Polishing speeds

[GraemeVW]

I have previously got by with mounting mops in my pillar drill it always planned to convert an old bench grinder to a polisher.
Then I ended up buying an old 10" grinder with polishing spindles fitted and a load of old big 10"? mops.

This seems to have been used as a polisher for a while, but it's only 1500rpm.
I've since read that 3000rpm grinders are recommended, but that's normally with smaller mops.
I assume the speed at the moo surface is what's important so bigger mops, less speed?
It should have a load of torque though.

Will this set up work ok, or am I better off finding a faster grinder?

I'm not going to be doing large scale professional grade polishing, I could get results that worked for me with the drill mounted bodgery. So I guess this should work better.

Not something I know a huge amount about though.
I'll mostly be tidying up previously polished aluminium or brass. Odd bit of copper, maybe some steel.

 

[frank horton]

just get big dia mops.....biggest prob with these conversions is the lack of HP......u'll prob stall it all the time.....

apart from the bearings and the mop spindles it's all out of the scrap bin.....it does have belt guards now....
mine has a 3HPx3phase motor on it......
it'll run all day and not get hot plus never stalled it yet...

 

[GraemeVW]

just get big dia mops.....biggest prob with these conversions is the lack of HP......u'll prob stall it all the time.....View attachment 316031
apart from the bearings and the mop spindles it's all out of the scrap bin.....it does have belt guards now....
mine has a 3HPx3phase motor on it......
it'll run all day and not get hot plus never stalled it yet...

That's the thing I guess. It's ok going bigger mops, but they need more torque not to stall.

I was going to use an old belt driven one I've got...

I was going to chop the pump off this old sip compressor motor...

Sip reckon the old compressor was 1.5hp but that don't look like a 1.5hp motor to me!

If this old 10" black and decker is no good I'll revisit this idea. Could gear it how I liked then too, and swap motors if I need more power.

The 10" B&D is rated at 1hp.
It must have worked as a polisher somewhat though as it's been set up that way for a while.