9" Grinding Wheels | McMaster-Carr

Filter by

Grinding Wheel Designation

Diameter

Arbor Hole

For Use On

Arbor Hole Size

Abrasive Material

Thickness

For Use With

Grit Rating

Color

Arbor Hole Thread Size

Grit

Grinding Wheel Shape

Abrasive Bond Material

Form

Norton Abrasive Bond

Mount Type

Export Control Classification Number (ECCN)

DFARS Specialty Metals

REACH

RoHS

Surface Texture

Maximum Rotation Speed

Arbor Hole Shape

Arbor Hole Diameter

Disc Shape

Forward

How can we improve?

63 Products

About Sanding Abrasives

Plated Disc

The porous bond leaves more space between abrasive grains so heavy amounts of chips and coolant easily flow through.

32A purple wheels are for medium to heavy material removal. They are aluminum oxide, which is the most common abrasive used in grinding metal.

Caution: 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.

						Wheel
Dia.	Thick.	Arbor Hole Size	Max. Speed, rpm	Abrasive Material	Abrasive Bond Material	Type	Shape	Grit (Surface Texture)	Norton Abrasive Grade		Each
32A Purple—VBEP Bond
For Steel, Stainless Steel, Iron, Nickel
9"	2"	4 15/16"	2,550	Aluminum Oxide	Vitrified Clay	Type 35	Plated Disc	70 (Smooth)	J	00000000	0000000

General Purpose Grinding Wheels for Angle Grinders—Use on Metals

A good value for everyday use, these wheels offer an economical balance between heavy material removal and long life. They are also known as Type 27 wheels, raised-hub wheels, and grinding discs.

Wheels are aluminum oxide, which is the most common abrasive used in grinding metal. Use for grinding surfaces and removing weld seams. The 1/8" and 3/16" thick wheels can also be used for notching and cutting.

Caution: 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.

							Wheel					Each		Package
Dia.	Thick.	Arbor Hole Size	Arbor Hole Thread Size	Max. Speed, rpm	Abrasive Material	Abrasive Bond Material	Type	Shape	Backup Pads Required	Color	Grit (Surface Texture)		Each	Pkg. Qty.		Pkg.
For Steel
Unthreaded Arbor Hole
9"	1/8"	7/8"	__	6,600	Aluminum Oxide	Synthetic Resin	Type 27	Raised Hub	No	Black	24 (Rough)	0000000	000000	20	00000000	0000000
9"	1/4"	7/8"	__	6,600	Aluminum Oxide	Synthetic Resin	Type 27	Raised Hub	No	Black	24 (Rough)	0000000	00000	20	00000000	000000
Threaded Arbor Hole
9"	1/8"	__	5/8"-11	6,600	Aluminum Oxide	Synthetic Resin	Type 27	Raised Hub	No	Black	24 (Rough)	0000000	00000	10	00000000	000000
9"	1/4"	__	5/8"-11	6,600	Aluminum Oxide	Synthetic Resin	Type 27	Raised Hub	No	Black	24 (Rough)	0000000	00000	10	00000000	000000

Long-Life Grinding Wheels for Angle Grinders—Use on Metals

Wheels are a blend of aluminum oxide and zirconia alumina, which removes more material and lasts three times as long as our General Purpose Grinding Wheels. They are also known as Type 27 wheels, raised-hub wheels, and grinding discs.

Wheels are designed for grinding metal surfaces and removing weld seams. The 1/8" thick wheels can also be used for notching and cutting.

Caution: 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.

