O-Flute Bits | McMaster-Carr

Filter by

Cutting Diameter

For Use On

Shank Diameter

Chip Removal Direction

Flute Type

Tool Type

Length of Cut

Cut Style

Material

Overall Length

Finish

Length

REACH

RoHS

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

Cut Radius

Cut Angle

Router Bit Pilot Type

Wood Joint Type

82 Products

Straight and Spiral Router Bits for Aluminum

Also known as O-flute bits, the flutes on these bits are open and rounded for efficient chip removal when cutting aluminum. This also reduces heat to prevent melting or warping. Use these bits to create square slots, pockets, and edges. They are plunge cutting, letting you cut directly into the workpiece from above. They do not have a pilot, so guide your router along a straight edge when hand routing to make accurate cuts.

Uncoated High-Speed Steel


Square Cut Style—Plunge-Cut	Square Cut Style—Plunge-Cut, Straight Flute

High-speed steel bits can be used with hand routers, router tables, and CNC machines.

Straight Flute—Bits with straight flutes are for general purpose use. They quickly remove material, leaving a rough finish.

Upward Chip Removal—Bits with upward chip removal lift chips up for applications that require a smooth finish on the bottom edge of the cut. Securely clamp the workpiece before routing to prevent lifting.

1 Flute—Choose a bit with one flute for a faster cut.

	Overall Lg.	No. of Flutes	For Tool Type	For Use On		Each
Square Cut Style—Plunge-Cut







	Straight Flutes with Upward Chip Removal

	1/8"	1/2"	1/4"	2"	1	Hand Router, Router Table, CNC Machine	Aluminum	0000000	000000


	3/16"	5/8"	1/4"	2 1/2"	1	Hand Router, Router Table, CNC Machine	Aluminum	0000000	00000
	1/4"	3/4"	1/4"	2 1/2"	1	Hand Router, Router Table, CNC Machine	Aluminum	0000000	00000
	1/2"	1"	1/2"	3"	1	Hand Router, Router Table, CNC Machine	Aluminum	0000000	00000

Uncoated Carbide

Carbide bits have a longer life and faster cutting speeds than high-speed steel bits. Their extreme hardness makes them brittle, so they’re not recommended for use with hand tools. A highly rigid setup, such as a CNC machine, is necessary to keep bits from breaking.

Straight Flute—Bits with straight flutes are for general purpose use. They quickly remove material, leaving a rough finish.

Spiral Flute—Bits with spiral flutes leave a smoother finish than straight-flute bits and make plunge cuts more easily.

Downward Chip Removal—Bits with downward chip removal push chips down for applications that require a smooth finish on the cut's top edge.

1 Flute—Choose a bit with one flute for a faster cut.

	Overall Lg.	No. of Flutes	For Tool Type	For Use On		Each
Square Cut Style—Plunge-Cut







	Straight Flutes with Upward Chip Removal

	1/8"	1/2"	1/4"	2"	1	CNC Machine	Aluminum	0000000	000000


	3/16"	5/8"	1/4"	2"	1	CNC Machine	Aluminum	0000000	00000
	1/4"	3/4"	1/4"	2 1/2"	1	CNC Machine	Aluminum	0000000	00000
	1/4"	1"	1/4"	3"	1	CNC Machine	Aluminum	0000000	00000
	5/16"	13/16"	3/8"	2 1/2"	1	CNC Machine	Aluminum	0000000	00000
	3/8"	7/8"	3/8"	2 1/2"	1	CNC Machine	Aluminum	0000000	00000
	7/16"	1"	1/2"	3"	1	CNC Machine	Aluminum	0000000	000000
	1/2"	1"	1/2"	3"	1	CNC Machine	Aluminum	0000000	000000




			Spiral Flutes with Upward Chip Removal

			1/8"	1/4"	1/8"	1 1/2"	1	CNC Machine	Aluminum	0000000	00000


			1/8"	1/2"	1/4"	2"	1	CNC Machine	Aluminum	0000000	00000
			3/16"	3/8"	1/4"	2"	1	CNC Machine	Aluminum	0000000	00000
			3/16"	5/8"	1/4"	2"	1	CNC Machine	Aluminum	0000000	00000
			1/4"	3/8"	1/4"	2"	1	CNC Machine	Aluminum	0000000	00000
			1/4"	1 1/4"	1/4"	3"	1	CNC Machine	Aluminum	0000000	00000
			3/8"	3/4"	3/8"	3"	1	CNC Machine	Aluminum	0000000	00000
			3/8"	1 1/8"	3/8"	3"	1	CNC Machine	Aluminum	0000000	000000




					Spiral Flutes with Downward Chip Removal

					1/8"	1/4"	1/8"	1 1/2"	1	CNC Machine	Aluminum	0000000	00000


					1/8"	1/4"	1/4"	2"	1	CNC Machine	Aluminum	0000000	00000
					3/16"	3/8"	1/4"	2"	1	CNC Machine	Aluminum	0000000	00000
					3/16"	5/8"	1/4"	2"	1	CNC Machine	Aluminum	0000000	00000
					1/4"	3/8"	1/4"	2"	1	CNC Machine	Aluminum	0000000	00000
					1/4"	1 1/4"	1/4"	3"	1	CNC Machine	Aluminum	0000000	00000
					3/8"	1/8"	3/8"	3"	1	CNC Machine	Aluminum	0000000	000000
					3/8"	3/4"	3/8"	3"	1	CNC Machine	Aluminum	0000000	000000

Straight and Spiral Router Bits for Plastic

The smooth flutes and sharp cutting edges on these router bits cleanly cut square slots, pockets, and edges in most plastics, including polyethylene, polycarbonate, and vinyl. They do not have a pilot, so guide your router along a straight edge when hand routing to make accurate cuts.

