10 Flute Reamers | McMaster-Carr

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Carbide-Tipped Tool Steel

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EAR99

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1/8 to 1

1/4 to 1 1/4

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For Deburring

37 Products

Reamer Type

Standard

Finish most holes to precise inch, metric, wire gauge, or letter sizes

26 products

For Taper-Pin Holes

Shape holes to match the profile of taper pins

4 products

Reamer Type

For Taper Pipe

Finish a hole to a tapered pipe size before tapping threads

1 product

For Morse Taper-Socket Holes

Create Morse taper-socket holes to hold cutting tools

4 products

Reamers

Finish holes to precise inch, metric, wire gauge, or letter sizes with these reamers.

Round Shank

These reamers fit in the chuck of drill presses, turret lathes, and other machine and power tools, making them the most common shank type.

Straight Flute—The most common flute style, these reamers are suitable for a wide range of applications, but not recommended for holes with a keyway or other breaks in the surface.

Spiral Flute—Since these reamers clear chips better than straight flutes, they leave holes with a smoother finish. They're better for holes with breaks in the surface, such as a keyway, because they cut continuously across the breaks instead of moving in and out.

Oversized Fractional—Oversized reamers are larger than the fraction by 0.001" in diameter to create a looser fit than standard sizes. They're typically used in holes where objects such as pins need to stay in place, but still can be easily removed.

Undersized Fractional—Undersized reamers are smaller than the fraction by 0.001" in diameter to create a tighter fit than standard sizes. They're typically used to press-fit a pin, bearing, or other object into a hole.

High-Speed Steel—Durable and wear resistant, these are good for general purpose reaming in most materials.

Right-Hand Spiral—These reamers pull chips upward as they cut, so they're often used in blind holes.

			Lg.
	Reamer Dia.	Material	Flute	Overall	No. of Flutes	Spiral Direction	Cutting Dia. Tolerance	For Use On		Each
Straight Flute







				Inch

				0.9063" (29/32")	High-Speed Steel	2 5/8"	10"	10	—	0" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	0000000


				0.9375" (15/16")	High-Speed Steel	2 5/8"	10"	10	—	0" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				0.9688" (31/32")	High-Speed Steel	2 5/8"	10"	10	—	0" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				0.9980"	High-Speed Steel	2 5/8"	10"	10	—	0" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	000000
				0.9995"	High-Speed Steel	2 5/8"	10"	10	—	0" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	000000
				1.0000" (1")	High-Speed Steel	2 3/4"	10 1/2"	10	—	0" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				1.0050"	High-Speed Steel	2 3/4"	10 1/2"	10	—	0" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	000000
				1.0100"	High-Speed Steel	2 3/4"	10 1/2"	10	—	0" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	000000
				1.0625" (1 1/16")	High-Speed Steel	2 3/4"	10 1/2"	10	—	0" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				1.1250" (1 1/8")	High-Speed Steel	2 7/8"	11"	10	—	0" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				1.1875" (1 3/16")	High-Speed Steel	2 7/8"	11"	10	—	0" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000




						Oversized Fractional Inch

						1.0010" (1" Oversized)	High-Speed Steel	2 3/4"	10 1/2"	10	—	0" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000




								Undersized Fractional Inch

								0.9990" (1" Undersized)	High-Speed Steel	2 5/8"	10"	10	—	0" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000




										Metric

										30.0000 mm	High-Speed Steel	73 mm	279.4 mm	10	—	0 mm to 0.005 mm	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	000000


										Spiral Flute







														Inch

														1.1875" (1 3/16")	High-Speed Steel	2 7/8"	11"	10	Right Hand	0.0001" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000


														1.2500" (1 1/4")	High-Speed Steel	3"	11 1/2"	10	Right Hand	0.0001" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
														1.3125" (1 5/16")	High-Speed Steel	3"	11 1/2"	10	Right Hand	0.0001" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
														1.3750" (1 3/8")	High-Speed Steel	3 1/4"	12"	10	Right Hand	0.0001" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
														1.5000" (1 1/2")	High-Speed Steel	3 1/2"	12 1/2"	10	Right Hand	0.0001" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000

Expandable Flutes, Round Shank

Straight Flute

Unlike standard reamers, which are unusable once they become worn, these can be returned to their original size for finishing holes. After the reamer is worn down, tighten the set screw to expand the diameter, grind the reamer to its original size, and get back to work.

