W187 Grinding Bits | McMaster-Carr

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20,000 rpm to 29,999 rpm

30,000 rpm to 99,999 rpm

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

Exempt

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Material

Shape Number

Maximum Rotation Speed

Shank Length

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Grinders for Bits and Burs

Abrasive Material

5 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.

Cylinder

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







				1/8" Diameter Shank

				1	1/2"	1"	20,620	W187	Aluminum Oxide	Vitrified Clay	1 1/2"	36 (Rough) Blue-Gray, 60 (Rough) Orange, 120 (Smooth) Blue	5	4522A137	00000




						1/4" Diameter Shank

						1	1/2"	1"	40,500	W187	Aluminum Oxide	Vitrified Clay	1 1/2"	36 (Rough) Blue-Gray, 60 (Rough) Orange, 120 (Smooth) Blue	5	4522A221	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.

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







				1/4" Diameter Shank

				1	1/2"	1"	40,500	W187	Aluminum Oxide	Rubber	1 1/2"	46 (Rough) Brown, 70 (Smooth) Black, 120 (Smooth) Green, 180 (Smooth) Red	4919A561	000000


				For Aluminum, Brass, and Bronze







								1/4" Diameter Shank

								1	1/2"	1"	40,500	W187	Silicon Carbide	Rubber	1 1/2"	46 (Rough) Brown, 90 (Smooth) Black, 120 (Smooth) Green, 240 (Extra Smooth) Red	4919A836	00000

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.	Grit (Surface Texture)		Each
For Steel, Stainless Steel, Aluminum, Brass, Copper, Iron, Nickel, and Titanium







				1/4" Diameter Shank

				1	1/2"	1"	36,950	W187	Aluminum Oxide/Cotton Laminate Blend	Rubber	1 1/2"	80 (Smooth) Blue-Gray	4806N131	00000