lathe belt

[Gordon WParticipant @gordonw]

Can anyone suggest a source for a new belt for my lathe? lathe is a Chester DB8, 3 yrs. old,direct belt drive, ie. not speed controlled motor. Belt is non standard. 15mm wide toothed belt, made from polyurethane ? Tooth pitch measured with steel rule is about 4.5mm, tooth width about 1.5mm. No. of teeth124 (more will be OK) length outside belt 560 mm.thickness over teeth 2mm. I can’t find anything on the web, tried all the belt suppliers. Maybe some other machine uses this belt. Other approach will be convert to a standard belt and pulleys, any one done this? Will be difficult as will only have high range speeds.

[Gordon WParticipant @gordonw]

[wheeltapperParticipant @wheeltapper]

I know this is a completely stupid question but have you asked Chester?

 

Roy

[Steve GarnettParticipant @stevegarnett62550]

You may not even need to go that far. A few minutes’ research reveals that if this is a DB8V, then according to the Chester forum the belt that fits it is a Gates 7M710, and they can be picked up from several different firms, rather more cheaply than I suspect that Chester would supply it…

 

I found that here, FWIW. But if it isn’t the correct one, then clearly Chester is the right place to turn first, like Roy says. Getting the spec of the belt appears to be the thing to do though – shopping around looks like the way to go.

Edited By Steve Garnett on 03/12/2010 12:39:54

[Gordon WParticipant @gordonw]

Thanks for replies so far. Yes I asked Chester first, they can’t help, which is why I posted here. It’s the toothed belt I need , like a minature timing belt, although the V belt is not a common size I found one OK. It would help if I can find the belt standard, if there is one.

[TerrydParticipant @terryd72465]

hi Gordon,

 

If that’s their customer service, i.e. can’t supply spares for the equipment they supply, I think that I’ll go elsewhere for my new machinery.  I thought they would have had an obligation to keep spares especially ones which are liable to need replacing such as belts.  No wonder Britain is going down the pan.

 

Do Grizzly or Harbor Freight in the States do an equivalent, they would probably be faster and cheaper.  If Grizzly do an equivalent then there will be a manual and parts lists on their site.  A much more professional approach, I wish they traded here.

 

Terry

[JasonBModerator @jasonb]

Maybe you spoke to the wrong person, from this thread on their website it seems they can supply the belt for £21 +VAT.

 

Warco one sare likely to be the same, I know my 280 has a similar Polyflex belt. One thing I do with a new machine is note the belt ref that is printed on the belt as it can wear off with use.

 

J

 

EDIT just read your post again its not the variable speed one so the 7m710 is not what you need

Edited By JasonB on 03/12/2010 17:59:23

[wheeltapperParticipant @wheeltapper]

Well if Chester can’t supply a toothed belt then I’m in trouble, I’ve got a variable speed Comet and that has a toothed belt as well.

 

It seems inconceivable that they don’t stock such a basic spare.

 

Roy

[Gordon AParticipant @gordona]

Greetings Gordon.

 

I had a similar problem about 5 years ago with an Axminster “Hobby 818” lathe that used a very narrow Gates belt of vee form. My solution was to take the belt to various local suppliers of belts and bearings etc. Eventually found a helpful young man who took the trouble to take measurements and delve into the catalogues, I think it may have been at BSL or Brammer, (they may be the same company).

Took a couple of weeks to arrive and cost about  £13 for a pair. (1 as a spare). Could you do a similar thing?

 

I suppose I am lucky that there are still some vestiges of engineering here in the (de)industrialised West Midlands. Hope you have similar opportunities.

 

Gordon.

 

 

 

 

[Martin WParticipant @martinw]

Hi

 

Would the round belt material that you make up to length be suitable. It is or has been advertised on Ebay. I think the process is to measure round the pulleys to determine belt length then subtract a bit (set percentage) and join using a hot blade. I realise that is not suitable for a flat toothed belt replacement but could work on V pulleys.