These are not designed for producing holes larger than the listed diameter or for producing holes of various sizes. The set screw should not be loosened.

These reamers fit in the chuck of drill presses, turret lathes, and other machine and power tools, making them the most common shank type.

Straight Flute—The most common flute style, these reamers are suitable for a wide range of applications, but not recommended for holes with a keyway or other breaks in the surface.

Carbide-Tipped Tool Steel—Since these reamers retain a sharper, harder edge at higher temperatures than high-speed steel and cobalt steel, they can be used on hard materials, such as iron, hardened steel, and steel alloys. They aren't as brittle as solid carbide reamers, so they can be used in less rigid setups, such as a hand-held drill.

			Lg.
	Reamer Dia.	Material	Flute	Overall	No. of Flutes	Cutting Dia. Tolerance	Recommended Expansion Limit	For Use On		Each
Straight Flute







				Inch

				1.7500" (1 3/4")	Carbide-Tipped Tool Steel	2 3/8"	13 1/2"	10	0" to 0.0003"	0.015"	Aluminum, Brass, Bronze, Fiberglass, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	0000000	0000000

Square Shank

Straight Flute

Spiral Flute

Turn these reamers by hand with an adjustable wrench or straight-handle tap wrench (sold separately).

Straight Flute—The most common flute style, these reamers are suitable for a wide range of applications, but not recommended for holes with a keyway or other breaks in the surface.

High-Speed Steel—Durable and wear resistant, these are good for general purpose reaming in most materials.

Left-Hand Spiral—These reamers push chips downward as they cut, so they're often used in through holes.

				Lg.
	Reamer Dia.	Material	Square Shank Size	Flute	Overall	No. of Flutes	Spiral Direction	Cutting Dia. Tolerance	For Use On		Each
Straight Flute







				Inch

				1.2500" (1 1/4")	High-Speed Steel	0.935"	6 1/8"	12 1/4"	10	—	0.0001" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	0000000


				Spiral Flute







								Inch

								1.2500" (1 1/4")	High-Speed Steel	0.935"	6 1/8"	12 1/4"	10	Left Hand	0.0001" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000

Morse Taper Shank

Straight Flute

These reamers work with machine tools that have a Morse taper-spindle hole, such as a drill press or lathe.

Straight Flute—The most common flute style, these reamers are suitable for a wide range of applications, but not recommended for holes with a keyway or other breaks in the surface.

High-Speed Steel—Durable and wear resistant, these are good for general purpose reaming in most materials.

				Lg.
	Reamer Dia.	Material	Machine Taper No.	Flute	Overall	No. of Flutes	Cutting Dia. Tolerance	For Use On		Each
Straight Flute







				Inch

				1.1875" (1 3/16")	High-Speed Steel	Morse 3	2 7/8"	11"	10	0.0001" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	0000000


				1.2500" (1 1/4")	High-Speed Steel	Morse 4	3"	11 1/2"	10	0.0001" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				1.3750" (1 3/8")	High-Speed Steel	Morse 4	3 1/4"	12"	10	0.0001" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				1.5000" (1 1/2")	High-Speed Steel	Morse 4	3 1/2"	12 1/2"	10	0.0001" to 0.0004"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000

Reamers for Deburring

Smooth the inside and edges of holes with these reamers. Often used to finish holes in sheet metal or to remove burrs from the ends of cut pipe and conduit, they're also known as repairmen's reamers.

Round Shank

Spiral Flute

These reamers fit in the chuck of drill presses, turret lathes, and other machine and power tools, making them the most common shank type.

High-Speed Steel—Durable and wear resistant, these are good for general purpose reaming in most materials.

Left-Hand Spiral—These reamers push chips downward as they cut, so they're often used in through holes.

