Adjustable Hand Reamers | McMaster-Carr

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150 Products

Reamer Type

Standard

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

138 products

For Hole Alignment

Enlarge holes to correct misalignment and overlap

12 products

Reamer Type

For Taper-Pin Holes

Shape holes to match the profile of taper pins

6 products

Size Adjustability

Adjustable

Finish multiple hole sizes with one tool by moving the adjustable blades

144 products

Reamers

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

Adjustable Size, Square Shank

Finish multiple hole sizes with one reamer by moving the adjustable blades within the diameter range. Convenient for maintenance work, these have a large diameter range and don't require powered tools. They're often used to make precise size adjustments during installation of bearings and bushings.

Move the blades by tightening and loosening the two nuts on the reamer. To measure size, adjust blades to a known size (such as a bushing or ring), or measure across two opposite blades with a micrometer. When the blades become worn, they can be reground or replaced.

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

Extension pilots (not included) can be used in place of the end adjustment nut to align holes that are spaced far apart.

Straight Blade—Use these reamers in straight holes that don't have a keyway or other breaks in the surface.

Angled Blade—These reamers are better than those with straight blades for finishing holes with breaks in the surface, such as a keyway.

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

Tool Steel—Typically more economical but less durable than high-speed steel, these are for general purpose reaming.

	Reamers								Replacement Blades			Optional Extension Pilots
	Reamer Dia.	Material	Square Shank Size	Overall Lg.	No. of Blades	For Use On		Each	Pkg. Qty.		Pkg.		Each
Straight Blade







				Inch

				0.2500" to 0.2813" (1/4" to 9/32")	High-Speed Steel	0.1160"	3 1/4"	4	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	3141A61	0000000	4	3141A71	0000000	3004A41	000000


				0.2813" to 0.3125" (9/32" to 5/16")	High-Speed Steel	0.1250"	3 5/8"	4	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	3141A62	000000	4	3141A72	000000	3004A42	00000
				0.3125" to 0.3438" (5/16" to 11/32")	High-Speed Steel	0.1560"	4"	4	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	3141A63	000000	4	3141A73	000000	3004A43	00000
				0.3438" to 0.3750" (11/32" to 3/8")	High-Speed Steel	0.1560"	4 1/4"	4	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	3141A64	000000	4	3141A74	000000	3004A44	00000
				0.3750" to 0.4063" (3/8" to 13/32")	High-Speed Steel	0.1710"	4 1/2"	4	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	3141A65	000000	4	3141A75	000000	3004A45	00000
				0.4063" to 0.4375" (13/32" to 7/16")	High-Speed Steel	0.1870"	4 3/4"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	3141A66	000000	6	3141A76	000000	3004A46	00000
				0.4375" to 0.4688" (7/16" to 15/32")	High-Speed Steel	0.1870"	5 1/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	3141A67	000000	6	3141A77	000000	3004A12	00000
				0.4688" to 0.5313" (15/32" to 17/32")	High-Speed Steel	0.1870"	5 5/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	3141A12	000000	6	3141A41	000000	3004A12	00000
				0.5313" to 0.5938" (17/32" to 19/32")	High-Speed Steel	0.2180"	5 5/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	3141A13	000000	6	3141A42	000000	3004A13	00000
				0.5938" to 0.6563" (19/32" to 21/32")	High-Speed Steel	0.2810"	6 5/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	3141A14	000000	6	3141A43	000000	3004A15	00000
				0.6563" to 0.7188" (21/32" to 23/32")	High-Speed Steel	0.3120"	6 7/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	3141A16	000000	6	3141A44	000000	3004A16	00000


				0.7188" to 0.7813" (23/32" to 25/32")	High-Speed Steel	0.3430"	7 1/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	3141A15	000000	6	3141A45	000000	3004A17	00000
				0.7813" to 0.8438" (25/32" to 27/32")	High-Speed Steel	0.4060"	7 1/2"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	3141A17	000000	6	3141A46	000000	3004A18	00000
				0.8438" to 0.9375" (27/32" to 15/16")	High-Speed Steel	0.4370"	8 1/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	3141A18	000000	6	3141A47	000000	3004A19	00000
				0.9375" to 1.0625" (15/16" to 1 1/16")	High-Speed Steel	0.5000"	9 1/4"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	3141A23	000000	6	3141A48	000000	3004A21	00000
				1.0625" to 1.1875" (1 1/16" to 1 3/16")	High-Speed Steel	0.5310"	10 1/4"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	3141A24	000000	6	3141A49	000000	3004A23	00000
				1.1875" to 1.3438" (1 3/16" to 1 11/32")	High-Speed Steel	0.6250"	11 1/4"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	3141A25	000000	6	3141A51	000000	3004A25	00000
				1.3438" to 1.5313" (1 11/32" to 1 17/32")	High-Speed Steel	0.6400"	12"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	3141A26	000000	6	3141A52	000000	3004A27	000000
				1.5313" to 1.7813" (1 17/32" to 1 25/32")	High-Speed Steel	0.7500"	14 1/4"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	3141A27	000000	6	3141A53	000000	3004A29	000000
				1.7813" to 2.0938" (1 25/32" to 2 3/32")	High-Speed Steel	0.9370"	16"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	3141A28	000000	6	3141A54	000000	3004A32	000000
				2.0938" to 2.4688" (2 3/32" to 2 15/32")	High-Speed Steel	1.1870"	18"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	3141A31	000000	6	3141A55	000000	3004A36	000000


