A38 Grinding Bits | McMaster-Carr

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Shape

Cylinder

System of Measurement

Inch

Head Diameter

Shank Diameter

1/4"

Head Length

For Use On

Grit

Shape Number

Maximum Rotation Speed

Abrasive Material

Color

Surface Texture

Grit Rating

Material

Shank Length

For Use With

Grinders for Bits and Burs

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

Yes

Rotation Speed

30,000 rpm to 99,999 rpm

REACH

RoHS

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

Abrasive Bond 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







				1/4" Diameter Shank

				1	1"	1"	34,500	A38	Aluminum Oxide	Vitrified Clay	1 1/2"	36 (Rough) Blue-Gray, 60 (Rough) Orange, 120 (Smooth) Blue	5	4522A254	000000

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"	1"	34,500	A38	Aluminum Oxide	Rubber	1 1/2"	46 (Rough) Silver, 80 (Smooth) Silver, 120 (Smooth) Silver, 180 (Smooth) Silver	4919A601	000000


				For Aluminum, Brass, and Bronze







								1/4" Diameter Shank

								1	1"	1"	34,500	A38	Silicon Carbide	Rubber	1 1/2"	46 (Rough) Silver, 80 (Smooth) Silver, 120 (Smooth) Silver, 220 (Extra Smooth) Silver	4919A701	00000

Hex-Shank Grinding Bits for Metals


Style 1	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.

Cylinder


Style 1	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

				1	1"	1"	34,500	A38	Aluminum Oxide	Vitrified Ceramic	1 1/2"	60 (Rough) Gray	4087A17	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.

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







				1/4" Diameter Shank

				1	1"	1"	34,500	A38	Aluminum Oxide	Vitrified Ceramic	1 1/2"	60 (Rough) Pink	44005A35	00000