Spiral Helix Reamers | McMaster-Carr

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44 Products

Reamers for Hole Alignment

Enlarge holes to correct misalignment and overlap. Misaligned holes often have a narrow entry, so the tapered shape is easier to insert and makes more contact to remove the overlapping material. These are also known as bridge and car reamers.

Hex Shank

Helix Flute

The shank fits hex impact sockets, so you can use an impact wrench to both ream the hole and install a fastener.

Helix Flute—Prevent clogging when removing excess material with helix flutes. They also leave a smoother finish than straight flutes.

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.

Strong Hold—Magnets on the shank’s end keep these reamers from accidentally falling out of your tool.

					Lg.
	Reamer Dia. (A)	Reamer Dia. (B)	Material	Hex Shank Size	Flute	Overall	Spiral Direction	Cutting Dia. Tolerance	Performance	For Use On		Each
Helix Flute





				Inch
				0.8125" (13/16")	0.4688"	High-Speed Steel	1 1/4"	5"	7"	Left Hand	0" to 0.01"	Strong Hold	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	0000000
				0.9375" (15/16")	0.5938"	High-Speed Steel	1 7/16"	5"	7"	Left Hand	0" to 0.01"	Strong Hold	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				1.0625" (1 1/16")	0.8125"	High-Speed Steel	1 5/8"	5"	7"	Left Hand	0" to 0.01"	Strong Hold	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				1.1250" (1 1/8")	0.8594"	High-Speed Steel	1 5/8"	5"	7"	Left Hand	0" to 0.01"	Strong Hold	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				2.0000" (2")	1.7500"	High-Speed Steel	2"	7 3/8"	11 1/2"	Left Hand	0" to 0.01"	Strong Hold	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	000000



						Metric
						16.0000 mm	7.9000 mm	High-Speed Steel	24 mm	114 mm	152 mm	Left Hand	0 mm to 0.254 mm	Strong Hold	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	00000
						18.0000 mm	10.0000 mm	High-Speed Steel	24 mm	114 mm	165 mm	Left Hand	0 mm to 0.254 mm	Strong Hold	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	00000
						20.0000 mm	11.9000 mm	High-Speed Steel	32 mm	114 mm	178 mm	Left Hand	0 mm to 0.254 mm	Strong Hold	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	00000
						22.0000 mm	13.9000 mm	High-Speed Steel	36 mm	127 mm	178 mm	Left Hand	0 mm to 0.254 mm	Strong Hold	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	000000
						28.0000 mm	21.5000 mm	High-Speed Steel	41 mm	127 mm	178 mm	Left Hand	0 mm to 0.254 mm	Strong Hold	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	000000
						32.0000 mm	25.0000 mm	High-Speed Steel	46 mm	127 mm	178 mm	Left Hand	0 mm to 0.254 mm	Strong Hold	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	000000
						36.0000 mm	30.0000 mm	High-Speed Steel	46 mm	127 mm	200 mm	Left Hand	0 mm to 0.254 mm	Strong Hold	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	000000
						39.0000 mm	33.5000 mm	High-Speed Steel	50 mm	127 mm	200 mm	Left Hand	0 mm to 0.254 mm	Strong Hold	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	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.

Round Shank

Helix 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.

Helix Flute—Prevent clogging when removing excess material with helix flutes. They also leave a smoother finish than straight flutes.

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	Flute	Overall	No. of Flutes	Spiral Direction	Cutting Dia. Tolerance	Rate of Taper	For Use On		Each
Helix Flute





				Inch
				7/0	0.0666"	0.0497"	High-Speed Steel	13/16"	1 13/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				6/0	0.0806"	0.0611"	High-Speed Steel	15/16"	1 15/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	00000
				5/0	0.0966"	0.0719"	High-Speed Steel	1 3/16"	2 3/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	00000
				4/0	0.1142"	0.0869"	High-Speed Steel	1 5/16"	2 5/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	00000
				3/0	0.1302"	0.1029"	High-Speed Steel	1 5/16"	2 5/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	00000
				2/0	0.1462"	0.1137"	High-Speed Steel	1 9/16"	2 9/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	00000
				0	0.1638"	0.1287"	High-Speed Steel	1 11/16"	2 15/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	00000
				1	0.1798"	0.1447"	High-Speed Steel	1 11/16"	2 15/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	00000
				2	0.2008"	0.1605"	High-Speed Steel	1 15/16"	3 3/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	00000
				3	0.2294"	0.1813"	High-Speed Steel	2 5/16"	3 11/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	00000
				4	0.2604"	0.2071"	High-Speed Steel	2 9/16"	4 1/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	00000
				5	0.2994"	0.2409"	High-Speed Steel	2 13/16"	4 5/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	00000
				6	0.3540"	0.2773"	High-Speed Steel	3 11/16"	5 7/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				7	0.4220"	0.3297"	High-Speed Steel	4 7/16"	6 5/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				8	0.5050"	0.3971"	High-Speed Steel	5 3/16"	7 3/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				9	0.6066"	0.4805"	High-Speed Steel	6 1/16"	8 5/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				10	0.7216"	0.5799"	High-Speed Steel	6 13/16"	9 5/16"	4	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				11	0.8780"	0.7060"	High-Speed Steel	8 1/4"	11 1/4"	4	Left Hand	0" to 0.5"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				12	1.0500"	0.8420"	High-Speed Steel	10"	13 7/8"	4	Left Hand	0" to 0.5"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				13	1.2590"	1.0090"	High-Speed Steel	12"	16"	6	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	14"	18 1/4"	6	Left Hand	0" to 0.5"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	00000000



						Metric
						2	2.8600 mm	1.9000 mm	High-Speed Steel	48 mm	73 mm	3	Left Hand	-0.0254 mm to 0.0254 mm	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	00000
						2.5	3.4600 mm	2.4000 mm	High-Speed Steel	53 mm	79 mm	3	Left Hand	-0.0254 mm to 0.0254 mm	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	00000
						3	4.1600 mm	2.9000 mm	High-Speed Steel	63 mm	88 mm	3	Left Hand	-0.0254 mm to 0.0254 mm	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	00000
						4	5.4000 mm	3.9000 mm	High-Speed Steel	75 mm	100 mm	3	Left Hand	-0.0254 mm to 0.0254 mm	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	00000
						5	6.6400 mm	4.9000 mm	High-Speed Steel	87 mm	115 mm	3	Left Hand	-0.0254 mm to 0.0254 mm	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	00000
						6	8.2800 mm	5.9000 mm	High-Speed Steel	119 mm	150 mm	3	Left Hand	-0.0254 mm to 0.0254 mm	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	00000
						8	10.7200 mm	7.9000 mm	High-Speed Steel	141 mm	177 mm	3	Left Hand	-0.0254 mm to 0.0254 mm	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	00000
						10	13.1600 mm	9.9000 mm	High-Speed Steel	163 mm	205 mm	3	Left Hand	-0.0254 mm to 0.0254 mm	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	000000
						12	15.7400 mm	11.8600 mm	High-Speed Steel	194 mm	240 mm	3	Left Hand	-0.0254 mm to 0.0254 mm	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	000000
						13	16.7400 mm	12.8000 mm	High-Speed Steel	194 mm	240 mm	3	Left Hand	-0.0254 mm to 0.0254 mm	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	000000