Hole Adapters | McMaster-Carr

	For Arbor Hole Size For Arbor Hole Size

	Reduced Arbor Hole Size Reduced Arbor Hole Size

	For Use With For Use With

Grinders for Bits and Burs

Hand-Held Power Drills

Drill Presses

Milling Machines

Milwaukee Magnetic-Base
Drills

	Arbor Hole Size Arbor Hole Size

	Arbor Hole Shape Arbor Hole Shape


Round	Diamond

	Shank Type Shank Type


Round	Morse Taper

	Material Material

Steel

Plastic

High-Speed Steel

	Thickness Thickness

	For Wheel Thickness For Wheel Thickness

1/2"

3/4"

	For Shank Diameter For Shank Diameter

	For Cutter Material For Cutter Material

Cobalt Steel

High-Speed Steel

Carbide

	For Holding For Holding

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

REACH Compliant

	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

RoHS Compliant with
Exemptions

	Overall Length Overall Length

5 1/8"

6 1/4"

10"

	Morse Taper Number Morse Taper Number

	Morse Taper Diameter Morse Taper Diameter

0.7"

0.938"

	For Manufacturer Model Number For Manufacturer Model Number

	Manufacturer Model Number Manufacturer Model Number

27 Products

Arbor Hole Reducers for Wheel Brushes

Reduce the arbor hole size of a wheel brush so that it fits the shaft of your tool.

Steel reducers come in pairs. To install, snap a reducer into the arbor hole on both sides of the wheel brush.

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

Steel

For Arbor Hole Size	Reduced Arbor Hole Size	For Max. Wheel Brush Thick.		Pair
2"	1/2"	2"	0000000	00000
2"	5/8"	2"	0000000	0000
2"	3/4"	2"	0000000	0000
2"	7/8"	2"	0000000	0000
2"	1"	2"	0000000	0000
2"	1 1/4"	2"	0000000	0000
2"	1 1/2"	2"	0000000	0000

Plastic

For Arbor Hole Size	Reduced Arbor Hole Size	Pkg. Qty.		Pkg.
1/2"	3/8"	12	0000000	00000
5/8"	1/2"	12	0000000	0000

Arbor Hole Reducers for Arbor-Mount Flap Sanding Wheels

Reduce the arbor hole size on a flap sanding wheel so that it fits the shaft on your tool. These reducers come in pairs. To install, snap a reducer into the arbor hole on both sides of the sanding wheel.

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

For Arbor Hole Size	Choose a Reduced Arbor Hole Size		Pair
1"	3/8", 1/2", 5/8", 3/4", 7/8"	00000000	00000
1 3/4"	3/4", 1", 1 1/4"	00000000	00000

Reducer Bushings for Bench and Pedestal Grinding Wheels

Bushing Shown with Wheel (Not Included)

Bushing

Insert these bushings into the arbor hole of your grinding wheel to attach wheels to smaller diameter shanks.

The smallest shank diameter size listed is the smallest allowed for that size wheel.

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

For Arbor Hole Size	For Shank Dia.	For Wheel Thick.	Material		Each
1"	1/2", 5/8", 3/4", 7/8"	1/2"	Polystyrene Plastic	00000000	00000
1"	1/2", 5/8", 3/4", 7/8"	3/4"	Polystyrene Plastic	00000000	0000
1 1/4"	3/4", 7/8", 1"	1"	Polystyrene Plastic	0000000	0000

Circular Saw Blade Arbor Reducer Bushings

Reduce the diameter of a blade's arbor hole to fit your saw's arbor. These bushings mount to the arbor hole of a circular saw blade. Do not use more than one bushing per blade.

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

Arbor Hole Size	Arbor Hole Shape	Thick.	Material		Each
5/8" to 1/2"	Round	0.056"	Steel	00000000	00000
3/4" to 5/8"	Round	0.061"	Steel	00000000	0000
20 mm to 5/8"	Round	0.041"	Steel	00000000	0000
1" to 20 mm	Round	0.07"	Steel	0000000	0000
1" to 3/4"	Round	0.089"	Steel	00000000	0000
1" to 5/8"	Round	0.08"	Steel	00000000	0000
1" to 7/8"	Round	0.07"	Steel	0000000	0000

Circular Saw Blade Diamond-to-Round Arbor Adapters

Convert a diamond arbor hole to a round arbor hole. These adapters mount to the arbor hole of a circular saw blade. Do not use more than one adapter per blade.

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

Arbor Hole Size	Thick.	Material		Each
Diamond to 5/8" Round	0.045"	Steel	0000000	00000

Arbor Adapters for Hollow-Core Cutters

Arbor Adapter with
Morse Taper
Shank

Arbor Adapter
with Straight
Shank

Use hollow-core cutters on manual drill presses and milling machines. Also known as annular cutters.

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

Morse Taper
Number	Dia.	Shank Dia.	For Cutter Shank Size	Overall Lg.	For Cutter Material	Material		Each
With Morse Taper Shank
2	0.7"	__	3/4"	6 1/4"	Cobalt Steel, High-Speed Steel	High-Speed Steel	000000000	000000
3	0.938"	__	3/4"	6 1/4"	Cobalt Steel, High-Speed Steel	High-Speed Steel	000000000	000000
With Straight Shank
__	__	3/4"	3/4"	5 1/8"	Cobalt Steel, High-Speed Steel	High-Speed Steel	000000000	000000

Arbor Adapters for Milwaukee Hollow-Core Cutters

Arbor Adapter with
Morse Taper
Shank

Arbor Adapter with Straight Shank

These arbor adapters are required when using Milwaukee hollow-core cutters, also known as annular cutters. They come with a pilot pin, which aligns the cutter and ejects the slug.

Morse Taper			For Bit Shank
Number	Dia.	Shank Dia.	Thread Size	Thread Pitch	Overall Lg.	For Cutter Material	Material	Manufacturer	Manufacturer Model Number	For Manufacturer Model Number	Includes		Each
With Morse Taper Shank
3	0.938"	__	M18	1.5mm	10"	Carbide-Tipped Steel	Steel	Milwaukee	49-57-0010	4202, 4208-1, 4209-1, 4292-1, 4297-1	Oil Hose, Oiler, Pilot Pin	00000000	0000000
With Straight Shank
__	__	3/4"	M18	1.5mm	10"	Carbide-Tipped Steel	Steel	Milwaukee	49-57-0030	4206-1, 4210-1	Oil Hose, Oiler, Pilot Pin	00000000	000000