W185 Grinding Bits | McMaster-Carr

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Grinders for Bits and Burs

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30,000 rpm to 99,999 rpm

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Abrasive Bond Material

12 Products

Nylon Mesh Cushioned Sanding Bits

Style D

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.

1/8" Dia. × 1 1/2" Lg. Shank

Style D

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 D



	W185	1/2"	1/2"	Coarse	Rough	34,500	Gray	Aluminum Oxide	Nylon Mesh	Steel, Wood	Drills, Grinders for Bits and Burs	4630A192	00000


	W185	1/2"	1/2"	Medium	Smooth	34,500	Gray	Aluminum Oxide	Nylon Mesh	Steel, Wood	Drills, Grinders for Bits and Burs	4630A191	0000
	W185	1/2"	1/2"	Fine	Extra Smooth	34,500	Gray	Silicon Carbide	Nylon Mesh	Steel, Wood	Drills, Grinders for Bits and Burs	4630A193	0000

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.

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.

Cylinder

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







				1/8" Diameter Shank

				1	1/2"	1/2"	34,500	W185	Aluminum Oxide	Rubber	1 1/2"	46 (Rough) Brown, 70 (Smooth) Black, 120 (Smooth) Green, 180 (Smooth) Red	4919A321	000000




						1/4" Diameter Shank

						1	1/2"	1/2"	61,500	W185	Aluminum Oxide	Rubber	1 1/2"	46 (Rough) Brown, 70 (Smooth) Black, 120 (Smooth) Green, 180 (Smooth) Red	4919A531	00000


						For Aluminum, Brass, and Bronze







										1/8" Diameter Shank

										1	1/2"	1/2"	34,500	W185	Silicon Carbide	Rubber	1 1/2"	46 (Rough) Brown, 90 (Smooth) Black, 120 (Smooth) Green, 240 (Extra Smooth) Red	4919A891	00000




												1/4" Diameter Shank

												1	1/2"	1/2"	61,500	W185	Silicon Carbide	Rubber	1 1/2"	46 (Rough) Brown, 90 (Smooth) Black, 120 (Smooth) Green, 240 (Extra Smooth) Red	4919A826	00000

Grinding Bits for Metals

Style 2

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.

Cylinder

Style 2

		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







				1/8" Diameter Shank

				2	1/2"	1/2"	34,500	W185	Aluminum Oxide	Vitrified Clay	1 1/2"	46 (Rough) Blue-Gray, 60 (Rough) Orange, 120 (Smooth) Blue	5	4522A135	00000




						1/4" Diameter Shank

						2	1/2"	1/2"	61,500	W185	Aluminum Oxide	Vitrified Clay	1 1/2"	46 (Rough) Blue-Gray, 60 (Rough) Orange, 120 (Smooth) Blue	5	4522A218	0000

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.

Cylinder

Style

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







				1/8" Diameter Shank

				1	1/2"	1/2"	34,500	W185	Aluminum Oxide	Vitrified Ceramic	1 1/2"	80 (Smooth) Pink	44005A59	00000




						1/4" Diameter Shank

						1	1/2"	1/2"	61,500	W185	Aluminum Oxide	Vitrified Ceramic	1 1/2"	80 (Smooth) Pink	44005A61	0000

Cotton-Laminate Grinding Bits for Metals

Style

Made of cotton fiber layers embedded with aluminum-oxide grains, these bits grind and finish in one step. They’re ideal for light deburring, blending, and finishing metal. These grinding bits remove material more efficiently than rubber-cushioned bits. While grinding, they resist the buildup of aluminum, brass, bronze, and other nonferrous metal. They’re also known as mounted points and die grinder bits. Head diameter is measured at the widest point.

Cylinder

Style

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







				1/8" Diameter Shank

				1	1/2"	1/2"	34,500	W185	Aluminum Oxide/Cotton Laminate Blend	Rubber	1 1/2"	80 (Smooth) Blue-Gray, 120 (Smooth) Blue-Gray	4806N15	00000