							Wheel					Each		Package
Dia.	Thick.	Arbor Hole Size	Arbor Hole Thread Size	Max. Speed, rpm	Abrasive Material	Abrasive Bond Material	Type	Shape	Backup Pads Required	Color	Grit (Surface Texture)		Each	Pkg. Qty.		Pkg.
For Steel, Stainless Steel, Iron
Unthreaded Arbor Hole
9"	1/8"	7/8"	__	6,600	Aluminum Oxide/ Zirconia Alumina Blend	Synthetic Resin	Type 27	Raised Hub	No	Black	30 (Rough)	00000000	000000	20	000000000	0000000
9"	1/4"	7/8"	__	6,600	Aluminum Oxide/ Zirconia Alumina Blend	Synthetic Resin	Type 27	Raised Hub	No	Black	24 (Rough)	00000000	00000	20	000000000	000000
Threaded Arbor Hole
9"	1/8"	__	5/8"-11	6,600	Aluminum Oxide/ Zirconia Alumina Blend	Synthetic Resin	Type 27	Raised Hub	No	Black	30 (Rough)	00000000	00000	10	000000000	000000
9"	1/4"	__	5/8"-11	6,600	Aluminum Oxide/ Zirconia Alumina Blend	Synthetic Resin	Type 27	Raised Hub	No	Black	24 (Rough)	00000000	00000	10	000000000	000000

High-Performance Grinding Wheels for Angle Grinders—Use on Metals

A blend of ceramic alumina and zirconia alumina removes material at a 50% faster rate than our Long-Life Grinding Wheels. Wheels are also known as Type 27 wheels, raised-hub wheels, and grinding discs.

Wheels are designed for grinding metal surfaces and removing weld seams. The 1/8" and 3/16" thick wheels can also be used for notching and cutting.

Caution: 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.

							Wheel					Each		Package
Dia.	Thick.	Arbor Hole Size	Arbor Hole Thread Size	Max. Speed, rpm	Abrasive Material	Abrasive Bond Material	Type	Shape	Backup Pads Required	Color	Grit (Surface Texture)		Each	Pkg. Qty.		Pkg.
For Steel, Stainless Steel
Unthreaded Arbor Hole
9"	1/4"	7/8"	__	6,600	Ceramic Alumina/ Zirconia Alumina Blend	Synthetic Resin	Type 27	Raised Hub	No	Black	20 (Rough)	00000000	000000	20	000000000	0000000
Threaded Arbor Hole
9"	1/8"	__	5/8"-11	6,600	Ceramic Alumina/ Zirconia Alumina Blend	Synthetic Resin	Type 27	Raised Hub	No	Black	24 (Rough)	00000000	00000	10	000000000	000000
9"	1/4"	__	5/8"-11	6,600	Ceramic Alumina/ Zirconia Alumina Blend	Synthetic Resin	Type 27	Raised Hub	No	Black	20 (Rough)	00000000	00000	10	000000000	000000

Contaminant-Free Grinding Wheels for Angle Grinders—Use on Metals

The absence of iron, sulfur, and chlorine in these wheels means they won’t corrode or discolor stainless steel. They are also known as INOX wheels, Type 27 wheels, raised-hub wheels, and grinding discs.

Wheels are aluminum oxide, which is the most common abrasive used in grinding metal. They are designed for grinding surfaces and removing weld seams.

Caution: Use only accessories that have a greater rpm rating than the maximum speed of the grinder you choose.

						Wheel					Each		Package
Dia.	Thick.	Arbor Hole Thread Size	Max. Speed, rpm	Abrasive Material	Abrasive Bond Material	Type	Shape	Backup Pads Required	Color	Grit (Surface Texture)		Each	Pkg. Qty.		Pkg.
For Stainless Steel
Threaded Arbor Hole
9"	1/4"	5/8"-11	6,600	Aluminum Oxide	Synthetic Resin	Type 27	Raised Hub	No	Black	24 (Rough)	0000000	000000	10	00000000	0000000

General Purpose Curved-Surface Flexible Grinding
Wheels for Angle Grinders—Use on Metals

Type 27

The flexible backing on these wheels conforms to curved and rough surfaces. Wheels are aluminum oxide, which is the most common abrasive used in grinding metal.

Type 27 wheels are also known as raised-hub wheels.

