Type 27 Grinding Wheels | McMaster-Carr

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	Wheel Type Wheel Type

	Type 27

	Industry Designation Industry Designation

Type 27

	Diameter Diameter

4 1/2"

	Thickness Thickness

	For Use On For Use On

	Arbor Hole Arbor Hole

Unthreaded

Threaded

	Arbor Hole Size Arbor Hole Size

3/8"

5/8"

7/8"

	For Use With For Use With

Angle Grinders

	Grit Grit

	Abrasive Material Abrasive Material

Aluminum Oxide

Aluminum Oxide/Zirconia
Alumina Blend

Ceramic Alumina

Ceramic Alumina/Zirconia
Alumina Blend

Cotton Laminate/Aluminum
Oxide Blend

Nylon Mesh/Aluminum Oxide
Blend

Nylon Mesh/Silicon Carbide
Blend

Silicon Carbide

Zirconia Alumina

	Maximum Speed Maximum Speed

Less than 10,000 rpm

10,000 to 19,999 rpm

	Arbor Hole Thread Size Arbor Hole Thread Size

5/8"-11

	Wheel Shape Wheel Shape

Raised Hub

	Color Color

	Brown		Black
	White		Orange
	Light Gray		Dark Gray

	Surface Texture Surface Texture

Rough

Smooth

Extra Smooth

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

DFARS Specialty Metals
COTS-Exempt

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

RoHS Compliant

	Backup Pads Required Backup Pads Required

	Abrasive Bond Material Abrasive Bond Material

Synthetic Resin

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

REACH Compliant

	Arbor Hole Shape Arbor Hole Shape

	Round

	Form Form


Flap Disc	Disc

	Disc Shape Disc Shape

	Flat

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304 Products

Grinding Wheels for Angle Grinders

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.

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.

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.

Grinding Wheels for Angle
Grinders—Use on Soft Metals

Bonded without any wax or rubber filler, these wheels resist material buildup. They are also known as Type 27 wheels, raised-hub wheels, and grinding discs.

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.

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

The flexible backing on these wheels conforms to curved and rough surfaces.

Grinding Wheels with Nylon Mesh
for Angle Grinders—Use on Metals

Multiple layers of nylon mesh embedded with abrasive provide a cushioned grind. Also known as unitized discs or wheels.

Grinding Wheels with Cotton Laminate
for Angle Grinders—Use on Metals

A blend of cotton laminate and aluminum oxide creates a smoother surface than other grinding wheels with similar grits. Wheels are also known as Type 27 wheels and raised-hub wheels.

Grinding Wheels for Angle Grinders—Use on Nonmetals

Silicon carbide cuts through concrete and stone without generating much heat. Wheels are also known as Type 27 wheels, raised-hub wheels, and grinding discs.

Sanding Discs

Cool-Sanding Flap Sanding Discs

The flaps alternate between an abrasive to remove material and a lubricant that minimizes heat to reduce discoloration of the work surface.

Fast-Cutting Flap Sanding Discs
for Stainless Steel and Hard Metals

These discs have a harder abrasive than standard flap sanding discs.

Cool-Sanding Flap Sanding Discs
for Stainless Steel and Hard Metals

The flaps have an abrasive to remove material and a lubricant that minimizes heat to reduce discoloration of the work surface.

Cool-Sanding Flap Sanding Discs for
Aluminum, Soft Metals, and Nonmetals

The flaps have an abrasive to remove material and a lubricant that minimizes heat to reduce discoloration of the work surface.

Nylon Mesh Cushioned Arbor-Mount Sanding Discs

The abrasive-embedded mesh construction gives you more control over sanding pressure, creating finer and more consistent finishes.

Nylon Mesh Cushioned Arbor-Mount Sanding
Discs for Stainless Steel and Hard Metals

Used for stripping, these discs eliminate discoloration from heat buildup.

Cutoff Wheels for Angle Grinders

Flush-Cut Angle Grinder Cutoff Wheels for Metal

Also known as Type 27, raised-hub, and depressed-center cutoff wheels, these wheels outperform Type 1 wheels when making flush cuts in aluminum, iron, stainless steel, and steel.

