16 mm Reamers | McMaster-Carr

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.

Cobalt Steel—With better heat and wear resistance than high-speed steel, these reamers run up to 25% faster, last longer, and perform better on hard materials, such as cast iron, hardened steel, titanium, and stainless steel.

Carbide—For the highest level of accuracy when cutting hard materials, these are our hardest, strongest, and most wear-resistant reamers. They're used on materials such as iron, hardened steel, steel alloys, and plastic. Their hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent the reamer from breaking.

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





				Metric
				16.0000 mm	High-Speed Steel	57.2	228.6	8	0.0025 to 0.01	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
				16.0000 mm	Cobalt Steel	57.2	228.6	8	0 to 0.005	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel, Tool Steel, Hardened Steel	00000000	00000
				16.0000 mm	Carbide	44.4	101.6	6	0 to 0.0003	Aluminum, Brass, Bronze, Fiberglass, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	000000000	000000

Square Shank

Spiral Flute

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

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.

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





				Metric
				16.0000 mm	High-Speed Steel	12	87	175	8	Left Hand	0.008 to 0.015	DIN 206	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	0000000

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





				Metric
				16.0000 mm	7.9000	High-Speed Steel	24	114	152	Left Hand	0 to 0.254	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.

Square Shank

Straight 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.

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





				Metric
				12 mm	16.0000	11.8000	High-Speed Steel	11.2	210	255	8	0 to 0.125	1:50	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	0000000