Grinding Bits for Metals
Made of aluminum oxide, these bits are well suited for use on most metals and materials that are not heat sensitive.
Bits are also known as mounted points and die grinder bits. Head diameter is measured at the widest point.
Caution: As bit shank is exposed beyond 1/2", maximum safe rpm decreases significantly. Refer to ANSI standard B7.1. Use only accessories that have a greater rpm rating than the maximum speed of the grinder you choose.
For technical drawings and 3-D models, click on a part number.
Head | Abrasive | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dia. | Lg. | Max. Speed, rpm | Shape No. | Material | Bond Material | Shank Lg. | Grit (Surface Texture) | Pkg. Qty. | Pkg. | ||
1/8" Shank Dia. | |||||||||||
For Steel | |||||||||||
| 1 | 3/16" | 1/8" | 105,000 | W151 | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Blue | 1 | 00000000 | 00000 |
| 1 | 1/4" | 1/16" | 123,000 | W157 | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Blue | 1 | 00000000 | 0000 |
| 1 | 1/4" | 1/8" | 105,000 | W158 | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Blue | 1 | 00000000 | 0000 |
| 1 | 5/16" | 1/16" | 107,400 | W165 | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Blue | 1 | 00000000 | 0000 |
| 1 | 3/8" | 1/16" | 99,370 | W172 | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Blue | 1 | 00000000 | 0000 |
| 1 | 3/8" | 1/8" | 87,600 | W173 | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Blue | 1 | 00000000 | 0000 |
| 2 | 5/8" | 1/16" | 61,120 | W190 | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Blue | 1 | 00000000 | 0000 |
Head | Abrasive | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dia. | Lg. | Max. Speed, rpm | Shape No. | Material | Bond Material | Shank Lg. | Grit (Surface Texture) | Pkg. Qty. | Pkg. | ||
1/8" Shank Dia. | |||||||||||
For Steel | |||||||||||
| 6 | 1/4" | 3/32" | 105,000 | B74 | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Blue | 1 | 00000000 | 00000 |
Head | Abrasive | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dia. | Lg. | Max. Speed, rpm | Shape No. | Material | Bond Material | Shank Lg. | Grit (Surface Texture) | Pkg. Qty. | Pkg. | ||
1/8" Shank Dia. | |||||||||||
For Steel | |||||||||||
| 10 | 1/8" | 3/16" | 105,000 | B47 | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Blue | 1 | 00000000 | 00000 |
Head | Abrasive | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dia. | Lg. | Max. Speed, rpm | Shape No. | Material | Bond Material | Shank Lg. | Grit (Surface Texture) | Pkg. Qty. | Pkg. | ||
1/8" Shank Dia. | |||||||||||
For Steel | |||||||||||
| 12 | 1/4" | 1/2" | 60,000 | B54 | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Blue | 1 | 00000000 | 00000 |
Head | Abrasive | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dia. | Lg. | Max. Speed, rpm | Shape No. | Material | Bond Material | Shank Lg. | Grit (Surface Texture) | Pkg. Qty. | Pkg. | ||
1/8" Shank Dia. | |||||||||||
For Steel | |||||||||||
| 17 | 1/8" | 3/16" | 105,000 | B95 | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Blue | 1 | 00000000 | 00000 |
| 17 | 11/64" | 3/32" | 105,000 | B94 | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Blue | 1 | 00000000 | 0000 |
| 17 | 3/16" | 3/16" | 105,000 | B93 | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Blue | 1 | 00000000 | 0000 |
Grinding Bits for Stainless Steel
Bits are specially formulated to stay cool during grinding, so they won’t mar or discolor stainless steel. They are also known as mounted points and die grinder bits. Head diameter is measured at the widest point.
Caution: As bit shank is exposed beyond 1/2", maximum safe rpm decreases significantly. Refer to ANSI standard B7.1. Use only accessories that have a greater rpm rating than the maximum speed of the grinder you choose.
For technical drawings and 3-D models, click on a part number.