				2.1875" to 2.5625" (2 3/16" to 2 9/16")	Tool Steel	1.2500"	18"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A43	000000	6	2987A83	000000	3004A35	000000
				2.5625" to 3.0000" (2 9/16" to 3")	Tool Steel	1.4680"	20"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A44	000000	6	2987A84	000000	3004A38	000000


				Angled Blade







								Inch

								0.4219" to 0.4531" (27/64" to 29/64")	Tool Steel	0.1870"	5 3/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A28	000000	6	2987A68	00000	3004A11	00000


								0.4219" to 0.4688" (27/64" to 15/32")	Tool Steel	0.1870"	5 3/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A1	000000	6	2987A5	00000	3004A11	00000
								0.4375" to 0.5000" (7/16" to 1/2")	Tool Steel	0.1870"	5 3/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A29	000000	6	2987A69	00000	3004A12	00000
								0.4688" to 0.5313" (15/32" to 17/32")	Tool Steel	0.1870"	5 5/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A11	000000	6	2987A51	00000	3004A12	00000
								0.5000" to 0.5625" (1/2" to 9/16")	Tool Steel	0.2180"	5 5/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A3	000000	6	2987A7	00000	3004A13	00000
								0.5313" to 0.5938" (17/32" to 19/32")	Tool Steel	0.2180"	5 5/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A12	000000	6	2987A52	00000	3004A13	00000
								0.5625" to 0.6250" (9/16" to 5/8")	Tool Steel	0.2640"	5 7/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A31	000000	6	2987A71	00000	3004A14	00000
								0.5938" to 0.6563" (19/32" to 21/32")	Tool Steel	0.2810"	6 5/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A13	000000	6	2987A53	00000	3004A15	00000
								0.6250" to 0.6875" (5/8" to 11/16")	Tool Steel	0.2810"	6 5/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A32	000000	6	2987A72	00000	3004A15	00000
								0.6563" to 0.7188" (21/32" to 23/32")	Tool Steel	0.3120"	6 7/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A14	000000	6	2987A54	00000	3004A16	00000
								0.6875" to 0.7500" (11/16" to 3/4")	Tool Steel	0.3120"	6 7/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A33	000000	6	2987A73	00000	3004A16	00000


0.7188" to 0.7813" (23/32" to 25/32")	Tool Steel							0.3430"	7 1/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A15	000000	6	2987A55	00000	3004A17	00000
0.7500" to 0.8125" (3/4" to 13/16")	Tool Steel							0.3430"	7 1/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A34	000000	6	2987A74	00000	3004A17	00000
0.7813" to 0.8438" (25/32" to 27/32")	Tool Steel							0.4060"	7 1/2"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A16	000000	6	2987A56	00000	3004A18	00000
0.8125" to 0.8750" (13/16" to 7/8")	Tool Steel							0.4060"	7 1/2"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A35	000000	6	2987A75	00000	3004A18	00000
0.8438" to 0.9375" (27/32" to 15/16")	Tool Steel	0.4370"						8 1/8"	6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A17	000000	6	2987A57	00000	3004A19	00000
0.8750" to 1.0000" (7/8" to 1")	Tool Steel	0.4370"	8 1/8"					6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A36	000000	6	2987A76	00000	3004A19	00000
0.9375" to 1.0625" (15/16" to 1 1/16")	Tool Steel	0.5000"	9 1/4"					6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A18	000000	6	2987A58	00000	3004A21	00000
1.0000" to 1.1250" (1" to 1 1/8")	Tool Steel	0.5000"	9 1/4"					6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A37	000000	6	2987A77	00000	3004A21	00000
1.0625" to 1.1875" (1 1/16" to 1 3/16")	Tool Steel	0.5310"	10 1/4"					6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A19	000000	6	2987A59	00000	3004A23	00000
1.1250" to 1.2500" (1 1/8" to 1 1/4")	Tool Steel	0.5490"	10 1/4"					6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A38	000000	6	2987A78	00000	3004A24	00000


