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Forum topic by JoshNZ posted 12-12-2018 08:16 PM 743 views 0 times favorited 19 replies Add to Favorites Watch
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JoshNZ

133 posts in 1523 days


12-12-2018 08:16 PM

Topic tags/keywords: power sanding sanding discs sanding pad

What’s the most economical thing to do as far as sanding pads goes, (the drill/mandrel foam pad type). I’m looking at buying a set from a local supplier here but a bit apprehensive about being locked into buying the expensive velcro backed pads for the rest of eternity.

Is there any quick/economical way to make your own discs that mount to a pad somehow? Id prefer to buy sandpaper in bulk if there was a way to punch it and secure it easily even if I had to spend a couple hours per run. Buying 75mm discs for 90c each seems like going too far the other way.

Any thoughts or ideas?
Thanks in advance


19 replies so far

View MrWolfe's profile

MrWolfe

253 posts in 577 days


#1 posted 12-12-2018 08:29 PM

i’ve found some knock off brands on Amazon that sell hook and loop backed sand paper that fit my Rockler R.O. sander, my Skilsaw Octosander and some of those soft foam velcro sanding blocks. They may be a lessor quality than the name brand sandpaper but I carefully found the ones that fit my sander and they are a lot less expensive. 60 sheets for the same price as 10.
Good luck

View pontic's profile

pontic

697 posts in 1062 days


#2 posted 12-12-2018 08:36 PM

Make a mandrel out of old dense foam mouse pads and an old rubber sanding mandrel and then use double sided tape to put the home made sanding disks on the sander.

-- Illigitimii non carburundum sum

View RobHannon's profile

RobHannon

301 posts in 984 days


#3 posted 12-12-2018 08:37 PM

You could buy PSA sandpaper sheets and either cut out by hand or get a punch the size you want. I’d recommend a tool called a wad punch or a hollow punch. Very simple cutter that you will be able to clean adhesive off of when you are done a batch. Same concept could be made very cheaply with an appropriately sized piece of pipe with a bevel sharpened around the radius, it will just require more frequent resharpening.

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JoshNZ

133 posts in 1523 days


#4 posted 12-12-2018 08:45 PM

I do have a center lathe also so could quite easily turn a punch and harden it for punching discs.

Double sided tape is not a bad idea I was also thinking the 3m spray adhesive might work. Do they have enough holding power for the duration of the sandpapers life? I guess you’d have a mandrel for each grit rather than swapping sheets on the end of a mandrel for this technique.

If you spray adhesive or double sided tape on the face of the rubber foam pad what is a suitable material that won’t break down? I imagine mouse pads/neoprene would fall apart easily

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RobHannon

301 posts in 984 days


#5 posted 12-12-2018 08:56 PM

EVA foam probably would hold up for a while. Butyl rubber would as well. Leather could work if a stiff backing is good. Any of the soft foams/rubbers are going to wear out from use regardless of the adhesive.

View Wildwood's profile

Wildwood

2696 posts in 2588 days


#6 posted 12-13-2018 01:28 PM

Not sure where you have shopped but might take a look at these places:

http://vinceswoodnwonders.com/store/

https://www.woodworkingshop.com/abrasive-discs/

-- Bill

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OSU55

2381 posts in 2443 days


#7 posted 12-13-2018 01:37 PM

Down a rabbit trail – using hand planes will pretty much retire your ros. Mine stays on the shelf the majority of the time, and I dont have to listen to it run, wait for the hand numbness to go away, or worry about the dust created.

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TheDane

5666 posts in 4117 days


#8 posted 12-13-2018 01:58 PM

Down a rabbit trail – using hand planes will pretty much retire your ros.

You can’t use hand planes on the lathe.

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

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RobHannon

301 posts in 984 days


#9 posted 12-13-2018 02:09 PM



Down a rabbit trail – using hand planes will pretty much retire your ros.

You can t use hand planes on the lathe.

- TheDane


Sure you can….. once.

View johnstoneb's profile

johnstoneb

3123 posts in 2626 days


#10 posted 12-13-2018 02:35 PM

I just bought a package of 50 Gator pads at Lowes. At $22 this works out to be .44 per disc. I don’t know how they are going to wear as I have only used them to sand epoxy paint and they load up before wearing out. My more expensive pads were loading up the same way.

-- Bruce, Boise, ID

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JoshNZ

133 posts in 1523 days


#11 posted 12-14-2018 04:08 AM

Anything from the US to NZ seems to cost an arm and a leg for shipping these days. For consumer orders anyway. Can guarantee it won’t be here before Christmas =(.

This is as far I got with the hacked pads yesterday. Haven’t done the punch yet will just wear out a pair of scissors for now. I glued up one pad with spray adhesive I’d say the foam is going to go with the paper when its times up. Prob not the best material I might need to order something more dense

View OSU55's profile

OSU55

2381 posts in 2443 days


#12 posted 12-14-2018 01:03 PM

Oops….didnt realize this was in the turning forum. I 2nd the recommendation for Vince’s woodnwonders, but with a NZ locale doubt that it helps. Not sure what size turnings you are doing but I find 2” dia pads with 2-3/8” discs handles up to the 14” dia turnings Ive done, and the smaller size may be cheaper to use.

Wish posters would state locale in initial posting – I cant make source recommendations for those outside the US.

View RobHannon's profile

RobHannon

301 posts in 984 days


#13 posted 12-14-2018 03:03 PM



Anything from the US to NZ seems to cost an arm and a leg for shipping these days. For consumer orders anyway. Can guarantee it won t be here before Christmas =(.

This is as far I got with the hacked pads yesterday. Haven t done the punch yet will just wear out a pair of scissors for now. I glued up one pad with spray adhesive I d say the foam is going to go with the paper when its times up. Prob not the best material I might need to order something more dense

- JoshNZ

Question, the black mark on the T nut, is that a tack weld? Sharp looking sanding pad mandrels by the way.

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JoshNZ

133 posts in 1523 days


#14 posted 12-14-2018 07:47 PM

No it’s just spilled threadlock. I considered tacking them but the bolt or nut was zinc plated I think, it usually ends up on the tungsten X(.

I’ll play around with the sizes thanks for the suggestion.

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JoshNZ

133 posts in 1523 days


#15 posted 12-14-2018 10:40 PM

I’m sure its obvious but it is a piece of scrap with a hole for the T nut bored into it, then a bolt with a nut and washer on it, screwed into the T nut from the other side. Then I’ve backed the nut back down the bolt so it clamps against the wood, cut the head of the bolt off, and mounted it in a Jacobs chuck on the lathe and turned to shape.

I trimmed the foam on the next pads with a razor blade with the lathe turning at 50RPM or so, made a much nicer finish than the chisel did on that first one. All seems to work ok, I’m just not sure on the life of that foam I would like to find something more sealed (butyl rubber as someone suggested probably), and still not sure how the spray adhesive is going to work for swapping discs. Fingers crossed

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