Head | Abrasive | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dia. | Lg. | Max. Speed, rpm | Shape No. | Shape | Material | Bond Material | Shank Lg. | Grit (Surface Texture) | Each | ||
For Stainless Steel | |||||||||||
1/8" Shank Dia. | |||||||||||
| 1 | 1/4" | 1/2" | 60,000 | B135 | Cylindrical | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Pink | 00000000 | 00000 |
| 2 | 1/4" | 5/8" | 60,000 | B53 | Flat-Top Cone | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Pink | 00000000 | 0000 |
| 3 | 7/32" | 3/8" | 68,400 | B44 | Cone | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Pink | 00000000 | 0000 |
| 6 | 3/4" | 3/16" | 50,930 | B81 | Disc | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | 100 (Smooth) Pink | 00000000 | 0000 |
Grinding Bit Sets for Metals
Each set contains a selection of grinding bits. All include bits made of aluminum oxide, which is the most common abrasive used for grinding metal. These bits are also known as mounted points and die grinder bits.
Sets for steel, stainless steel, aluminum, brass, bronze, copper, iron, and nickel contain bits made from a range of abrasive materials in different shapes and sizes. They’ll help you achieve varying levels of finish on a wide range of materials. Cotton laminate/aluminum oxide blend bits remove more material than rubber-cushioned aluminum oxide bits, and they’ll create a nicer finish than vitrified ceramic alumina bits. Bits with nylon mesh remove the least material but create the nicest finish.
Caution: As bit shank is exposed beyond 1/2", maximum safe rpm decreases significantly. Refer to ANSI standard B7.1. Use only accessories that have a greater rpm rating than the maximum speed of the grinder you choose.
Abrasive | ||||||||
|---|---|---|---|---|---|---|---|---|
| No. of Pieces | Includes | Material | Bond Material | Shank Lg. | Color | Grit (Surface Texture) | Each | |
For Steel, Aluminum, Iron | ||||||||
1/8" Shank Dia. | ||||||||
| 36 | Cardboard Block Stand; Three each 100 Grit: B53, W163, W182; Three each 60 Grit: B52, W185; Three each 80 Grit: B52, B53, B122, W163, W182, W185 | Aluminum Oxide | Vitrified Ceramic | 1 1/2" | Blue, Pink | 60 (Rough), 80 (Smooth), 100 (Smooth) | 0000000 | 000000 |
For Steel, Stainless Steel, Aluminum, Brass, Bronze, Copper, Iron, Nickel | ||||||||
1/8" Shank Dia. | ||||||||
| 72 | Cardboard Block Stand; B121 (14 total, 60-240 grit); B132 (9 total, 60-80 grit); B52 (16 total, 60-240 grit); W154 (9 total, 60-100 grit); W182 (9 total, 60-80 grit); W185 (15 total, 60-240 grit) | Aluminum Oxide Ceramic Cotton Laminate/Aluminum Oxide Blend Nylon Mesh/Aluminum Oxide Blend Nylon Mesh/Silicon Carbide Blend | Rubber Synthetic Resin Vitrified Ceramic | 1 1/2" | Black, Blue, Brown, Gray, Pink, White | 60 (Rough), 80 (Smooth), 100 (Smooth) | 0000000 | 000000 |
Miniature Long-Life Grinding Bits for Nonmetals
Made with diamond abrasive, these bits are extremely hard and last longer than tungsten carbide. They have a small shank and head for precise and intricate jobs. To extend the life of these bits and improve their finish, use a water- or oil-soluble mist or coolant. They are also known as mounted points and die grinder bits. Head diameter is measured at the widest point.
A keyless chuck (sold separately) connects these bits to rotary tools that accept a 1/8" shank diameter.
