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Discussion Starter · #1 ·
I have two stationary sanders, both Deltas. One a 4" belt/6" disc. The other a 1" belt/8" disc. I'm replacing the paper on both discs but haven't ordered any yet.

Given this setup, what grit would you place on each one?

The 8" spins so fast, I burn most wood I'm sanding. I will not rule out operator error!

Thanks, Bumpus
 

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Old Methane Gas Cloud
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On the 8" I would go with either 60 or 80 grit.

On the 6" it seems that 120 is too fine (on mine) so I would go with 100 grit.

Disk sanders require a very, very light touch. You're shaping and only later will you be smoothing with a hand sanding block.
 

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I gave up on the 6in disc on my disc/belt sander. Too small.

I eventually purchased a 12in disc sander. I think I have 80 grit on this. This is direct drive, likely yours are also direct drive. Mine is 1725 rpm.

I would go with a coarse grit on the 8in unit. Light pressure and keep the wood moving. I am also able to burn the wood if I am not careful.
 

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Old Methane Gas Cloud
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One other thing. Get a sander eraser. It removes all the gunk from the grit and helps the disks to last much longer.
 

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Discussion Starter · #5 ·
Thanks for all the suggestions. I have an eraser, it works great, these discs were just shot.

I know what you mean about the 6" being small. It will have to do for now.

Bumpus
 
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