A5 Grinding Bits | McMaster-Carr

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30,000 rpm to 99,999 rpm

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10 Products

Grinding Bits for Metals

Style

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.

Cone

Style

		Head				Abrasive
	Style	Dia.	Lg.	Max. Rotation Speed, rpm	Shape No.	Material	Bond Material	Shank Lg.	Choose a Grit (Surface Texture)	Pkg. Qty.		Pkg.
For Steel, Stainless Steel, and Iron







				1/4" Diameter Shank

				14	3/4"	1 1/8"	45,000	A5	Aluminum Oxide	Vitrified Clay	1 1/2"	36 (Rough) Blue-Gray , 60 (Rough) Orange , 120 (Smooth) Blue	5	00000000	000000

Nylon Mesh Cushioned Sanding Bits

Style C

The abrasive-embedded mesh construction gives you more control over sanding pressure, creating finer and more consistent finishes in small, recessed, and hard-to-reach areas.

1/4" Dia. × 1 1/2" Lg. Shank

Style C

Coarse Grade—Coarse grade is for aggressive deburring and cleaning.

Medium Grade—Medium grade is for deburring and polishing.

Fine Grade—Fine grade is for light blending and finishing.

	Dia.	Lg.	Nylon Mesh Grade	For Finish	Max. Rotation Speed, rpm	Color	Abrasive Material	Abrasive Backing Material	For Use On	For Use With		Each
Style C



	A5	3/4"	1 1/8"	Coarse	Rough	45,000	Gray	Aluminum Oxide	Nylon Mesh	Steel, Wood	Drills, Grinders for Bits and Burs	00000000	000000


	A5	3/4"	1 1/8"	Medium	Smooth	45,000	Gray	Aluminum Oxide	Nylon Mesh	Steel, Wood	Drills, Grinders for Bits and Burs	00000000	00000
	A5	3/4"	1 1/8"	Fine	Extra Smooth	45,000	Gray	Silicon Carbide	Nylon Mesh	Steel, Wood	Drills, Grinders for Bits and Burs	00000000	00000

Grinding Bits for Stainless Steel

Style

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.

Barrel

Style

Zirconia Alumina Abrasive—Zirconia alumina bits grind faster and last longer than aluminum oxide bits.

		Head				Abrasive
	Style	Dia.	Lg.	Max. Rotation Speed, rpm	Shape No.	Material	Bond Material	Shank Lg.	Grit (Surface Texture)		Each
For Stainless Steel







				1/4" Diameter Shank

				7	3/4"	1 1/8"	45,000	A5	Aluminum Oxide	Vitrified Ceramic	1 1/2"	60 (Rough) Pink	00000000	00000


				7	3/4"	1 1/8"	45,000	A5	Zirconia Alumina	Synthetic Resin	1 1/2"	30 (Rough) Gray	00000000	0000

High-Performance Grinding Bits for Metals

Style

Made of aluminum oxide ceramic, these bits prevent material and heat buildup better than bits made of boron nitride and aluminum oxide when used on steel, stainless steel, iron, and titanium. They also last longer than boron nitride bits, so they’re the best choice for high-volume applications. Also known as mounted points and die grinder bits.

Head diameter is measured at the widest point.

Cone

Style

		Head				Abrasive
	Style	Dia.	Lg.	Max. Rotation Speed, rpm	Shape No.	Material	Bond Material	Shank Lg.	Grit (Surface Texture)		Each
For Iron, Stainless Steel, Steel, and Titanium







				1/4" Diameter Shank

				7	3/4"	1 1/8"	38,550	A5	Ceramic Alumina	Vitrified Clay	1 1/2"	80 (Smooth) Green	0000000	00000

Rubber-Cushioned Abrasive Grinding Bits for Metals

Style

The abrasive grains in these bits are blended with rubber, which cushions during grinding to produce a smoother surface texture than other bits with similar grits. Bits are also known as mounted points and die grinder bits. Head diameter is measured at the widest point.

Cone

Style

For Steel—Bits for steel are aluminum oxide, which is the most common abrasive used in grinding metal.

For Aluminum, For Brass, and For Bronze—Bits for aluminum, brass, and bronze are silicon carbide, which cuts through soft metals without generating much heat or causing material buildup.

		Head				Abrasive
	Style	Dia.	Lg.	Max. Rotation Speed, rpm	Shape No.	Material	Bond Material	Shank Lg.	Choose a Grit (Surface Texture)		Each
For Steel







				1/4" Diameter Shank

				5	3/4"	1 1/8"	35,000	A5	Aluminum Oxide	Rubber	1 1/2"	46 (Rough) Silver , 80 (Smooth) Silver , 120 (Smooth) Silver , 180 (Smooth) Silver	00000000	000000


				For Aluminum, Brass, and Bronze







								1/4" Diameter Shank

								5	3/4"	1 1/8"	35,000	A5	Silicon Carbide	Rubber	1 1/2"	46 (Rough) Silver , 80 (Smooth) Silver , 120 (Smooth) Silver , 220 (Extra Smooth) Silver	00000000	00000

Hex-Shank Grinding Bits for Metals


Style 5	Hex Shank

Use bits in any drill chuck that accepts a _1/4" hex shank.

Bits are aluminum oxide, which is the most common abrasive used in grinding metal. They are also known as mounted points and die grinder bits. Head diameter is measured at the widest point.

Cone


Style 5	Hex Shank

		Head				Abrasive
	Style	Dia.	Lg.	Max. Rotation Speed, rpm	Shape No.	Material	Bond Material	Shank Lg.	Grit (Surface Texture)		Each
For Steel and Iron







				1/4" Hex Shank

				5	3/4"	1 1/8"	45,000	A5	Aluminum Oxide	Vitrified Ceramic	1 1/2"	60 (Rough) Gray	0000000	00000