Aluminum Disc Master Base Lap Plate 6" x 1/2" Arbor Grinding Pads for Flat Abrasive Wheels/Backer-Disc/Slant Cabber Polishing Machine - 1 Pack

Quality Master Disc

Disc arrived thick, heavy, and flat. I used a 1/2 inch bolt and appropriate nuts and washers, mounted a diamond wheel, and was easily able to shape some local mineral slabs into passable cabs by spinning the wheel in a drill press. I have no other experience doing this, except to watch a demo of a guy doing the same thing with a 1300 dollar Cab King at a local mineral show. My set up delivered a pleasing result and I am very happy with it. If you want to play at lapidary without a big investment this is a great purchase. If you do, please use a dust mask and eye protection. Silicosis is no joke and grinding makes a lot more dust than you can see.

Very nice back plate. I have it behind diamond polishing plates in my buffer. I use it to polish carbide tool bits. Works great. Seems well balanced and it is fully solid (not hollow as another reviewer said). Make sure you buy the right version.

I have bought three of these so far. They are well balanced. I use this was diamond discs for sand gravers. you can attach this to your drill press with a half inch mandrel.

I purchased to for a "maker" project I was doing, so I did not use it for its intended purpose. That said, it's a nice quality piece of aluminum. It's well made, lightweight (as you'd expect with aluminum) and well balanced if used for its intended purpose. I took off a star because mine had some blemishes when it arrived. But these are nothing that would affect its performance if used for its intended purpose.

This is what it is. An aluminum disk that will be used as a sanding wheel on a grinder with some stick on 6” sandpaper I ordered with it.

I ordered this Aluminum Disc to use as a base for sandpaper discs on a drill press. I had previously ordered another brand and discovered that, while the quality was excellent, only one side was usable and the other side was hollowed out. These discs, however, are flat both front and back, giving you two usable sides. And the quality is excellent. Great value for the money!

This disc works as it should. I use it instead of costly acrylic disks on a flat lap with polishing discs on top.

the product is actually a 6" lap, so no use if you want 8"

Serviceable master lap, so will keep, but definitely not as described. I was sent a hollow one, not one that is flat on both sides, even though the photo description definitely claims both sides are flat.