Angle Grinder Cutoff Wheels
for Cutting and Deburring Metal

Switch between cutting and deburring aluminum, iron, stainless steel, and steel without the need to change your wheel.

Angle Grinder Cutoff Wheels
for Cutting and Notching Metal

Made of premium grade abrasives, these wheels are strong and thick for making notches in aluminum, iron, stainless steel, and steel.

Flush-Cut Angle Grinder Cutoff
Wheels for Stainless Steel

Also known as Type 27, raised-hub, and depressed-center cutoff wheels, these wheels outperform Type 1 wheels when making flush cuts.

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

Also known as Type 27, raised-hub, and depressed-center cutoff wheels, these wheels outperform Type 1 wheels when making flush cuts.

Angle Grinder Cutoff Wheels for
Cutting and Notching Stainless Steel

Made of premium grade of abrasives, these wheels are strong and thick for making notches in stainless steel.

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

Also known as Type 27, raised-hub, and depressed-center cutoff wheels, these wheels outperform Type 1 wheels when making flush cuts.

Grinding Wheels for Angle Grinders

General Purpose Grinding Wheelsfor Angle Grinders—Use on Metals

Long-Life Grinding Wheels forAngle Grinders—Use on Metals

High-Performance Grinding Wheelsfor Angle Grinders—Use on Metals

Grinding Wheels for AngleGrinders—Use on Soft Metals

Contaminant-Free Grinding Wheelsfor Angle Grinders—Use on Metals

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

Grinding Wheels with Nylon Meshfor Angle Grinders—Use on Metals

Grinding Wheels with Cotton Laminatefor Angle Grinders—Use on Metals

Grinding Wheels for Angle Grinders—Use on Nonmetals

Sanding Discs

Cool-Sanding Flap Sanding Discs

Fast-Cutting Flap Sanding Discsfor Stainless Steel and Hard Metals

Cool-Sanding Flap Sanding Discsfor Stainless Steel and Hard Metals

Cool-Sanding Flap Sanding Discs forAluminum, Soft Metals, and Nonmetals

Nylon Mesh Cushioned Arbor-Mount Sanding Discs

Nylon Mesh Cushioned Arbor-Mount SandingDiscs for Stainless Steel and Hard Metals

Cutoff Wheels for Angle Grinders

Flush-Cut Angle Grinder Cutoff Wheels for Metal

Angle Grinder Cutoff Wheelsfor Cutting and Deburring Metal

Angle Grinder Cutoff Wheelsfor Cutting and Notching Metal

Flush-Cut Angle Grinder CutoffWheels for Stainless Steel

Flush-Cut Contaminant-Free AngleGrinder Cutoff Wheels for Stainless Steel

Angle Grinder Cutoff Wheels forCutting and Notching Stainless Steel

Flush-Cut Angle Grinder Cutoff Wheelsfor Aluminum, Brass, and Copper

General Purpose Grinding Wheels
for Angle Grinders—Use on Metals

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

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

Grinding Wheels for Angle
Grinders—Use on Soft Metals

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

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

Grinding Wheels with Nylon Mesh
for Angle Grinders—Use on Metals

Grinding Wheels with Cotton Laminate
for Angle Grinders—Use on Metals

Fast-Cutting Flap Sanding Discs
for Stainless Steel and Hard Metals

Cool-Sanding Flap Sanding Discs
for Stainless Steel and Hard Metals

Cool-Sanding Flap Sanding Discs for
Aluminum, Soft Metals, and Nonmetals

Nylon Mesh Cushioned Arbor-Mount Sanding
Discs for Stainless Steel and Hard Metals

Angle Grinder Cutoff Wheels
for Cutting and Deburring Metal

Angle Grinder Cutoff Wheels
for Cutting and Notching Metal

Flush-Cut Angle Grinder Cutoff
Wheels for Stainless Steel

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

Angle Grinder Cutoff Wheels for
Cutting and Notching Stainless Steel

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