Timing Belts

Hello everyone,My name is Bruce,I live in Perth Western Australia.I completed my trade as a Mechanical Fitter,Im now retired Disabled.I have always had an interest in I/C engines.I have started to consider building a miniature engine and got stuck at the timing belt, so I looked on the internet for poly urethane(2 pack) products but found nothing to do the job.My question is,can anyone suggest a company or product that I can use to cast my own timing belts.Thanks for your time, Kind Regards Bruce.

Welcome, Bruce

Whilst no wishing to put you off experimentation, I think you would do much better looking for a commercially made belt ... Many of these have quite sophisticated reinforcement within them.

What sort of dimensions are you looking for

MichaelG.

Hello Bruce,

In the UK RS Components stock timing belts (though there are a lot of other suppliers). They have an Australian division too with similar stock. Not the cheapest but fast delivery. In the UK Arc Euro Trade also supply them and maybe Ausee too? As Michael says, they are highly engineered, precise components and it would be very hard to replicate using polyurethane I think.

J.

Hi Bruce

If you are looking for small this Australian site has down to 1mm pitch Timing Belts, **LINK**

I have no connection with them just noticed them a while back

Regards
John

A timing belt which drives a camshaft has a lot of alternating load. If you are going to make your own toothed belt, the major difficulty I envisage will be the positioning, and tensioning, of the reinforcement. This is needed to resist belt stretch, and might be steel cable, Kevlar, carbon fibre, etc. Any hint of stretch in use and the teeth will no longer fit the pulley, with unfortunate results.

In my book, there are some things which I will not even attempt to make. Sparking plugs are one, and toothed belts another.

Not good news, perhaps, but better than finding out as the engine blows up.

Cheers, tim

If you want to make everything yourself and want a challenge, why not make a roller chain?

Neil

Thank you to everyone for your suggestions,I will continue with my experiments and once I succeed I will post my findings.Regards Bruce.

Edited By JasonB on 25/05/2016 07:34:11

Or you could try belting online, they have a comprehensive list of drive belts and ship worldwide.

cheers

Dean

Hi Bruce,

Naismith are the Australian manufacturers of timing pulleys, belts etc

http://www.naismith.com.au

Or Hobby parts as suggested

Dave

One of Nemett's engines had a timing belt driven camshaft.

If it happens to be an interference engine I'd not take the risk of a home-brew belt.

As an a​alternative, you could use eccentrics and con rods, like the early Bentley, or some NSUs. Still need a reduction gear though. Unless you're making an Atkinson type engine of course 😊

BM1

If you (or anyone else) need carbon fibre tape for strengthening, PM me - I have a very large roll of half inch (or so) wide which has surfaced from long term storage.

rgds

Bill

I got the timing belt for my Nemett from HPC gears.

Roy.

Hi Bruce, try looking at power tool parts lists (Dewalt/Elu/Makita etc) lot's of them use urethane toothed belts for power transmission on planers/sanders/thicknessers. My cheapo belt sander, my Dewalt thicknesser and several other tools use easily available belts. Nathan.

http://simplybearings.co.uk/shop/Belts/c4601/index.html

Might be a shot?

Michael W

Edited By Michael Walters on 06/10/2016 20:13:38