If you can i recommend finding a cheap bench grinder that you can use as a dedicated disc sander to avoid having to keep changing from sanding disc do. Very simple build give it a try if you want.

Multitool 8 In 120v Bench Grinder W 2 X 48 Belt Sander Attachment Mitre Table And Metal Working Belt Disc Kit
Bench grinder sanding disc. For pricing and availability. Porter cable restorer silicon carbide 3 in 80 grit grindingsandingpolishing wheel. Wood grinding wheel tungsten carbide grinding wheel grinder shaping disc carving abrasive disc for sanding carving shaping polishing angle grinder attachment tool. Disc grinders are benchtop tools that have a round flat surface used to shape and finish metal. For pricing and availability. Stack as many discs on at a time for the desired finish and removal rate.
If you have disc on it ie aluminum plate with sandpaper it shouldnt be dangerous. Safer than a wire wheel with a much better finish. 400w heavy duty 90 electric bench sander grinder belt disc sanding machine. Bucktool belt disc sander 4 in. Using the side of the stone grinding wheel could result in it blowing up in your face smacking you with some nice chunks of stone moving about 90 miles an hour. Belt and 6 in.
Dayton combination belt and bench grinder 120v 49h006 50 out of 5 stars 2 tacklife belt sander 318 inch with 13pcs sanding belts bench sander with variable speed control fixed screw clamps dust box vacuum adapters 10feet 3 meters length power cord psfs1a. Stone grinding wheels arent designed for side load as a general rule. Disc sander benchtop with 34hp direct drive motor and portable al base bd4603 45 out of 5 stars 88 15999 159. The very fine grade bench grinder discs are packaged 10 to a pack and the medium grade bench grinder discs are packaged 5 to a pack. Industrial belt sanders are used for shaping and finishing wood plastic and composites. Dewalt aluminum oxide 14.
Combination beltdisc sanders and grinders are used for sanding grinding deburring and contouring. Coceca 20pcs flap discs sanding grinding wheels 4 1 2 inches for angle grinder type 27 aluminum oxide abrasive40 60 80 120 grits by coceca 1999 19. 3m paint and rust stripper silicon carbide 4 in paint stripping disc. Heavy duty electrical bench sander belt disc sanding grinding machine 90. Disc and belt sanders are used on wood and generally operate at higher speeds than grinders which are used with metal workpieces. One disc is flexible when run alone.
Online shopping for bench pedestal grinding wheels abrasive wheels discs from a great selection at industrial scientific store.