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rsser
1st October 2006, 07:07 PM
Hi folks,

A mate asked if I could turn some thick nylon sleeves for his motorbike frame protectors.

Any tips?

I'm guessing it will be softer than the acrylic I've used for pens, and that a catch wouldn't be a good idea ;-}

So just use a scraper?

TIA

Ashore
1st October 2006, 09:19 PM
Have turned it on a machine lathe , use a negative rake tool 3/4 deg same as you would for copper . For the final finished size allow to cool in the lathe first as it grows / shrinks with heat as you turn, only take small cuts

Rgds

Toolin Around
1st October 2006, 10:50 PM
I've turned a bit and it seems to turn well cutting or scraping. Just be careful not to allow heat build up

hughie
3rd October 2006, 09:15 AM
A mate asked if I could turn some thick nylon sleeves for his motorbike frame protectors



Ern,Nylon will be a challange as it is fairly soft and as previously stated heat effected and prone to catches. Especially with a wood lathe due to the way we use the tools, on a metal type lathe even with the control of the cross slides etc it can still catch. You cant sand the damn stuff either.Gently is the only way, If you drill drill out the centre to the right dia it will save you alot of dramas rather than try and internally turn it. The out side you can use a scraper. Its not some thing I would look forward to doing, personally I would look around some other type of plastic to use. Nylon is low cost but has several headaches associated with it. Good luck

tashammer
6th October 2006, 01:39 AM
umm, bit off topic but on the hackaday site there is how to make a cnc setup and they use a lot of nylon cutting boards cut up for the parts. Seems to me that if one were bright enough (that lets me out) then one could make a low cost cnc machine to do a lot of experimental shape cutting. They use stepper motors out of old printers and things. Clever ideas they have.

http://www.hackaday.com/2006/07/12/how-to-build-your-own-cnc-mill/

http://www.engadget.com/2006/06/29/how-to-build-your-own-cnc-machine-part-1/
http://www.engadget.com/2006/07/04/how-to-build-your-own-cnc-machine-part-2/
http://www.engadget.com/2006/07/11/how-to-build-your-own-cnc-machine-part-3/

They use a Dremel as the cutter.

Oh, apropos of another thread while i recall it, there are a few micro switches in a broken microwave (my neighbour gave me her broken one) plus there is a bloody heavy transformer too. (I remember, it was the protect your shed thread).