Hole Saw Adapters | McMaster-Carr

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Arbor Hole Thread Size

1/2"-20

5/8"-18

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Pilot Drill Bit Length

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

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19 Products

Hole Saw Pilot for Enlarging Holes

Easily enlarge an existing hole by giving your hole saw a stable, centered base. These pilots turn the smaller hole saw you used to make the original hole into an anchor for your larger hole saw. First, attach the larger hole saw to your arbor. Then replace your arbor’s pilot drill bit with the pilot. The smaller hole saw threads onto the pilot upside down, so the teeth face away from the material being cut. When you start to cut the larger hole, the smaller hole saw will slip into the existing hole and keep your arbor and larger hole saw aligned.

These pilots fit all brands of threaded hole saws.

Thread Adapters—Thread adapter is required for use on 1 _1/8" diameter and larger hole saws to adapt _1/2"-20 threads to _5/8"-18 threads.

Pilots				Thread Adapters
Arbor Size	Thread Size		Each		Each
1/4"	1/2"-20	4158A11	000000	4158A12	00000

Hole Saw Arbors with Pilot Drill Bit


Arbor with Pilot Drill Bit	Long-Life Pilot Drill Bit

Secure your hole saw to a drill or drill press with these arbors. An included pilot drill bit centers your cut and guides the saw. These arbors fit all brands of threaded hole saws.

Retractable Locking Pins—Arbors with retractable locking pins detach quickly—just pull back the collar and unthread your hole saw.

Long-Life Pilot Drill Bits—Long-life pilot drill bits are carbide tipped, so they last up to twice as long as high-speed steel.

	Arbors												Replacement Pilot Drill Bits		Long-Life Pilot Drill Bits
				Pilot Drill Bit			Set Screw Drive
	Shank Size	For Arbor Hole Thread Size	For Hole Saw Dia.	Dia.	Lg.	Material	Size	Style	Includes	Features		Each		Each		Each
For Threaded Arbor Hole



		1/4"	1/2"-20	9/16" to 1 3/16" (14 mm to 30 mm)	1/4"	3 1/16"	High-Speed Steel	5 mm	Hex	Pilot Drill Bit	—	4066A76	00000	4066A86	00000	4066A141	00000


		1/4"	1/2"-20	9/16" to 1 3/16" (14 mm to 30 mm)	1/4"	3 5/8"	High-Speed Steel	4 mm	Hex	Pilot Drill Bit	—	4066A203	00000	4066A201	0000	———	0
		11/32"	1/2"-20	9/16" to 1 3/16" (14 mm to 30 mm)	1/4"	3 1/8"	High-Speed Steel	—	Slotted	Pilot Drill Bit	—	4066A205	00000	4066A202	0000	———	0
		11/32"	1/2"-20	9/16" to 1 3/16" (14 mm to 30 mm)	1/4"	3 5/8"	High-Speed Steel	—	Slotted	Pilot Drill Bit	—	4066A204	00000	4066A201	0000	———	0
		11/32"	5/8"-18	1 1/4" to 8 9/32" (32 mm to 210 mm)	1/4"	3 5/8"	High-Speed Steel	—	Slotted	Pilot Drill Bit	—	4066A206	00000	4066A201	0000	———	0
		3/8"	1/2"-20	9/16" to 1 3/16" (14 mm to 30 mm)	1/4"	3 1/16"	High-Speed Steel	5 mm	Hex	Pilot Drill Bit	—	4066A78	0000	4066A86	0000	4066A141	0000
		3/8"	5/8"-18	1 1/4" to 6 5/8" (32 mm to 168 mm)	1/4"	3 1/16"	High-Speed Steel	5 mm	Hex	Pilot Drill Bit	Retractable Locking Pins	4066A79	00000	4066A86	0000	4066A141	0000
		7/16"	1/2"-20	9/16" to 1 3/16" (14 mm to 30 mm)	1/4"	4 5/16"	High-Speed Steel	1/8"	Hex	Pilot Drill Bit	—	4066A62	00000	4066A86	0000	4066A141	0000
		7/16"	5/8"-18	1 1/4" to 6 5/8" (32 mm to 168 mm)	1/4"	3 1/16"	High-Speed Steel	5 mm	Hex	Pilot Drill Bit	Retractable Locking Pins	4066A63	00000	4066A86	0000	4066A141	0000

Accessories for Hole Saw Arbors

Arbor Thread Adapter—Arbor thread adapters let you use arbors with _1/2"-20 threads with hole saws that have _5/8"-18 threads.

		Each
Arbor Thread Adapter	4066A77	00000
Arbor Extension for 7/16" Shank Size	4066A64	00000

Hole Saw Kits

Cut perfectly round holes in a variety of diameters. With variable-set teeth, the saws make quick cuts through wood, sheet metal, and other materials with minimal vibration. Also known as bimetal hole saws, they have high-speed steel teeth and a steel body. Often used to remove more material than drill bits, these saws are helpful for jobs such as creating cutouts for doorknobs or cables. Attach them to a drill or drill press with the included arbors.

Quick-change hole saw arbors use a simple push-and-turn motion to attach and detach the saw. This makes it easy to quickly change sizes, instead of having to screw a hole saw on and off.

Quick-release pilot drill bits are easy to remove—just pull them out of your saw without any special tools.

				Material
	No. of Saws	Dia.	Cutting Dp.	Body	Tooth	Includes		Each
For Aluminum, Brass, Bronze, Stainless Steel, Steel, and Wood



		5	7/8", 1", 1 1/8", 1 1/4", 1 1/2"	1 15/16"	Steel	High-Speed Steel	1/4" Hex-Shank Arbor with 1/4" Dia. High-Speed Steel Pilot Drill 7/16" Hex-Shank Arbor with 1/4" Dia. High-Speed Steel Pilot Drill 1/2"-20 to 5/8"-18 Arbor Thread Adapter Plastic case	4044A17	000000


		9	3/4", 7/8", 1 1/8", 1 3/8", 1 1/2", 1 3/4", 2", 2 1/4", 2 1/2"	1 15/16"	Steel	High-Speed Steel	1/4" Hex-Shank Arbor with 1/4" Dia. High-Speed Steel Pilot Drill 7/16" Hex-Shank Arbor with 1/4" Dia. High-Speed Steel Pilot Drill 1/2"-20 to 5/8"-18 Arbor Thread Adapter One Extra 1/4" Dia. High-Speed Steel Pilot Drill Plastic case	4742A11	000000