/2016 20:07:31
1366 forum posts
58 photos

Robert,

The 'inbox' icon at the top of the page will be flashing indicating you have a new message, click on it to view

John Reese24/05/2016 22:15:04
799 forum posts

Anything sold as a repair part has an outrageous markup. If you can buy from a vendor that deals in belts, pulleys, bearings, etc. you will probably get a better price.

Russell Eberhardt28/05/2016 14:02:34
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2497 forum posts
85 photos

I had a 9x20 lathe for a few years. I bought a spare belt from Chester at what I thought at the time was an excessive price but never had to use it. For such a thin belt they are remarkably robust if used correctly. Sorry the spare belt went with the lathe when it was sold.

Russell.

Aeronut28/05/2016 23:49:10
18 forum posts
39 photos

Hi Robert, don't know where you're at but I got mine from city seals and bearings in Rotherham some years ago £12 for 2. for the 5m type this was for a warco 918 which I believe is a similar machine.

Regards Lee

BOB BLACKSHAW19/11/2019 10:01:01
235 forum posts
51 photos

Old thread but still splitting the belt.

I have put a three phase on the machine two years ago and in that time I have gone through three belts, so its not the sudden start off of the motor.

When changing the belt I push off the belt on to the other pully and its quite tight so its not loose. I don't use the tensioner at all as all the pully positions are a good belt tension.

The pulleys are all lined up, as I used a straight edge when setting up the three phase.

The only problem I see is changing to another pully, its pushing the belt over the pully wheel which could be damaging the belt over a period of time. If I left the belt on one pully I'm

sure it would last.

The belt turns over on its self on the pully, and that's when it cracks up .

Any suggestions please, as I've gone trough a number of belts since I had the lathe.

Thanks Bob

Michael Gilligan19/11/2019 10:15:45
avatar
14244 forum posts
627 photos

This [from the horse’s mouth] might help, Bob : **LINK**

https://www.gatestechzone.com/en/problem-diagnosis/synchronous-drive-system

MichaelG.

BOB BLACKSHAW19/11/2019 11:16:22
235 forum posts
51 photos

dscn1145.jpgThanks Michael,

Ive looked at the photos and its non of those, mine has a complete split.

The photo is rubbish , cant get close for a good photo.

Dave Halford19/11/2019 11:59:01
489 forum posts
4 photos

Bob,

Have you tried searching for vee belt rolling on google?

Your pushing the belt off under tension might be damaging that tiny belt an A section would not allow changing pulley under proper tension..

Pulleys might have been made to Chinese guide lines and may not have the correct angle for that belt, or the belt may be bottoming.

Michael Gilligan19/11/2019 13:11:49
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14244 forum posts
627 photos
Posted by BOB BLACKSHAW on 19/11/2019 11:16:22:

Thanks Michael,

Ive looked at the photos and its non of those, mine has a complete split.

The photo is rubbish , cant get close for a good photo.

.

My apologies, Bob

... at the price quoted, I wrongly assumed that it was a Gates timing belt you were breaking.

Please ignore my input.

MichaelG.

peak419/11/2019 13:13:21
avatar
901 forum posts
85 photos
Posted by BOB BLACKSHAW on 19/11/2019 10:01:01:

......................

When changing the belt I push off the belt on to the other pully and its quite tight so its not loose. I don't use the tensioner at all as all the pully positions are a good belt tension.

The pulleys are all lined up, as I used a straight edge when setting up the three phase.

The only problem I see is changing to another pully, its pushing the belt over the pully wheel which could be damaging the belt over a period of time. If I left the belt on one pully I'm sure it would last.

The belt turns over on its self on the pully, and that's when it cracks up .

Any suggestions please, as I've gone trough a number of belts since I had the lathe.

Thanks Bob

Bob, I might be missing the blindingly obvious, since I've never used one of these lathes; surely the whole purpose of the belt tensioner is to release the tension, in order to change speeds.

Isn't it a spring loaded idler?
See Page 20 of this pdf.

Apologies if I'm sucking eggs up the wrong tree, or something like that.

Bill

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