Re: Timing Pulleys - Chain & sprockets?

Hello again,

Use an old bicycle commuter trick for the chain lubrication... (With
thanks to George Sheehan, of Bicycling magazine.)

Drop it in a pail of melted paraffin WAX (NOT kerosene for those of
you across the pond!<G>). Let it "cook" awhile-45 minutes or so. Then
remove and let it "drip" dry/cool. At first it will be quite stiff,
but then will retain its lubricity for a long time, without drawing
dist/dirt/swarf to itself...

#25 chain is good for about 480 lbs, so use a pre stretch to get rid
of the initial looseness, then run it tensioned at a value which
makes sense in light of the above, and your gantry/axis weight.

Hope this helps,

Ballendo

P.S. Chains used this way are not noticeably louder than belt
drives...

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "mmurray701" <gmurray@n...>
wrote:

> I dont think backlash would be a problem, assuming its kept tight.
> But belts are usually a better idea than chains for power
> transmission. Belts should last longer, run quieter and don't

require

> frequent lubrication and adjustment for wear. I think your best bet
> would be to head over to www.sdp-si.com and pick up some timing
> belts and pulleys. I suppose it could work if you got them dirt
> cheap though. Good luck.
>
> Mark