Grinding Bit Sets | McMaster-Carr

	Shank Diameter Shank Diameter

1/8"

1/4"

	For Use On For Use On

	Number of Pieces Number of Pieces

	Grit Grit

60 grit

120-240 grit

	Surface Texture Surface Texture

Rough

Smooth

Extra Smooth

	Color Color

	Red		Orange
	Gray		Brown

	Abrasive Material Abrasive Material

Aluminum Oxide

Aluminum Oxide/Silicon
Carbide Blend

	Abrasive Bond Material Abrasive Bond Material

Vitrified Clay

Rubber

Vitrified Ceramic

	Maximum Speed Maximum Speed

21,000 rpm

30,000 rpm

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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8 Products

Grinding Bit Sets for Metals

Each set contains a selection of grinding bits.

Bits are aluminum oxide, which is the most common abrasive used for grinding metal. They are also known as mounted points and die grinder bits.

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.

For technical drawings and 3-D models, click on a part number.

		Abrasive
No. of Pieces	Includes	Material	Bond Material	Shank Lg.	Grit (Surface Texture)		Each
For Steel, Iron
1/8" Shank Dia.
12	Foam Block Stand;Two each: B42, B44, B46, B52, B53, B103	Aluminum Oxide	Vitrified Clay	1 1/2"	60 (Rough) Orange	0000000	000000
50	Foam Block Stand;Two each: B97, Six Each: B44, W144, W145, W154, W163, W170, W176, W185	Aluminum Oxide	Vitrified Clay	1 1/2"	60 (Rough) Red	0000000	00000
144	Foam Block Stand;Nine each: B44, B52, B97, B121, W142, W144, W145, W153, W154, W162, W163, W170, W175, W176, W185, W200	Aluminum Oxide	Vitrified Clay	1 1/2"	60 (Rough) Red	0000000	000000
1/8" and 1/4" Shank Dia.
100	Five each: A1, A3, A4, A11, A12, A24, A38, W164, W185, W220, with 1/4" Shank;Five each: B42, B44, B52, B53, B111, B131, W144, W154, W163, W185, with 1/8" shank;Foam Block Stand	Aluminum Oxide	Vitrified Clay	1 1/2"	60 (Rough) Orange	0000000	000000
1/4" Shank Dia.
50	Five each: A2, A5, A12, A37, A38, W185, W186, W187, W205, W219;Foam Block Stand	Aluminum Oxide	Vitrified Clay	1 1/2"	60 (Rough) Red	0000000	00000

Rubber-Cushioned Abrasive Grinding Bit Sets for Metals

The bits in this set have rubber blended into the abrasive, which cushions during grinding to produce a smooth to extra-smooth surface texture.

Set includes aluminum oxide bits for grinding hard metals and silicon carbide bits for grinding soft metals.

For technical drawings and 3-D models, click on a part number.

			Abrasive
No. of Pieces	Includes	Max. Speed, rpm	Material	Bond Material	Grit (Surface Texture)		Each
For Steel, Aluminum, Brass, Bronze
126	30 Silicon Carbide and 10 Aluminum Oxide 15/16" Lg. x 1/4" Dia. Bits, 30 Silicon Carbide and 10 Aluminum Oxide 7/8" Dia. Tapered-Edge Discs, 30 Silicon Carbide and 10 Aluminum Oxide 7/8" Dia. x 1/8" Thick Straight Discs, Two Spiral Mandrels with Hex Nut, Four 1/8" Dia. Mandrels, Paper and Plastic Case	21,000	Aluminum Oxide/Silicon Carbide Blend	Rubber	120 (Smooth) to 240 (Extra Smooth)	0000000	000000

Miniature Bit and Disc Sets

Set contains an assortment of tools for grinding, sanding, and cutting on small surface areas.

It includes aluminum oxide bits for grinding hard metals and silicon carbide bits for grinding soft metals.

For Steel, Aluminum, Brass, Bronze
No. of Pieces	Includes	Max. Speed, rpm	Abrasive Material	Color		Each
1/8" Shank Dia.
134	64 Cutoff Discs, 16 Aluminum Oxide Sanding Bands, One Rubber Drum for Sanding Bands, 36 Sanding Discs;One Mandrel for Cutoff and Sanding Discs;Six Aluminum Oxide Grinding Bits, Four Silicon Carbide Grinding Bits, Six Aluminum Oxide Grinding Discs;Plastic Case	30,000	Aluminum Oxide/Silicon Carbide Blend	Brown, Gray	0000000	000000

Hex-Shank Grinding Bit Sets for Metals

Hex Shank

Set contains a selection of our most popular hex-shank grinding bits. Use them 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.

		Abrasive
No. of Pieces	Includes	Material	Bond Material	Shank Lg.	Grit (Surface Texture)		Each
For Steel, Iron
1/4" Shank Hex Size
12	One each: A5, A12, A15, W178, Two each: A21, A24, A38, W218;Foam Block Stand	Aluminum Oxide	Vitrified Ceramic	1 1/2"	60 (Rough) Gray	0000000	000000