rockinrob86

Rubber for pinch rollers?
« on: October 09, 2018, 09:04:50 AM »
What type(s) of rubber are typically used for pinch rollers?

I have an idea for making some of these and am looking for a rubber hose material I could use


madswitcher

Re: Rubber for pinch rollers?
« Reply #1 on: October 11, 2018, 02:30:06 PM »
Hi Rockinrob,

I would advise against trying to make your own pinch rollers: they are precision parts and have to be made to tight tolerances to avoid wow and flutter on tape machines.  That's why they are so expensive.   The outer cover is a specialised material that is moulded onto a core - usually brass - and then finished off by machining on a lathe.

Kind regards

Mike

rockinrob86

Re: Rubber for pinch rollers?
« Reply #2 on: October 12, 2018, 09:05:14 AM »
I understand this - however, we're on a DIY forum, and I am one of the many on here who responds to "it's too hard, I don't recommend doing it" with "It can't be that hard, I'm sure I can figure something out."

Sometimes I do, sometimes I don't.  I know nothing about rubber formula names though, so that's the info I need.

I've done some googling, but am unsure how the specific rubbers characteristics relate to this application.

This will not be for pro audio or home audio use, and I really want to figure out how to build my own.

gyraf

Re: Rubber for pinch rollers?
« Reply #3 on: October 12, 2018, 09:45:30 AM »
At least some are made of PU

Cast to approximate shape, then vulkanized/hardened, and lapped/sanded into shape

Ask someone that knows paper-handling rollers for printers and plotters - and look for spares for those...

Jakob E.
..note to self: don't let Harman run your company..

mjrippe

Re: Rubber for pinch rollers?
« Reply #4 on: October 12, 2018, 02:30:13 PM »
PU = polyurethane?

Also, try contacting Shane at https://echofix.com/  He makes replacement rollers for Roland Space Echoes and is a super helpful and friendly person.

madswitcher

Re: Rubber for pinch rollers?
« Reply #5 on: October 13, 2018, 06:37:44 AM »
Yes, Athan uses Polyurethane on his rollers. 

I have used his stuff for years and he is very helpful.  I am not sure if he will supply the raw material, but its worth a try.

Cheers

Mike


 

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