90 Grit Grinding Bits | McMaster-Carr

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Silicon Carbide

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Silicon Carbide

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Abrasive Bond Material

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10,000 rpm to 19,999 rpm

20,000 rpm to 29,999 rpm

30,000 rpm to 99,999 rpm

100,000 rpm or greater

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

DFARS Specialty Metals

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25 Products

Rubber-Cushioned Abrasive Grinding Bits for Metals


Style 1	Style 2	Style 3	Style 4	Style 5	Style 9	Style 10	Style 11

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

1

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.	Grit (Surface Texture)		Each
For Aluminum, Brass, and Bronze







				1/8" Diameter Shank

				1	1/8"	3/8"	105,000	W145	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A811	000000


				1	3/16"	1/2"	70,500	W154	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A821	00000
				1	1/4"	1/4"	81,370	W160	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A831	00000
				1	1/4"	1/2"	60,000	W163	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A841	00000
				1	1/4"	3/4"	45,900	W164	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A851	00000
				1	3/8"	3/8"	54,000	W175	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A861	00000
				1	3/8"	1"	26,250	W178	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A871	00000
				1	1/2"	3/8"	41,020	W184	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A881	00000
				1	1/2"	1/2"	34,500	W185	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A891	00000




						1/4" Diameter Shank

						1	3/8"	1/2"	81,000	W176	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A816	00000


						1	1/2"	1/2"	61,500	W185	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A826	00000
						1	1/2"	1"	40,500	W187	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A836	00000
						1	3/4"	1"	34,500	W205	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A846	00000
						1	1"	1"	25,500	W220	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A856	00000
						1	2"	1"	19,100	W242	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A866	00000

Barrel

Style

9

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.	Grit (Surface Texture)		Each
For Aluminum, Brass, and Bronze







				1/4" Diameter Shank

				9	1/4"	3/4"	76,500	A24	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A886	000000

Cone


Style 5	Style 10	Style 11

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.	Grit (Surface Texture)		Each
For Aluminum, Brass, and Bronze







				1/4" Diameter Shank

				5	3/8"	3/4"	81,000	B52	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A896	000000


				5	1/2"	3/4"	61,120	B42	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A916	00000
				5	11/16"	1 1/4"	48,000	A12	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A926	00000
				10	7/8"	2"	19,860	A11	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A936	00000
				11	1"	2 3/4"	16,100	A3	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A946	00000

Inverted Cone

Style

3

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.	Grit (Surface Texture)		Each
For Aluminum, Brass, and Bronze







				1/8" Diameter Shank

				3	5/16"	3/8"	68,400	B104	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A931	000000

Taper

Style

2

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.	Grit (Surface Texture)		Each
For Aluminum, Brass, and Bronze







				1/8" Diameter Shank

				2	1/4"	5/8"	60,000	B53	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A921	000000

Ball

Style

4

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.	Grit (Surface Texture)		Each
For Aluminum, Brass, and Bronze







				1/8" Diameter Shank

				4	3/16"	3/16"	104,250	B123	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A911	000000




						1/4" Diameter Shank

						4	1/2"	1/2"	76,390	B121	Silicon Carbide	Rubber	1 1/2"	90 (Smooth) Black	4919A876	00000

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The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)