plastic ball bearing sheaves

Having the same problem with IYE genoa car sheaves although haven't looked at traveller sheaves yet. You might find the pin is actually 1/4" or 6.35mm as they are imperial dimensions. The genoa ones are the same size except 18mm wide. They have a 1/4" pin and a 3/8" plain bush. Is your existing a plain or ball bearing?

I found some close in size on eBay from Versatile Marine in Penryn but the listing has gone. However, they are a machine shop as well, so should be able to turn them and have right tools to hand. But anywhere able to machine acetal/Delrin could do it I guess.
 
Is this one of those old travellers which runs on a round tube?
Is it the same as might be fitted on the centre main of dinghy, maybe 60s vintage?
I think I've seen one somewhere recently.
I suspect it will be ancient, the sheaves might be brittle, just like the one that broke, although it might not have been in the sun so much?

Otherwise, I've seen people on ebay offering to machine bespoke sheaves.
If you want ball bearing, you could get a stainless ball race and get a Delrin 'tyre' or rim machined for it. I made some sheaves like this once.
 
So if it was just a plain wheel without the balls you could make do with a bit of oilon turned up 28 diameter, 15 wide with a 6mm hole. Is that it?
Or you could have the same thing but with an oilite bush inserted that had a 6mm hole to take the wear better.
 
Daydream believer said:
So if it was just a plain wheel without the balls you could make do with a bit of oilon turned up 28 diameter, 15 wide with a 6mm hole. Is that it?
Or you could have the same thing but with an oilite bush inserted that had a 6mm hole to take the wear better.
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You could.
Plain bearings in good nick will be better than knackered ball races.
A traveller is a lot of load to put on a couple of balls in a race.

Is it one of these?
IYE 'C SERIES' MAINSHEET CAR/TRAVELLER - (WHEELS REFURBISHED) | eBay
I've got a broken one of them somewhere!
Looks like the vendor knows how to fix them?

I do believe my broken one has (had!) stainless ball races... I may have chucked it.
 
MikeCC said:
Having the same problem with IYE genoa car sheaves although haven't looked at traveller sheaves yet. You might find the pin is actually 1/4" or 6.35mm as they are imperial dimensions. The genoa ones are the same size except 18mm wide. They have a 1/4" pin and a 3/8" plain bush. Is your existing a plain or ball bearing?
Click to expand...
I did think that might be the case but as I'm having trouble finding metric size I thought it would be more so to find imperial!
I found some close in size on eBay from Versatile Marine in Penryn but the listing has gone. However, they are a machine shop as well, so should be able to turn them and have right tools to hand. But anywhere able to machine acetal/Delrin could do it I guess.
Click to expand...
I have some delrin rod, so turning a new one was option 3, option 2 was to buy one without a bearing.
 
LadyInBed said:
I have some delrin rod, so turning a new one was option 3, option 2 was to buy one without a bearing.
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So if you purchased an imperial sized oilite bush & press fitted it into the delrin you would have a perfectly good self lubricating wheel & the bush would spread the load to the delrin rather than the delrin bearing on to the 1/4 inch spindle
 
LadyInBed said:
I did think that might be the case but as I'm having trouble finding metric size I thought it would be more so to find imperial!

I have some delrin rod, so turning a new one was option 3, option 2 was to buy one without a bearing.
Click to expand...
Sometimes it's hard to tell if the dimensions are designed metric or loosely converted from imperial. If you have the means to machine them, that might be the path of least resistance. Not in my skill set so I might try Versatile myself. Plenty of oilite bushes 1/4-3/8 around.
 
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