 

I think it has been covered on this forum before so may be worth a search if the lathe supplier fails to stock the spare you require.

 

Cheers

 

Martin

 

PS

 

Terry

 

 I would agree with you that the supplier should be obligated to keep what is effectively a consumable for a reasonable time. Even if not obligated then good customer service would dictate that spares like this should be held . I know for a fact Chester don’t/won’t hold touch up paint for their machines.

Edited By Martin W on 03/12/2010 19:31:58

[JasonBModerator @jasonb]

Just read something similar on CNCzone. Could it be 3/16″ pitch in which case its a “F profile” belt and virtually unobtainable, the profile dates from the 50s & 60s and does not match the current imperial (XL)or metric (T5) pitches, maybe the far eastern factory has a stock of old belts to use up or the mandrel to make them

 

Jason

Edited By JasonB on 03/12/2010 20:11:17

[JasonBModerator @jasonb]

Looks like Quantum do the same lathe in both variable and 6 speed like yours, may be worth contacting them for spares, I think in germany they have to make spares available for a set length of time, I know I wa sable to get a spare belt for my Emco that was 20yrs out of production.

 

Jason

[Ian S CParticipant @iansc]

If its a Gates belt, and the lathe possibly designed for the US market, maybe its an imperial size, so it may need to be got from the US, if British suppliers don’t hold imperial stock any more. Ian S C

             1/16″ x 3/16″ x length of belt

Edited By Ian S C on 04/12/2010 00:51:49

[TerrydParticipant @terryd72465]

Hi Gordon,

 

I just had a look at the Grizzly G602 which looks to be the same as the Chester DB-10 a slightly larger version of yours (I think) the parts list shows a toothed belt.  It may be worth an email to check.

 

Apparently according to the WTA the current legal position on spares is this:

 

“Legal Position

Manufacturers or distributors have no legal responsibility to supply spares within a given time frame.

Current EU guidance is that, if a product costs more than £125 at point of sale then functional spare parts should be available for eight years from the date of final production. For cosmetic spare parts this period is six years.
There is no guarantee of spares availability or any guarantee on how quickly spares have to be provided within or outside of this period
Functional spare parts are considered to be any mechanical or electro-mechanical part.”

 

It may be worth pointing out the EU guidance to Chester as an example of good customer service if not legal requirement.

 

Regards

 

Terry

Edited By Terryd on 04/12/2010 03:10:01

[Frank DolmanParticipant @frankdolman72357]

     Seems to me that with nothing said about price, guidance or legal

   requirement is meaningless.

[JasonBModerator @jasonb]

Posted by Ian S C on 04/12/2010 00:49:39:

If its a Gates belt, and the lathe possibly designed for the US market, maybe its an imperial size, so it may need to be got from the US, if British suppliers don’t hold imperial stock any more. Ian S C

             1/16″ x 3/16″ x length of belt

Edited By Ian S C on 04/12/2010 00:51:49

 UK suppliers do keep imperial belts but as I said above the current imperial (international) standard is not 3/16″ pitch, the nearest is termed XL which has a 0.200″ Pitch and these are not made 15mm wide, 1/2″ or 3/4″ are the standard widths.

 

This was the post on CNCzone

 

Jason

[Gordon WParticipant @gordonw]

Thanks for all the replies. The F section seems a possible , will try to track it down, can’t find any ref. anywhere. Tried hawking the belt around, very limited round here unless it fits a tractor. Belt is still just usable, so will look into getting pullies and belt for metric HTD range and make the mods .if possible . Chester ignored emails, the man that deals with these things is busy in the workshop, and doesn’t reply to tel. calls, ( thats a quote ) This was made in 2006 so hardly old.

