0.1890" 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.

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.

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.

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







				Wire Gauge

				0.1890" (12 Ga.)	High-Speed Steel	1 1/8"	4 1/2"	6	—	0" to 0.0002"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000


				0.1890" (12 Ga.)	Cobalt Steel	1 1/8"	4 1/2"	6	—	0" to 0.0002"	Aluminum, Brass, Bronze, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	0000000	00000
				0.1890" (12 Ga.)	Carbide	7/8"	2 3/4"	4	—	0" to 0.0002"	Aluminum, Brass, Bronze, Fiberglass, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	000000000	00000


				Spiral Flute







								Wire Gauge

								0.1890" (12 Ga.)	High-Speed Steel	1 1/8"	4 1/2"	6	Right Hand	0" to 0.0002"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	00000000	00000

Threaded Shank

Straight Flute

These reamers fit power drills that have a _1/4"-28 threaded spindle or adapter. Using a powered hand tool can affect alignment, so these have a built-in pilot that guides the reamer into the hole and keeps it straight.

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.	Pilot Dia.	Material	Flute	Pilot	Overall	No. of Flutes	Cutting Dia. Tolerance	Pilot Cutting Dia. Tolerance	For Use On		Each
Straight Flute







				Inch

				0.1890"	0.180"	High-Speed Steel	1 1/2"	1/2"	2 1/8"	6	0" to 0.0002"	-0.001" to 0"	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000

Reamer Sets

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

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.

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

Jobbers' Length—The same length as jobbers' drill bits, these reamers save setup time when you want to drill and ream on the same machine, such as a drill press or bench lathe.

	Lg. Class	Container Type	For Use On		Each
Straight Flute







	Wire Gauge

	1-60	60	High-Speed Steel	—	Metal Case	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000000


	1-60	60	High-Speed Steel	Jobbers	Metal Case	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	000000	000000