OK this is about my tandberg Reel to Reel player. However that has nothing to do with the rest of the discussion/question.

So it has a wheel mounted on a spindle on the motor. That wheel has straight knurled rim edge.
To that engages a idler wheel held against it with a spring loaded arm. That idler has a rubber tire of sorts, its like a coated rubber tire instead of an actual replaceable tire. That actually is my question. To the other side of the idler wheel engages a smooth rim wheel made of brass.

The problem is that the tire has got worn, hard and generally not tractive enough nor does it have enough tread to grip the 2 wheels and keep em turning.
That guy is thin too, and it has to be, anything thicker will not fit in that gap. If I could have I'd have fabbed something to take its spot with a groove for an O ring that will be replaced when needed. So it cant be fatter than the 1/16th inch or so it is. Its about 2" diameter.

I need a material I can coat onto the wheel or a true tire of sorts I can replace that I'd slap onto it ... needs to be grippy like a race slick, needs to resist being cut by a 1/16th inch wheel, and really it can have a ton of meat in the tread area, that part will be fine for the extra preload and room to wear type deal.

Anyone know what I can use for it.

Cool.
Buddha.

no idea, but pics would help.

maybe some of that tool grip plastic dip?

http://www.summitracing.com/parts/PLD-11603-6

Well plasti-dip on steroids maybe ... has to be cut resistant and I would prefer more tacky like a race car tire. In all honestly if I dont find much by way of tire or belt like items I will try plasti-dip.
I may work on refabbing it ... but lets see.
Cool.
Buddha.

Quote from: The Buddha on August 18, 2011, 12:21:41 PM
Well plasti-dip on steroids maybe ... has to be cut resistant and I would prefer more tacky like a race car tire. In all honestly if I dont find much by way of tire or belt like items I will try plasti-dip.
I may work on refabbing it ... but lets see.
Cool.
Buddha.

have you tried scuffing the wheel a bit to amke it a tad rougher. i had to do this with a few RtoR units

could you modify something like this to fit?

what make/model is it?

Its a tandberg 6 reel to reel. A dozen tubes in it and phenomenal sonics, mine has the original siemens german tubes in it and they look hardly used, of course they are preamp tubes so they dont see any power, will last forever if properly maintained. The transport belongs in a hamster cage. Seriously.

Scuffing - I'd be loathe to do that. I've done pinch rollers etc that way, but this guy is too thin. besides I suspect its wore too much, its 2.32".and I think it should be around 2.5 ...

That roller you got is a pinch roller I think. This one is a idler, its under 1/8th thick. I am thinking of fabbing it from delrin or something like that.

Cool.
Buddha.

I think I'll make an 2.5" dia 1/8"th thick disc from delrin, groove the bugger for a 1/8th O ring and fit a 2 1/4 O ring on there and glue it in. Lets see how it goes.
Cool.
Buddha.

Go to an electrical wholesaler and pick up some rubber tape...put a couple of wraps around it, stretching as you go and use a razor knife to cut off the excess around the edge...should work for you...

Later.

Ooooo - what was that - never heard of rubber tape ... what is it - does it have adhesive ?
Time to check the local rat shack ...
Cool.
Buddha.

Don't know if Radio Shack will have it...it's used to insulate motor connections for 1 to 50Hp three phase motors...

the tape when you stretch it will try to shrink back to it's normal length and will end up gripping and conforming to the shape of what ever you put it on...it has an adhesive side and sort of vulcanizes over time so that you can't pull it apart...we usually wrap it in PVC tape afterward, but your application would be better with just the rubber tape...

Electronics wholesalers may have it as well...not too sure about retailers...just check where the electrical contractors shop...

Later.

I got somehting @ the Hardware mega box store ... 3/4 inch wide, made by duck, looks like it will do the job, stretches, glues and has a super rubbery tacky back side.
For good measure I got bicycle inner tune and tennis racket grip type dealio to slip on top of that.
Cool.
Buddha.

and thus the 2011 afro-engineers conventions begin

too bad there isnt a pdf of this. or maybe there is idk

http://www.ebay.com/itm/Tandberg-Model-6-Reel-Reel-Service-Manual-/150586871588?pt=Vintage_Electronics_R2&hash=item230fad4f24

Have that and another manual, no mention of the right dia for the roller. I never have problems listed in any manual. Those are the easy ones kiddo. How many times have  you seen the manual say, open up the carbs and jet it like it is jetted in canada if you take forever to warm up.
Cool.
Buddha.

good point. thing is ive had a few of these but luckily ive not had a broken one. that aside, ive not seen this problematic wheel either. so really have no idea what it looks like or what could be modded to fit. kinda like in my line of work, you tell me hey my seiko is broken how do i fix it?, without me knowing what hte problem is or what model or what it is or isnt doing. anyway you can get a picture of the offending wheel? or at least a picture of a good one?

I'll put pics up in a bit.
Cool.
Buddha.

If I'm not too late why not try coating it once or twice with silicone RTV?

Oh, I tried that tacky back electrical tape, it curled over the edges and that caught the arm that its mounted on.
I've now given up on it except for fabbing ti out of delrin and slipping a huge O ring 2 /14 X 1/8 thick, on it.
Cool.
Buddha.