Nylon roller bearing jobbies

[kerching]

Maybe one for @Sidewinder this one

i need a cheap source for some nylon rollers with bearings for the pallet wrapping machine ( which seems to be working now after a bit of furtling )

70 mm o/d

15 mm hole in bearing for shaft

wheel,approx 25mm thick....forgotten exact size....can get it tomorrow

Material.....Nylon, Delrin, Acetal, PU.....prob nylon is best

these run in captive slots under the platten

it should have 7  ( position 8 is where the mag prox sensor is for rotation count)

presently it only has 4/7

anybody know of a decent source?

ta!

 

[Tony S]

http://www.btpltd.com/

Their delivery driver is a cute blond.

Polypenco nylon is very hard wearing.

http://www.polypenco.co.jp/products_e/mc_weel/index.html

 

[Sidewinder]

@kerching, don't you have a lathe?

TBH, I'd buy a length of nylon 6.6 rod the right diameter, cut slightly over length with a chopsaw and coarse blade, then face and chamfer each end to length in the lathe...

Or you could go to the machine OEM for the original spares, or get the plastic supplier to do it for you.

There are loads.

https://uk.rs-online.com/web/p/plastic-rods/0770080/

Not a bad price tbh either.

You could even make a set, and that way they would all be the same diameter.

Id Dia 70 will go up the hollow spindle then I would scrap the chopsaw stage & do it all on the lathe.

I would also check the shaft size and select a running fit for the roller based on the shaft, rather than base it on one of the rollers.

Likely M12 shaft, so you might get away with a 12.5 or 13 mm dia hole.

M14 is not a preferred size, but, then again the shaft could be stepped.

 

[kerching]

@Sidewinder

i did consider turning some up.for him. I have some delrin bar in the workshop, but I am having a few issues at present ( NOT like the last ones )

they will only be as a set of spares as it seems to be running fine on 4 and is not turning much weight

as for the OEMs....they cannot even be bothered replying to email about a manual for it!

 

[Sidewinder]

I wouldn't turn the OD unless I had to.

The way the extrusion is processed, it has a slightly harder skin, if you can get bar the right diameter it will be tougher on the outer surface which will give the rollers a longer lifespan.

 

[kerching]

I wouldn't turn the OD unless I had to.

The way the extrusion is processed, it has a slightly harder skin, if you can get bar the right diameter it will be tougher on the outer surface which will give the rollers a longer lifespan.

Excellent advice, I didn't know that, just assumed same density throughout