[Peter G. ShawParticipant @peterg-shaw75338]

Gordon A,

 

I’m intrigued about your Axminster 818 lathe and the narrow belt. Is this lathe the same as the Mashstroy C218T (refer to Mashstroy  on Lathes.co.uk for a picture)? If so, then like you, I used BSL/Brammer 2 weeks ago to get replacement belts. I hace the Warco 220 version, but I know Excel did sell the same lathe as the Excel 818.

 

On a more general basis, I have found in the past that BSL (as it was) have been very helpful indeed in obtaining and supplying drive belts, eg, it took three attempts to get the correct size for my drilling machine primarily because the old one was stretched too far.

 

Regards,

 

Peter G. Shaw 

[TerrydParticipant @terryd72465]

Hi Gordon W,

 

I’m quite disappointed that you seem to have ignored my email about the Grizzly G602 (also produced since 2006by the way) which appears to be the same as the Chester 10B which is the next size to your lathe.  The countershaft and drive belt also appear to be similar if not the same.  They even illustrate the parts in their parts list and will ship parts to the UK for postal charges and you can order them from the website.

 

It would have been at least worth an email or just contact them from their siteto see if the the belt would match but it appears that you think it easier to and possibly cheaper to modify the machine with new pulleys and belts.  I assume that the toothed belts and pulleys were originally used to provide a positive correlation of the drive when threading which vee belts will not do.  Still it’s your choice.

 

Terry

Edited By Terryd on 04/12/2010 13:05:56

[JasonBModerator @jasonb]

Maybe he didn’t ignor you

 

Given that Grizzly list the belt as a 263L It won’t fit as L is 3/8″ pitch and the belt is 666mm long (26.3″ approx)

 

Jason

Edited By JasonB on 04/12/2010 13:49:29

Edited By JasonB on 04/12/2010 13:51:53

[Anthony AshgroveParticipant @anthonyashgrove58555]

Hi Gordon,

Not seen the lathe, so not really sure what I’m talking about!! Two suggestions look on the Radio Spares web site they do lots of odd sizes in lots of things none electrical, second suggestion if all else fails check on the HPC Gears web site, they might have the belt you need, if not they could supply a belt and pulleys to convert to a stocked size if you have any room to change pulleys and tension motor etc, as I said I have not seen the lathe so these are ‘off the top of my head’ suggestions, hope you get a result soon.

Regards

Tony Ashgrove 

[macmarchParticipant @macmarch]

May I suggest that as you are having a problem with Chester that you have a word with Uniroyal. They make most of the toothed belts for most suppliers.  Also look at the cat from HPC and or Davall Gears. They list belts of all types. HTH

 

cheers

Ray

[macmarchParticipant @macmarch]

Just looked at Davall cat again.

 

part no 615-5M-15 may do the job. (therer are also several other belts that could do it.)

 

Thisbelt is 615mm length, 123 Teeth, 15 mm wide, 5mm ptich.

 

Sorry if I offend but are you aware that the pitch is taken as the CHORD length. (ie. curved at a point above the the tooth base.)  Like gears its the pcd not the straight line measurement.

 

If you wish I could send copies of the relevant pages. Drop me a pm with your email addy.

 

 

cheers

ray

Edited By macmarch on 04/12/2010 17:50:40

[JasonBModerator @jasonb]

Posted by macmarch on 04/12/2010 17:27:31:

 

Sorry if I offend but are you aware that the pitch is taken as the CHORD length. (ie. curved at a point above the the tooth base.)  Like gears its the pcd not the straight line measurement.

 

 I thought that was for the pully, if it were for the belt then the chord length and therfore pitch would vary depending on the size of the pully wheel?

 

HPC have the belts measured from tooth to tooth irispective of the pully dia

 

Jason

Edited By JasonB on 04/12/2010 18:47:53

[Dinosaur EngineerParticipant @dinosaurengineer]

Maybe this post is a lesson for all of us to buy the more predictable spares that have a limited life with the M/C ?

I remember in the good old days that VW shipped Beetle spares to each country before they shiiped any cars .

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