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

									Each		Package
Dia.	Thick.	Arbor Hole Thread Size	Max. Speed, rpm	Abrasive Material	Abrasive Bond Material	Backup Pads Required	Color	Choose a Grit (Surface Texture)		Each	Pkg. Qty.		Pkg.
Type 27, Raised Hub
For Steel, Stainless Steel—Threaded Arbor Hole
9"	1/8"	5/8"-11	6,500	Aluminum Oxide	Synthetic Resin	No	Black	36 (Rough), 46 (Rough), 60 (Rough)	000000	000000	10	0000000	0000000

Easy-Use Grinding Wheels for Angle Grinders—Use on Metals

The saucer shape lets you hold these wheels at shallower angles than Type 27 wheels, so they’re more comfortable to handle. They are also known as Type 28 wheels and raised-hub wheels.

Wheels are aluminum oxide, which is the most common abrasive used in grinding metal.

Caution: 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.

							Wheel					Each		Package
Dia.	Thick.	Arbor Hole Size	Arbor Hole Thread Size	Max. Speed, rpm	Abrasive Material	Abrasive Bond Material	Type	Shape	Backup Pads Required	Color	Grit (Surface Texture)		Each	Pkg. Qty.		Pkg.
For Steel, Stainless Steel, Aluminum, Brass
Unthreaded Arbor Hole
9"	1/4"	7/8"	__	6,600	Aluminum Oxide	Synthetic Resin	Type 28	Raised Hub	No	Black	24 (Rough)	000000	000000	20	00000000	0000000
Threaded Arbor Hole
9"	1/4"	__	5/8"-11	6,600	Aluminum Oxide	Synthetic Resin	Type 28	Raised Hub	No	Black	24 (Rough)	0000000	00000	10	00000000	000000

Arbor-Mount Sanding Discs

Unthreaded Arbor Hole

Flat

Fit these discs over your tool’s arbor. They require a backup pad (sold separately).

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

Unthreaded Arbor Hole
Dia.	Arbor Hole Dia.	Abrasive Material	Abrasive Backing Material	For Use On	For Use With	Choose a Grit	Pkg. Qty.		Pkg.
For Rough Finish
9"	7/8"	Aluminum Oxide	Fiber	Steel, Wood	Angle Grinders	16, 24, 36, 50, 60, 80	5	00000000	000000
For Smooth Finish
9"	7/8"	Aluminum Oxide	Fiber	Steel, Wood	Angle Grinders	100, 120	5	00000000	00000

Long-Life Arbor-Mount Sanding Discs

Flat with Unthreaded Arbor Hole

Flat

Change your discs less often—the zirconia alumina grit on these discs continually fractures to produce new, sharp cutting edges. Great for aggressively removing material from metal and wood. The stiff fiber backing provides support for heavy material removal. Fit these discs over your tool’s arbor; they require a backup pad (sold separately).

Flat discs can be used for stock removal, blending, and finishing. Use on flat surfaces.

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

Flat Discs with Unthreaded Arbor Hole
Dia.	Arbor Hole Dia.	Abrasive Material	Abrasive Backing Material	For Use On	For Use With	Choose a Grit	Pkg. Qty.		Pkg.
For Rough Finish
9"	7/8"	Zirconia Alumina	Fiber	Steel, Wood	Angle Grinders	24, 36, 50, 60	5	0000000	000000

Long-Life Arbor-Mount Sanding Discs for Stainless Steel and Hard Metals

Unthreaded Arbor Hole

The premium abrasive stays sharp longer. Fit these discs over your tool’s arbor. They require a backup pad (sold separately).

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

Unthreaded Arbor Hole
Dia.	Arbor Hole Dia.	Abrasive Material	Abrasive Backing Material	For Use On	For Use With	Choose a Grit	Pkg. Qty.		Pkg.
For Rough Finish
9"	7/8"	Ceramic Alumina	Fiber	Stainless Steel, Titanium, Steel, Iron, Nickel	Angle Grinders	24, 36, 50	5	00000000	000000

Adhesive-Back Sanding Discs

Press onto a compatible sanding tool or backup pad (sold separately); peel off to remove. Also known as PSA discs. To maintain strong adhesion, clean the pad surface with mild alcohol before applying. Do not use aggressive cleaning solvents such as MEK or acetone, which can damage the adhesive.