Caution: As bit shank is exposed beyond 1/2", maximum safe rpm decreases significantly. Refer to ANSI standard B7.1. Use only accessories that have a greater rpm rating than the maximum speed of the grinder you choose.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Dia. | Lg. | Max. Speed, rpm | Shape | Abrasive Material | Shank Lg. | Grit (Surface Texture) | Each | ||
For Carbide, Ceramics, Composites, Fiberglass, Glass, Plastic, Rubber | |||||||||
3/32" Shank Dia. | |||||||||
| 1 | 0.374" | 0.16" | 25,000 | Inverted Cone | Diamond | 1 5/8" | 100 (Smooth) Silver | 0000000 | 000000 |
| 2 | 0.051" | 0.051" | 70,000 | Ball | Diamond | 1 3/4" | 100 (Smooth) Silver | 0000000 | 00000 |
| 2 | 0.075" | 0.075" | 45,000 | Ball | Diamond | 1 5/8" | 100 (Smooth) Silver | 0000000 | 00000 |
| 2 | 0.091" | 0.091" | 40,000 | Ball | Diamond | 1 5/8" | 100 (Smooth) Silver | 0000000 | 00000 |
| 2 | 0.138" | 0.138" | 25,000 | Ball | Diamond | 1 5/8" | 100 (Smooth) Silver | 0000000 | 00000 |
| 2 | 0.169" | 0.169" | 25,000 | Ball | Diamond | 1 5/8" | 100 (Smooth) Silver | 0000000 | 00000 |
| 3 | 0.094" | 0.157" | 25,000 | Cylindrical | Diamond | 1 5/8" | 100 (Smooth) Silver | 0000000 | 00000 |
| 3 | 0.181" | 0.157" | 25,000 | Cylindrical | Diamond | 1 5/8" | 100 (Smooth) Silver | 0000000 | 00000 |
| 4 | 0.098" | 0.393" | 25,000 | Taper | Diamond | 1 3/8" | 100 (Smooth) Silver | 0000000 | 00000 |
| 5 | 0.123" | 0.354" | 25,000 | Taper | Diamond | 1 3/8" | 100 (Smooth) Silver | 0000000 | 00000 |
Swap out accessories on your Dremel without tools.
| For Shank Dia. | Manufacturer Model Number | For Manufacturer Model Number | Mounting Hole Thread Size  | Body Material | Jaw Material | Each | |
| 1/32"-1/8" | 4486 | 100, 200, 212, 225, 275, 285, 300, 395, 398, 400, 575, 750, 770, 780, 800, 3000, 4000, 7700, 8050, 8200, 8220 | 1/4"-40 | Steel | Steel | 0000000 | 00000 |
Replaceable-Cap Sanding Bits for Countersunk Holes
Choose a bit with the same angle as your countersink to debur the inside of the hole. Slip a cap onto the head of a shank (sold separately).
For technical drawings and 3-D models, click on a part number.
Caps | Required Shanks | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dia. | Lg. | For Shank Dia. | Max. Speed, rpm | Abrasive Material | Abrasive Backing Material | For Use On | For Use With | Each | Each | ||
60° Countersink Angle | |||||||||||
| 3/4" | 3/4" | 1/4" | 20,000 | Aluminum Oxide | Cloth | Steel, Wood | Drills, Grinders for Bits and Burs | 00000000 | 00000 | 00000000 | 000000 |
| 1" | 1" | 1/4" | 18,000 | Aluminum Oxide | Cloth | Steel, Wood | Drills, Grinders for Bits and Burs | 00000000 | 0000 | 00000000 | 00000 |
90° Countersink Angle | |||||||||||
| 3/4" | 1/2" | 1/4" | 20,000 | Aluminum Oxide | Cloth | Steel, Wood | Drills, Grinders for Bits and Burs | 00000000 | 0000 | 00000000 | 00000 |
| 1" | 11/16" | 1/4" | 18,000 | Aluminum Oxide | Cloth | Steel, Wood | Drills, Grinders for Bits and Burs | 00000000 | 0000 | 00000000 | 00000 |
| 1 1/2" | 1 1/16" | 1/4" | 10,000 | Aluminum Oxide | Cloth | Steel, Wood | Drills, Grinders for Bits and Burs | 00000000 | 0000 | 00000000 | 00000 |