A worm wheel & differential unit - ME photo

I replied to you on RCM, but I'm beginning to wonder if you know what you want. At first you were inquiring about Torsen differentials which incorporate worm gears, now it appears as if you are inquiring about worm drive axles incorporating a differential. If it is the latter, then they are easier to make than say a spiral bevel drive axle. Look up worm drive reduction boxes... As for making the differential gear, one with straight spur gears like the early Austin Sevens would be the easiest to make. If you want some more info & pics mail me off list.

Tom

"> Hi all,

Geoff

A number of prewar vehicles used worm and wheel diffs - largely because it allowed a lower floor level in the rear - something that front wheel drive now allows. More recently the everlasting Peugeot 403/404 had a worm drive back axle.

Charles

Hello Tom, Thanks for your reply to this and in the other ng.

I was and still am interested in all alternative diffs to the standard. As soon as my house move is done and I've settled in, I will spend time with my CAD software and design one using the replies I got on RCM. I have downloaded some of the diagrams from the various websites mentioned

Then I saw the photo in ME and it looked interesting. I would very much like to compare how the two work, especiall in miniature sizes.

Thanks Tom. Have sent an email. Regards GeoffH Norfolk - UK

Thanks Charles. Will peruse the site. Regards GeoffH

The BSA three wheeler and 4-wheel Scout sports cars of the 1930's had worm and wheel diffs with spur gears. The worm was case hardened steel and the wheel was bronze. I can send a coup;le of diagrams if wanted.The broze wheel is quite a massive thing in a diff, even for a small low-powered engine.

Dave (UK)

Sunbeam S7 and S7 shaft drive motor cycles are another example - made with worm and wheel as that was the equipment available left over from pre-war car production though used from 1947 to about 1953/4 to make Sunbeams. Incidentqlly they had to de-rate the engine (was cross flow but moded to carb and exhaust on same side) as the original engine was too powerful for the worm & wheel.

Andrew Mawson (proud owner of a 1953 S8)

In article , Andrew Mawson writes

Can I have a go mister?

:^)

On yer bike !

In article , Andrew Mawson writes

I'd offer you a blat on my Enfield 500 caff racer in exchange. Or the GoldWing, or the ZZR1100. Your choice. ;^)

Din't know they had caff's in India, init

-- Regards,

John Stevenson Nottingham, England.

Thanks Dave. Would appreciate copies. Have sent email. Cheers GeoffH

In article , John Stevenson writes

Well, OK. It's more of a Curry House Racer.

Vindaloo or Koorma?

Regards, Tony

In article , Tony Jeffree writes

I like to think Balti. With Pillaw rice and a plain nan.

Bugger, I want one now...