12" PSA discs not sticking to Jet sander

Mark W · 2004-06-23T00:25:21+00:00

Ok, here we go. This is my first post on the rec, although I have beenlurking for several years now. Usually any question I need answering Ican easily find by dags, but this escapes me. I just received a JetJDS-12B 12" disc sander for my birthday (Yes, I picked it out). UPSbrought it today from Amazon, along with some extra discs from Grizzly(Woodstock Int. brand). Well, anyway, I cleaned the oils and cosmolinestuff off of the sander with denatured alcohol, taking extra care toget the disc itself clean. I peel the backing paper off of my firstdisc, taking care to get it aligned JUST right before I stick it on.(After all, I get only one shot at this, right?) As I press itcarefully into place, it starts coming right back off when I releaseit! Ok, so I figure it's one of two things; either I didn't get theoils off the metal disc, or it's cheap glue from the aisian importsandpaper. So, I break out the laquer thinner and scrub the metal discagain. Well, just maybe I got a little more off, but I'm not reallysure. Looks just as bone-dry as before. So, I try the same disc againand it falls right back off when I let go. Ok, so maybe I ruined thedisc before, or maybe bad glue, so I try the disc that came with thesander. It's a 60 grit. (What's THAT for, shaping telephone poles?)Well, same results. The discs seem pretty sticky to me, I feel certainif I stuck them to any smooth surface I would have trouble gettingthem back off in one piece. On closer observation, I see the metaldisc has small well-defined grooves in it, sort of like a recordalbum, but coarser. Could this be part of the problem? Should thisdisc be really smooth? I'm more of a neander woodworker, and this isthe first stationary sander I've ever owned, so am I missing somethinghere?Mark W

Jun 23, 2004 20 Replies

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George 22 years ago

Crudely put, but yep, the 12"/6x48 ain't the only 12" Jet out there anymore. What I get for ASSuMEd information.

Said unit is, as I described, milled with concentric circles, an undeniably deliberate act, and at the depth to which they are milled (well beyond a phonograph record) , they're not going away with sandpaper.

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12" PSA discs not sticking to Jet sander

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