Plastic v steel

john robert bould · Jun 6, 2014

phils asked my to post a few Norton Commando topics. Thought they might be refreshing.

So here is my first;
I get a few Commando sliders that are quite scored in the bore, Not a lot that can be done, but i have seen Maxtons plastic bushs..so i have just {today] received my bar of PEEK engineering plastic... i have deceided to make up some with the material...any problems encounted with the stuff ?...It's spec is great with little to no Hydroscopic tendency ..Co F very low.?

Hobot · Jun 6, 2014

Jim Schimdt offers special composite bushes for Roadholders so check his site then ping him too.

jaydee75 · Jun 6, 2014

PEEK is an amazing material. I'm running mine in brake fluid, no problems. It is a very tough, inert material. Should be fine in forks.
Jaydee

Bernhard · Jun 7, 2014

This plastic material will only be the dog’s dinner if the chrome on the sanction’s are in A1 condition :!: :shock:

dennisgb · Jun 7, 2014

jaydee75 said:
PEEK is an amazing material. I'm running mine in brake fluid, no problems. It is a very tough, inert material. Should be fine in forks.
Jaydee

+1 We use it for a number of products. Most are injection molded so not sure about machining it. Tough stuff. At the top of the charts for strength.

john robert bould · Jun 7, 2014

Cannot imagin anyone who as any sence ,installing state of the art material with rough stanchions...bit like in stalling new con rods with worn out scored shells :!:

Bernhard said:
This plastic material will only be the dog’s dinner if the chrome on the sanction’s are in A1 condition :!: :shock:

kerinorton · Jun 17, 2014

you are not going to believe this. My mastercylinder has been resleeved with the stuff. Dereck

jaydee75 · Jun 17, 2014

And it is what I made my M/C piston out of. Easy to machine, low friction, and durable.
Jaydee

Rohan · Jun 18, 2014

This sounds a little like the story where Villiers, quite some decades back now, experimented with part nylon big end bearings.
(single cylinder 2 strokes, as Villiers were famous for, and did well at for a fair slice of a half century).

All seemed to be going quite well, but the power ebbed away and came to a halt.
The first thing they did was remove a spark plug.
And were startled that the plug snapped back into position, as it were, when they went to remove it.
Held by a strong thread of nylon.
Obviously all was not going well with the nylon bearing down below....

But that was nylon.

madass140 · Jun 18, 2014

reading the other day about a company that does 3D printing, they can 3D print in 107 different materials.
Its a whole new world out there with all these new exotic materials being created. mind boggling.

olChris · Jun 18, 2014

Rohan said:
This sounds a little like the story where Villiers, quite some decades back now, experimented with part nylon big end bearings.
(single cylinder 2 strokes, as Villiers were famous for, and did well at for a fair slice of a half century).

All seemed to be going quite well, but the power ebbed away and came to a halt.
The first thing they did was remove a spark plug.
And were startled that the plug snapped back into position, as it were, when they went to remove it.
Held by a strong thread of nylon.
Obviously all was not going well with the nylon bearing down below....

But that was nylon.

Nylon (newyork/london). Its hard for me to get out of the past as is for many others........... But "they" can build complete (90%) of Military aircraft like a Stealth fighter (25yrs ago) from plastic/nylon now. Its a big change for many of us to understand.. (well maybe you all are up to date with techno materials and stuff, but im not!)

Rohan · Jun 18, 2014

The missus didn't wear nylons ? (stockings).
I've got tyres with nylon sidewalls - never rot.
Even if the tread doesn't grip the road in the wet...

Been around since before the war, before it gets too technical.
Quite a common plastic, after the war.
http://en.wikipedia.org/wiki/Nylon

But we diverge.

Plastic v steel

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