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

Cloth Abrasive Backing
Dia.	Abrasive Material	Sanding Properties	For Use On	For Use With	Choose a Grit	Pkg. Qty.		Pkg.
For Rough Finish
9"	Aluminum Oxide	Tear Resistant	Steel, Wood	Stationary Disc Sanders	36, 40, 50, 60, 80	5	00000000	000000
For Smooth Finish
9"	Aluminum Oxide	Tear Resistant	Steel, Wood	Stationary Disc Sanders	100, 120, 180, 220	5	00000000	00000
For Extra Smooth Finish
9"	Aluminum Oxide	Tear Resistant	Steel, Wood	Stationary Disc Sanders	240, 320, 400	5	00000000	00000

Long-Life Adhesive-Back Sanding Discs

Coated with zirconia alumina to stay sharper longer. The abrasive grit continually fractures to produce new, sharp cutting edges. This abrasive is great for aggressively removing material from steel and wood, and it lasts longer than aluminum oxide. Press onto a compatible sanding tool or backup pad (sold separately); peel off to remove. Also known as PSA discs. To maintain strong adhesion, clean the pad surface with mild alcohol before applying. Do not use aggressive cleaning solvents such as MEK or acetone, which can damage the adhesive.

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

For Rough Finish
Dia.	Abrasive Material	Abrasive Backing Material	Sanding Properties	For Use On	For Use With	Choose a Grit		Each
9"	Zirconia Alumina	Cloth	Tear Resistant	Steel, Wood	Stationary Disc Sanders	36, 40, 50, 60, 80	000000000	00000
For Smooth Finish
9"	Zirconia Alumina	Cloth	Tear Resistant	Steel, Wood	Stationary Disc Sanders	120	000000000	0000

Clog-Resistant Adhesive-Back Sanding Discs

A coating prevents dust and debris from building up on the abrasive surface. Press these discs onto a compatible sanding tool or backup pad (sold separately); peel off to remove. Also known as PSA discs. To maintain strong adhesion, clean the pad surface with mild alcohol before applying. Do not use aggressive cleaning solvents such as MEK or acetone, which can damage the adhesive.

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

Cloth Abrasive Backing
Dia.	Abrasive Material	Sanding Properties	For Use On	For Use With	Choose a Grit	Pkg. Qty.		Pkg.
For Rough Finish
9"	Aluminum Oxide	Clog Resistant, Tear Resistant	Steel, Wood	Stationary Disc Sanders	40, 60, 80	5	00000000	000000
For Smooth Finish
9"	Aluminum Oxide	Clog Resistant, Tear Resistant	Steel, Wood	Stationary Disc Sanders	100, 120, 180	5	00000000	00000

Adhesive-Back Sanding Discs for Aluminum, Soft Metals, and Nonmetals

Discs with paper abrasive backing come on a roll.

Water-resistant discs resist deterioration when used wet.

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

Cloth Abrasive Backing
Dia.	Abrasive Material	Sanding Properties	For Use On	For Use With	Choose a Grit	Pkg. Qty.		Pkg.
For Rough Finish
9"	Silicon Carbide	Tear Resistant	Aluminum, Brass, Bronze, Copper, Plastic, Rubber	Stationary Disc Sanders	60, 80	1	00000000	00000
For Smooth Finish
9"	Silicon Carbide	Tear Resistant	Aluminum, Brass, Bronze, Copper, Plastic, Rubber	Stationary Disc Sanders	100, 120, 180	1	00000000	0000
Paper Abrasive Backing
For Rough Finish
9"	Silicon Carbide	Water Resistant	Aluminum, Brass, Bronze, Copper, Plastic, Rubber	Stationary Disc Sanders	60	5	00000000	00000
9"	Silicon Carbide	Water Resistant	Aluminum, Brass, Bronze, Copper, Plastic, Rubber	Stationary Disc Sanders	80	5	00000000	00000
For Smooth Finish
9"	Silicon Carbide	Water Resistant	Aluminum, Brass, Bronze, Copper, Plastic, Rubber	Stationary Disc Sanders	180	5	00000000	00000
For Extra Smooth Finish
9"	Silicon Carbide	Water Resistant	Aluminum, Brass, Bronze, Copper, Plastic, Rubber	Stationary Disc Sanders	240	5	00000000	00000
For Polished Finish
9"	Silicon Carbide	Water Resistant	Aluminum, Brass, Bronze, Copper, Plastic, Rubber	Stationary Disc Sanders	600	5	00000000	00000

