Replacement 4 ribbed belt record CL2 lathe

[jon hill 3Participant @jonhill3]

I decided to overhaul the headstock bearing on my Record Coronet 2 lathe and bought a kit from a woodworking supply shop, however the ribbed belt supplied is a 5 ribbed not 4 in the existing. Everything else in the kit appears to fit, having made some rough measurements in the sealed bag. I contacted mentioned supplier and they said that Record do not supply a 4 ribbed belt for this lathe and am reluctant to return the kit for just a belt.

So my question is where can I source a 4 ribbed belt?

The spacing between ribs looks approximatly 2.5mm (rib to rib) and outside diameter of the belt is 475mm.

[jon hill 3Participant @jonhill3]

replacement ribbed belt

[KWILParticipant @kwil]

Cut off the spare rib?

[John HaineParticipant @johnhaine32865]

Do you mean a poly-vee belt? Try https://www.bearingboys.co.uk/Poly-V-Belts-3781-c

[Roderick JenkinsParticipant @roderickjenkins93242]

Sounds like a J section belt with 2.34 mm rib spacing. For wider belts ribs are added with the same spacing so, as KWIL suggests, cutting off the extra rib will be fine. If you don't fancy this then a 4 rib J section belt is readily available from e.g. Bearing Boys **LINK**

HTH,

Rod

Edit: slow again!

Edited By Roderick Jenkins on 29/10/2022 14:21:00

[jon hill 3Participant @jonhill3]

Thanks guys,

KWIL I did consider cutting off the 5th rib, but I thought I might get an uneven cut by hand and I would still have the same problem of modifying a replacement next time round.

I guess the exact length isn't mission critical as the suppliers I have found list 483mm not 475mm. I have some tension adjustment on the motor pulley.

By the way what is the convention on listed belt sizes? Is it inside diameter or outside or even the trough of the v?

Also is there much of a quality difference in brands, or a few brands that are best to choose from?

[DC31kParticipant @dc31k]

Posted by jon hill 3 on 29/10/2022 15:44:30:

I guess the exact length isn't mission critical as the suppliers I have found list 483mm not 475mm. I have some tension adjustment on the motor pulley.

You are measuring the length in a different way to them. Put 'J section belt dimensions' into Google and you will find out what the correct belt code is for your application. Length is measured at the pitch diameter so their 483 pitch measurement will be considerably longer than your 475mm outside measurement. You will need a pitch measurement less than 475mm to achieve a 475mm outside measurement. Does the one you have not have a code written on it? If so, you need the same belt just with the appropriate part of the code altered to denote four ribs not five.

[jon hill 3Participant @jonhill3]

Unfortunatly most of the details are worn away on the outside of the belt so no code.

[DC31kParticipant @dc31k]

Posted by jon hill 3 on 29/10/2022 17:49:55:

Unfortunatly most of the details are worn away on the outside of the belt so no code.

Not the code from the old 4-rib. The code from the new 5-rib. 80% of the 5-rib code will be correct for its 4-rib equivalent. Do your research on translating the code and you will be able to supply the missing 20%.

[duncan webster 1Participant @duncanwebster1]

When I bought a poly vee belt for a tiddly Proxon band saw I got it from belting on line. They assure me that they just cut the required number of ribs off a very wide belt. I reckon if you turn it inside out and use a sharp Stanley knife it will be OK

Edited By duncan webster on 29/10/2022 23:42:38

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