300mm disc sander questions

mikeyb2 · Aug 22, 2016

Just bought one and was wondering what would be the most useful and general purpose grit disc to use. It came with a 60 grit adhesive disc and I'm think 120 might be better. Obviously the self adhesive discs are not going to be changed as different grits are desired.
Alternatively, is it worth changing to a hook and loop system so that different discs can be changed readily, or would accuracy suffer due to the softer nature of the backing. Thanks Mike.

Wildestcat · Aug 23, 2016

Hi Mike. After a few experiments I settled on 100 grit as the best compromise for the work I do on guitars & ukes using the disc sander. This is mainly squaring off the heel end of neck blanks, squaring/profiling the ends of fingerboards , bridge plates and such like. I haven't tried hook & loop, but my guess is that accuracy could be affected. Changing the stick-on discs when they are worn out isn't much trouble.

mikeyb2 · Aug 23, 2016

Thanks Paul, I'll look for 100 and stay with adhesive discs for now . Cheers.

Timbuck · Aug 23, 2016

I use 80 grit mostly on everthing ..then scrape by hand

mikeyb2 · Aug 23, 2016

Thanks Ken, I've just got back from Axminster, Warrington, with some 100 grit discs. I'll see how that goes . Now to remove the original disc, which can be tricky I'm told.

Timbuck said:
I use 80 grit mostly on everthing ..then scrape by hand

Vespa Bob · Aug 23, 2016

find that careful use of a putty knife takes the old discs off without any trouble. I also use 80 grit for my disc, belt and drum sander, but 100 will do the job too.

Bob

Huvvers · Aug 23, 2016

Hello Mikeyb2. I have had success using a heat gun. Peel with pliers as you heat, then clean the backer plate with acetone. Replace with the desired grit disc. Very little or no scraping involved. Gary.

mikeyb2 · Aug 23, 2016

thanks everyone, just did it an hour ago. Unfortunately most of the adhesive stayed on the metal disc and not the sandpaper, despite using a hair dryer. Tried acetone,white spirit, methylated spirits, sticky stuff remover without success. Fortunately I found a tin of Evostick adhesive remover at the back of the shelf, which worked well. Still takes a little paience though. I also applied some wax to the surface and buffed off, to aid removal next time, which is a tip I had read about elsewhere. Cheers Mike.

Bob Orr · Aug 23, 2016

Quote; I also applied some wax to the surface and buffed off, to aid removal next time, which is a tip I had read about elsewhere. Cheers Mike.[/QUOTE]

Not sure if the wax is a good idea as you may find the disk does not adhere properly especially around the edges. Please don't ask how I know this!

Bob

mikeyb2 · Aug 23, 2016

Bob, I did suspect that may be the case, but it seems to have adhered well. I'll keep my eye on the edges, thanks.

Bob Orr said:
Quote; I also applied some wax to the surface and buffed off, to aid removal next time, which is a tip I had read about elsewhere. Cheers Mike.

Not sure if the wax is a good idea as you may find the disk does not adhere properly especially around the edges. Please don't ask how I know this!

Bob[/QUOTE]

300mm disc sander questions

mikeyb2

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