Angle Grinder Cutoff Wheels for Metal

Side View

Use these wheels to cut through metal such as iron, stainless steel, and steel. They are reinforced with two layers of fiberglass mesh. Choose coarser grit for fast cuts; choose finer grit for smooth cuts.

Warning: Use wheels that have a greater rpm rating than the no-load rpm of your tool.

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

			Wheel		Material
Thick.	Arbor Hole Size	Max. Speed, rpm	Type	Shape	Abrasive	Reinforcement	For Use On	Grit		Each
9" Dia.
0.065"	7/8"	6,600	Type 1	Straight	Aluminum Oxide	Fiberglass Mesh	Aluminum, Iron, Stainless Steel, Steel	46	00000000	00000
3/32"	7/8"	6,600	Type 1	Straight	Aluminum Oxide	Fiberglass Mesh	Aluminum, Iron, Stainless Steel, Steel	24	0000000	0000

Flush-Cut Angle Grinder Cutoff Wheels for Metal

Side View

Also known as Type 27, raised-hub, and depressed-center cutoff wheels, these wheels outperform Type 1 wheels when making flush cuts in metal. Wheels are reinforced with two layers of fiberglass mesh. Choose coarser grit for fast cuts; choose finer grit for smooth cuts.

Warning: Use wheels that have a greater rpm rating than the no-load rpm of your tool.

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

				Wheel		Material
Thick.	Arbor Hole Size	Arbor Hole Thread Size	Max. Speed, rpm	Type	Shape	Abrasive	Reinforcement	For Use On	Grit		Each
9" Dia.
5/64"	7/8"	__	6,600	Type 27	Raised Hub	Aluminum Oxide	Fiberglass Mesh	Stainless Steel, Steel	46	00000000	000000
3/32"	__	5/8"-11	6,600	Type 27	Raised Hub	Aluminum Oxide	Fiberglass Mesh	Aluminum, Iron, Stainless Steel, Steel	24	0000000	00000
3/32"	7/8"	__	6,600	Type 27	Raised Hub	Aluminum Oxide	Fiberglass Mesh	Aluminum, Iron, Stainless Steel, Steel	24	0000000	00000

Flush-Cut Angle Grinder Cutoff Wheels for Stainless Steel

Side View

Also known as Type 27, raised-hub, and depressed-center cutoff wheels, these wheels outperform Type 1 wheels when making flush cuts. They make fast, burr-free cuts in stainless steel. Wheels are reinforced with two layers of fiberglass mesh. Choose coarser grit for fast cuts; choose finer grit for smooth cuts.

Warning: Use wheels that have a greater rpm rating than the no-load rpm of your tool.

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

			Wheel		Material
Thick.	Arbor Hole Thread Size	Max. Speed, rpm	Type	Shape	Abrasive	Reinforcement	Grit		Each
9" Dia.
3/32"	5/8"-11	6,600	Type 27	Raised Hub	Zirconia Alumina	Fiberglass Mesh	36	00000000	000000

Contaminant-Free Angle Grinder Cutoff Wheels for Stainless Steel

Side View

Prevent corrosion and discoloration on stainless steel—these wheels contain less than 0.1% iron, chloride, and sulfur contaminants. They have an aluminum oxide grit and are reinforced with two layers of fiberglass mesh. Choose coarser grit for fast cuts; choose finer grit for smooth cuts.

Warning: Use wheels that have a greater rpm rating than the no-load rpm of your tool.

