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Polishing Stones for EDM Scale Removal
Remove the tough scale left by the EDM (electrical discharge machining) process. These stones are harder than standard aluminum oxide polishing stones but are not so hard that they will scratch or gouge your workpiece. They abrade slowly, so you can control how much material you remove.
Polish by hand or use these stones in power tools with a compatible holder. You’ll also need lubricant.
Straight Square
Stones | Hand-Held Stone Holders | Stone Holders for Power Tools | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Thick. | Color | Lubrication | Each | Each | Each | |||
Aluminum Oxide—For Use On Steel | ||||||||||
100 Grit (For Smooth Finish) | ||||||||||
| 6" | 5/32" | 5/32" | Brown | Required | 000000000 | 00000 | 000000000 | 000000 | 0000000 | 000000 |
| 6" | 1/4" | 1/4" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 3/8" | 3/8" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
120 Grit (For Smooth Finish) | ||||||||||
| 6" | 5/32" | 5/32" | Brown | Required | 000000000 | 0000 | 000000000 | 00000 | 0000000 | 00000 |
| 6" | 1/4" | 1/4" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 3/8" | 3/8" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
150 Grit (For Smooth Finish) | ||||||||||
| 6" | 5/32" | 5/32" | Brown | Required | 000000000 | 0000 | 000000000 | 00000 | 0000000 | 00000 |
| 6" | 1/4" | 1/4" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 3/8" | 3/8" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
180 Grit (For Smooth Finish) | ||||||||||
| 6" | 5/32" | 5/32" | Brown | Required | 000000000 | 0000 | 000000000 | 00000 | 0000000 | 00000 |
| 6" | 1/4" | 1/4" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 3/8" | 3/8" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
220 Grit (For Smooth Finish) | ||||||||||
| 6" | 5/32" | 5/32" | Brown | Required | 000000000 | 0000 | 000000000 | 00000 | 0000000 | 00000 |
| 6" | 1/4" | 1/4" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 3/8" | 3/8" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
320 Grit (For Extra Smooth Finish) | ||||||||||
| 6" | 5/32" | 5/32" | Brown | Required | 000000000 | 0000 | 000000000 | 00000 | 0000000 | 00000 |
| 6" | 1/4" | 1/4" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 3/8" | 3/8" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
400 Grit (For Extra Smooth Finish) | ||||||||||
| 6" | 5/32" | 5/32" | Brown | Required | 000000000 | 0000 | 000000000 | 00000 | 0000000 | 00000 |
| 6" | 1/4" | 1/4" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 3/8" | 3/8" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
600 Grit (For Polished Finish) | ||||||||||
| 6" | 5/32" | 5/32" | Brown | Required | 000000000 | 0000 | 000000000 | 00000 | 0000000 | 00000 |
| 6" | 1/4" | 1/4" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 3/8" | 3/8" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
800 Grit (For Polished Finish) | ||||||||||
| 6" | 5/32" | 5/32" | Brown | Required | 000000000 | 0000 | 000000000 | 00000 | 0000000 | 00000 |
| 6" | 1/4" | 1/4" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 3/8" | 3/8" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
1000 Grit (For Polished Finish) | ||||||||||
| 6" | 5/32" | 5/32" | Brown | Required | 000000000 | 0000 | 000000000 | 00000 | 0000000 | 00000 |
| 6" | 1/4" | 1/4" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 3/8" | 3/8" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
1200 Grit (For Polished Finish) | ||||||||||
| 6" | 5/32" | 5/32" | Brown | Required | 000000000 | 0000 | 000000000 | 00000 | 0000000 | 00000 |
| 6" | 1/4" | 1/4" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 3/8" | 3/8" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
Straight Rectangular
Stones | Hand-Held Stone Holders | Stone Holders for Power Tools | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Thick. | Color | Lubrication | Each | Each | Each | |||
Aluminum Oxide—For Use On Steel | ||||||||||
100 Grit (For Smooth Finish) | ||||||||||
| 6" | 1/4" | 1/16" | Brown | Required | 000000000 | 00000 | 000000 | 00 | 0000000 | 000000 |
| 6" | 1/4" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 00000 | 0000000 | 0000 |
| 6" | 1/2" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/2" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/4" | Brown | Required | 000000000 | 0000 | 000000000 | 0000 | 0000000 | 00000 |
| 6" | 1" | 1/4" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
120 Grit (For Smooth Finish) | ||||||||||
| 6" | 1/4" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/4" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/2" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/4" | Brown | Required | 000000000 | 0000 | 000000000 | 0000 | 0000000 | 00000 |
| 6" | 1" | 1/4" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
150 Grit (For Smooth Finish) | ||||||||||
| 6" | 1/4" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/4" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/2" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/4" | Brown | Required | 000000000 | 0000 | 000000000 | 0000 | 0000000 | 00000 |
| 6" | 1" | 1/4" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
180 Grit (For Smooth Finish) | ||||||||||
| 6" | 1/4" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/4" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/2" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/4" | Brown | Required | 000000000 | 0000 | 000000000 | 0000 | 0000000 | 00000 |
| 6" | 1" | 1/4" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
220 Grit (For Smooth Finish) | ||||||||||
| 6" | 1/4" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/4" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/2" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/4" | Brown | Required | 000000000 | 0000 | 000000000 | 0000 | 0000000 | 00000 |
| 6" | 1" | 1/4" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
320 Grit (For Extra Smooth Finish) | ||||||||||
| 6" | 1/4" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/4" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/2" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/4" | Brown | Required | 000000000 | 0000 | 000000000 | 0000 | 0000000 | 00000 |
| 6" | 1" | 1/4" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
400 Grit (For Extra Smooth Finish) | ||||||||||
| 6" | 1/4" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/4" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/2" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/4" | Brown | Required | 000000000 | 0000 | 000000000 | 0000 | 0000000 | 00000 |
| 6" | 1" | 1/4" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
600 Grit (For Polished Finish) | ||||||||||
| 6" | 1/4" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/4" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/2" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/4" | Brown | Required | 000000000 | 0000 | 000000000 | 0000 | 0000000 | 00000 |
| 6" | 1" | 1/4" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 000000 | 00 |
800 Grit (For Polished Finish) | ||||||||||
| 6" | 1/4" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/4" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/2" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/4" | Brown | Required | 000000000 | 0000 | 000000000 | 0000 | 0000000 | 00000 |
| 6" | 1" | 1/4" | Brown | Required | 000000000 | 00000 | 000000 | 00 | 000000 | 00 |
1000 Grit (For Polished Finish) | ||||||||||
| 6" | 1/4" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/4" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/2" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/4" | Brown | Required | 000000000 | 0000 | 000000000 | 0000 | 0000000 | 00000 |
| 6" | 1" | 1/4" | Brown | Required | 000000000 | 00000 | 000000 | 00 | 000000 | 00 |
1200 Grit (For Polished Finish) | ||||||||||
| 6" | 1/4" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/4" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/16" | Brown | Required | 000000000 | 0000 | 000000 | 00 | 0000000 | 00000 |
| 6" | 1/2" | 1/8" | Brown | Required | 000000000 | 0000 | 00000000 | 0000 | 0000000 | 0000 |
| 6" | 1/2" | 1/4" | Brown | Required | 000000000 | 0000 | 000000000 | 0000 | 0000000 | 00000 |
| 6" | 1" | 1/4" | Brown | Required | 000000000 | 00000 | 000000 | 00 | 000000 | 00 |