				Lg.
	For Pipe Size	Reamer Dia. (B to A)	Material	Flute	Overall	No. of Flutes	Spiral Direction	Cutting Dia. Tolerance	For Deburring	For Use On		Each
Spiral Flute







				Inch

				1/8 to 1	0.1875" to 1.2500" (3/16" to 1 1/4")	High-Speed Steel	3 1/32"	5 3/64"	10	Left Hand	-0.003" to 0.003"	Inner Pipe Edges, Inner Tube Edges, Inner Conduit Edges, Sheet Edges	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	0000000


				1/4 to 1 1/4	0.2500" to 1.4688" (1/4" to 1 15/32")	High-Speed Steel	3"	5"	10	Left Hand	-0.003" to 0.003"	Inner Pipe Edges, Inner Tube Edges, Inner Conduit Edges, Sheet Edges	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000

Reamers for Taper Pipe

Use these reamers to shape and finish a hole to a tapered pipe size before tapping.

Square Shank

Spiral Flute

Turn these reamers by hand with an adjustable wrench or straight-handle tap wrench (sold separately).

High-Speed Steel—Durable and wear resistant, these are good for general purpose reaming in most materials.

Left-Hand Spiral—These reamers push chips downward as they cut, so they're often used in through holes.

						Lg.
	For Pipe Size	Reamer Dia. (A)	Reamer Dia. (B)	Material	Square Shank Size	Flute	Overall	No. of Flutes	Spiral Direction	Cutting Dia. Tolerance	For Use On		Each
Spiral Flute







				Inch

				1	1.2120"	1.1030"	High-Speed Steel	0.8430"	1 3/4"	3 3/4"	10	Left Hand	-0.001" to 0.001"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	0000000

Reamers for Morse Taper-Socket Holes

Use these reamers to turn straight holes into Morse taper-socket holes that can hold cutting tools or adapters in machine spindles. They're also good for finishing existing Morse taper holes and removing nicks and burrs from spindles.

Square Shank

Straight Flute

Turn these reamers by hand with an adjustable wrench or straight-handle tap wrench (sold separately).

Straight Flute—The most common flute style, these reamers are suitable for a wide range of applications, but not recommended for holes with a keyway or other breaks in the surface.

High-Speed Steel—Durable and wear resistant, these are good for general purpose reaming in most materials.

	Reamers												Optional Straight-Handle Tap Wrenches
						Lg.
	For Machine Taper No.	Reamer Dia. (A)	Reamer Dia. (B)	Material	Square Shank Size	Flute	Overall	No. of Flutes	Cutting Dia. Tolerance	For Use On		Each		Each
Straight Flute







				Inch

				Morse 4	1.2890"	1.0170"	High-Speed Steel	0.8450"	5 1/4"	8 1/2"	10	-0.0005" to 0.0005"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	0000000	0000000	0000000


				Morse 5	1.7990"	1.4710"	High-Speed Steel	1.1250"	6 1/4"	9 3/4"	10	-0.0005" to 0.0005"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000	0000000	000000

Reamers for Taper-Pin Holes

Shape holes to match the profile of taper pins. After drilling a hole that matches the size of the small end of the taper pin you want to install, use these reamers to taper and finish the hole.

Square Shank


Straight Flute	Spiral Flute

Turn these reamers by hand with an adjustable wrench, straight-handle tap wrench, or pin vise (sold separately).

Straight Flute—The most common flute style, these reamers are suitable for a wide range of applications, but not recommended for holes with a keyway or other breaks in the surface.

High-Speed Steel—Durable and wear resistant, these are good for general purpose reaming in most materials.

Left-Hand Spiral—These reamers push chips downward as they cut, so they're often used in through holes.

						Lg.
	For Taper Pin No.	Reamer Dia. (A)	Reamer Dia. (B)	Material	Square Shank Size	Flute	Overall	No. of Flutes	Spiral Direction	Cutting Dia. Tolerance	Rate of Taper	For Use On		Each
Straight Flute







				Inch

				13	1.2590"	1.0090"	High-Speed Steel	0.7950"	12"	16"	10	—	0" to 0.5"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	0000000


				14	1.5420"	1.2500"	High-Speed Steel	1.0800"	14"	18 1/4"	10	—	0" to 0.5"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000


				Spiral Flute







								Inch

								13	1.2590"	1.0090"	High-Speed Steel	0.7950"	12"	16"	10	Left Hand	0" to 0.5"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000


								14	1.5420"	1.2500"	High-Speed Steel	1.0800"	14"	18 1/4"	10	Left Hand	0" to 0.5"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000