1.1875" to 1.3438" (1 3/16" to 1 11/32")	Tool Steel	0.6250"	11 1/4"					6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A2	000000	6	2987A6	000000	3004A25	00000
1.2500" to 1.4375" (1 1/4" to 1 7/16")	Tool Steel	0.6250"	11 1/4"					6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A39	000000	6	2987A79	000000	3004A25	00000
1.3438" to 1.5313" (1 11/32" to 1 17/32")	Tool Steel	0.6400"	12"					6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A21	000000	6	2987A61	000000	3004A27	000000
1.4375" to 1.6250" (1 7/16" to 1 5/8")	Tool Steel	0.7500"	12"					6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A4	000000	6	2987A8	000000	3004A28	000000
1.5313" to 1.7813" (1 17/32" to 1 25/32")	Tool Steel	0.7500"	14 1/4"					6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A22	000000	6	2987A62	000000	3004A29	000000
1.6250" to 1.8750" (1 5/8" to 1 7/8")	Tool Steel	0.8750"	14 1/4"					6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A41	000000	6	2987A81	000000	3004A31	000000
1.7813" to 2.0938" (1 25/32" to 2 3/32")	Tool Steel	0.9370"	16"					6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A23	000000	6	2987A63	000000	3004A32	000000
1.8750" to 2.1875" (1 7/8" to 2 3/16")	Tool Steel	1.0320"	16"					6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A42	000000	6	2987A82	000000	3004A66	000000
2.0938" to 2.4688" (2 3/32" to 2 15/32")	Tool Steel	1.1870"	18"					6	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A24	000000	6	2987A64	000000	3004A36	000000

Reamer Sets

Keep a variety of reamer sizes on hand for finishing holes.

Adjustable Size, Square Shank

Work on a wide range of hole diameters by keeping a set of adjustable reamers on hand. Each reamer can finish multiple hole sizes by moving the adjustable blades within the diameter range. Convenient for maintenance work, these don't require powered tools. They're often used to make precise size adjustments during installation of bearings and bushings.

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

Straight Blade—Use these reamers in straight holes that don't have a keyway or other breaks in the surface.

Angled Blade—These reamers are better than those with straight blades for finishing holes with breaks in the surface, such as a keyway.

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

Tool Steel—Typically more economical but less durable than high-speed steel, these are for general purpose reaming.

	Container Type	For Use On		Each
Straight Blade







	Inch

	1/4"-15/32"	7	High-Speed Steel	Wood Case	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	3141A79	000000000


	Angled Blade







					Inch

					7/16"-1 1/4"	10	Tool Steel	Wood Case	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A95	00000000


					15/32"-1 1/16"	8	Tool Steel	Wood Case	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A91	00000000
					15/32"-1 17/32"	11	Tool Steel	Wood Case	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	2987A93	00000000

Reamer Sets for Taper-Pin Holes

Used for shaping holes to match the profile of taper pins, these sets include a variety of reamer sizes. Drill a hole that matches the size of the small end of the taper pin you want to install, and then ream to taper and finish the hole.

Square Shank

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.

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.

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.

	Spiral Direction	Rate of Taper	Container Type	For Use On		Each
Straight Flute







	Inch

	7/0-0	7	High-Speed Steel	—	1:48	Plastic Case	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	2990A67	0000000


	0-5	6	High-Speed Steel	—	1:48	Plastic Case	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	2990A72	000000
	0-10	11	High-Speed Steel	—	1:48	Plastic Case	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	2990A76	000000


	Spiral Flute







					Inch

					7/0-0	7	High-Speed Steel	Left Hand	1:48	Plastic Case	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	2990A69	000000


					0-5	6	High-Speed Steel	Left Hand	1:48	Plastic Case	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	2990A74	000000
					0-10	11	High-Speed Steel	Left Hand	1:48	Plastic Case	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	2990A78	000000

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.

Adjustable Size, Square Shank

Angled Blade

One tool both finishes multiple diameters and enlarges holes to correct misalignment and overlap. Also known as bridge and car reamers, they have a tapered shape that fits into the narrow entry of misaligned holes and makes more contact to remove the overlapping material. Change the reamer size by moving the adjustable blades within the diameter range.

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

Angled Blade—These reamers are better than those with straight blades for finishing holes with breaks in the surface, such as a keyway.

Tool Steel—Typically more economical but less durable than high-speed steel, these are for general purpose reaming.

Long Reach—Align holes spaced far apart with reamers that have a long, built-in pilot. A floating sleeve guides and steadies the pilot through holes.

	Reamers										Replacement Blades
				Lg.
	Reamer Dia.	Material	Square Shank Size	Pilot	Overall	No. of Blades	Performance	For Use On		Each	Pkg. Qty.		Pkg.
Angled Blade







				Inch

				0.4688" to 0.5313" (15/32" to 17/32")	Tool Steel	0.1870"	10"	15 5/8"	6	Long Reach	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	3027A11	0000000	6	2987A51	000000


				0.5313" to 0.5938" (17/32" to 19/32")	Tool Steel	0.2180"	10"	15 5/8"	6	Long Reach	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	3027A12	000000	6	2987A52	00000
				0.5938" to 0.6563" (19/32" to 21/32")	Tool Steel	0.2810"	12"	18 5/8"	6	Long Reach	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	3027A13	000000	6	2987A53	00000
				0.7188" to 0.7813" (23/32" to 25/32")	Tool Steel	0.3430"	16"	23 1/8"	6	Long Reach	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	3027A15	000000	6	2987A55	00000
				0.7813" to 0.8438" (25/32" to 27/32")	Tool Steel	0.4060"	16"	23 1/2"	6	Long Reach	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	3027A16	000000	6	2987A56	00000
				0.9375" to 1.0625" (15/16" to 1 1/16")	Tool Steel	0.5000"	18"	27 1/8"	6	Long Reach	Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium	3027A18	000000	6	2987A58	00000