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

			Wheel		Material
Thick.	Arbor Hole Size	Max. Speed, rpm	Type	Shape	Abrasive	Reinforcement	Grit		Each
9" Dia.
0.078"	7/8"	6,600	Type 1	Straight	Aluminum Oxide	Fiberglass Mesh	46	0000000	000000

Flush-Cut Contaminant-Free Angle Grinder Cutoff Wheels for Stainless Steel

Side View

Also known as Type 27, raised-hub, and depressed-center cutoff wheels, these wheels outperform Type 1 wheels when making flush cuts. They contain less than 0.1% iron, chloride, and sulfur contaminants, so they won't corrode or discolor stainless steel. Wheels are aluminum oxide abrasive that is reinforced with two layers of fiberglass mesh.

Warning: Use wheels that have a greater rpm rating than the no-load rpm of your tool.

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

			Wheel		Material
Thick.	Arbor Hole Size	Max. Speed, rpm	Type	Shape	Abrasive	Reinforcement	Grit		Each
9" Dia.
0.078"	7/8"	6,600	Type 27	Raised Hub	Aluminum Oxide	Fiberglass Mesh	46	00000000	000000

Flush-Cut Angle Grinder Cutoff Wheels for Aluminum, Brass, and Copper

Side View

Also known as Type 27, raised-hub, and depressed-center cutoff wheels, these wheels outperform Type 1 wheels when making flush cuts. They make quick cuts in soft metal such as aluminum, brass and copper without clogging. Wheels are reinforced with two layers of fiberglass mesh.

Warning: Use wheels that have a greater rpm rating than the no-load rpm of your tool.

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

			Wheel		Material
Thick.	Arbor Hole Thread Size	Max. Speed, rpm	Type	Shape	Abrasive	Reinforcement	Grit		Each
9" Dia.
1/16"	5/8"-11	6,600	Type 27	Raised Hub	Aluminum Oxide	Fiberglass Mesh	24	0000000	000000

Portable Cutoff Saw Wheels for Masonry and Concrete

Side View

Make cuts in hard, brittle materials such as firebrick, stone, and concrete. These wheels are silicon carbide that is reinforced with a layer of fiberglass mesh.

Warning: Use wheels that have a greater rpm rating than the no-load rpm of your tool.

			Wheel		Material
Thick.	Arbor Hole Size	Max. Speed, rpm	Type	Shape	Abrasive		Each
9" Dia.
7/64"	7/8"	6,600	Type 1	Straight	Diamond	0000000	000000

Portable Cutoff Saw Wheels for Metal

Side View

Use these wheels to cut through metal such as aluminum, iron, stainless steel, and steel. They are reinforced with a layer of fiberglass mesh.

Warning: Use wheels that have a greater rpm rating than the no-load rpm of your tool.

			Wheel		Material
Thick.	Arbor Hole Size	Max. Speed, rpm	Type	Shape	Abrasive	Reinforcement	For Use On	Grit		Each
9" Dia.
5/64"	7/8"	6,600	Type 1	Straight	Ceramic	Fiberglass Mesh	Aluminum, Iron, Stainless Steel, Steel	60	0000000	000000

Cutoff Wheels for Metallurgical Testing

Side View

Create the nearly polished finish required for testing metal with these non-reinforced aluminum oxide wheels. They are not for use on hand-held saws.

Warning: Use wheels that have a greater rpm rating than the no-load rpm of your tool.

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

				Wheel
Thick.	For Hardness	Arbor Hole Size	Max. Speed, rpm	Type	Shape	Abrasive Material	For Use On	Grit		Each
9" Dia.
0.063"	Rockwell C30-C40	1 1/4"	4,025	Type 1	Straight	Aluminum Oxide	Iron, Stainless Steel, Steel	90	0000000	000000
0.063"	Rockwell C40-C55	1 1/4"	4,025	Type 1	Straight	Aluminum Oxide	Iron, Stainless Steel, Steel	100	0000000	00000
0.063"	Rockwell C55-C68	1 1/4"	4,025	Type 1	Straight	Aluminum Oxide	Stainless Steel, Steel	100	0000000	00000