Pulley suppliers

Bob

You could try

Cheers

Dave

There's a reason behind that: The smallest allowable diameter for section A is 90 mm. So they are already a bit below that. You'll have to make your own I think!

Nick

Ooops, sorry, wrong column: 75 mm!

Nick

Me again!

I found a supplier selling pulleys for section A and SPA with an effective diameter of 55 mm

->

Don't know wether they sell to the Brits. :-) At least their pages are in English.

Nick

Thanks to Dave & Nick. Looks like the machine designers broke the rules. There appears to be a widely used modification of using a twistlock belt which possible gets acceptable performance from the drive. The machine has a 1.5hp motor which seems to break the other rule (from the back of my head someplace) of 1hp per a section belt.

Bob

IMHO this is not so! I remember the last time I checked a Z belt for a large 24v 160A alternator and was surprised at what a Z could carry. Speed and pulley diameters obviously important. Check the Fenner or Gates site for "cogged raw edge" belts, you may find that Z would be ok and pulleys more easily available.

Richard

If you're going to use a pulley that small, best to use a cogged (CRE) or 'toothed' belt.

Tim

Forget that rule! The first limiting factor is the pulling force inside the belt (and thus torque). The second one is max. speed (in m/s; up to and above 100 m/s). So if you do have high RPM, you can transmit a higher power.

Nick

What rule was that?? lol

Forgotten already.

cheers

Bob

Try Brammer,used to be known as BSL.Open Sat am.

Mark.

Julian.

Thanks for that Julian, I've not come across them before. site bookmarked! Bob

Another recommendation for Bearingboys, just bought a couple of A section belts from them, ordered at 3.00pm and they landed on my desk the following morning !