Uncoated High-Speed Steel


Square Cut Style	Straight Flute

High-speed steel bits are for general purpose use. They can be used with hand tools, router tables, and CNC machines.

Straight Flutes—Bits with straight flutes are for general purpose use. They quickly remove material, leaving a rough finish.

1 Flute—Choose a bit with one flute for a faster cut; bits with more flutes produce a smoother finish.

	Overall Lg.	No. of Flutes	For Tool Type	For Use On		Each
Square Cut Style







	Straight Flutes

	1/8"	1/2"	1/4"	2"	1	Hand Router, Router Table, CNC Machine	Hard Plastic, Soft Plastic	00000000	000000

Uncoated Carbide

Square Cut Style

Square Cut

Style—Plunge-Cut

Straight Flute

Square Cut Style

Spiral Flute

Square Cut

Style—Plunge-Cut,

Spiral Flute

Use carbide bits for longer tool life and faster cutting speeds than high-speed steel.

Plunge Cut—Bits with a plunge cut type let you cut directly into the workpiece from above. Other bits are best for operations where the peripheral teeth do most of the work such as trimming, contouring, and finishing.

Straight Flutes—Bits with straight flutes are for general purpose use. They quickly remove material, leaving a rough finish.

Spiral Flute—Bits with spiral flutes leave a smoother finish than straight-flute bits.

Downward Chip Removal—Bits with downward chip removal push chips down for applications that require a smooth finish on the cut's top edge.

1 Flute—Choose a bit with one flute for a faster cut; bits with more flutes produce a smoother finish.

	Overall Lg.	No. of Flutes	For Tool Type	For Use On		Each
Square Cut Style







	Straight Flutes

	1/4"	3/4"	1/4"	2 1/2"	1	CNC Machine	Hard Plastic, Soft Plastic	00000000	000000


	3/8"	7/8"	3/8"	2 1/2"	1	CNC Machine	Hard Plastic, Soft Plastic	00000000	00000
	1/2"	1"	1/2"	3"	1	CNC Machine	Hard Plastic, Soft Plastic	00000000	00000




			Spiral Flutes with Upward Chip Removal

			1/8"	1/2"	1/8"	2"	1	CNC Machine	Hard Plastic, Soft Plastic	0000000	00000




					Spiral Flutes with Downward Chip Removal

					1/8"	1/2"	1/8"	2"	1	CNC Machine	Hard Plastic, Soft Plastic	0000000	00000


					Square Cut Style—Plunge-Cut







									Spiral Flutes with Upward Chip Removal

									1/16"	1/4"	1/4"	2"	1	CNC Machine	Hard Plastic, Soft Plastic	0000000	00000


									3/32"	1/4"	1/8"	2"	1	CNC Machine	Hard Plastic, Soft Plastic	0000000	00000
									5/32"	9/16"	1/4"	2"	1	CNC Machine	Hard Plastic, Soft Plastic	0000000	00000
									3/16"	5/8"	1/4"	2"	1	CNC Machine	Hard Plastic, Soft Plastic	0000000	00000
									7/32"	3/4"	1/4"	2 1/2"	1	CNC Machine	Hard Plastic, Soft Plastic	0000000	00000
									3/8"	5/8"	3/8"	2 1/2"	1	CNC Machine	Hard Plastic, Soft Plastic	0000000	00000
									1/2"	1 1/4"	1/2"	3"	1	CNC Machine	Hard Plastic, Soft Plastic	0000000	000000




											Spiral Flutes with Downward Chip Removal

											1/16"	1/4"	1/8"	2"	1	CNC Machine	Hard Plastic, Soft Plastic	0000000	00000


											5/32"	9/16"	1/4"	2"	1	CNC Machine	Hard Plastic, Soft Plastic	0000000	00000
											3/16"	5/8"	1/4"	2"	1	CNC Machine	Hard Plastic, Soft Plastic	0000000	00000

Ceramic-Coated Carbide

Straight Flute

Square Cut Style

Spiral Flute

Ceramic-coated carbide bits have a coating that increases the hardness of the bits and protects them from high heat, making them last about 2.5 times longer than uncoated bits. Use carbide bits for longer tool life and faster cutting speeds than high-speed steel.

Straight Flutes—Bits with straight flutes are for general purpose use. They quickly remove material, leaving a rough finish.

Spiral Flute—Bits with spiral flutes leave a smoother finish than straight-flute bits.

Downward Chip Removal—Bits with downward chip removal push chips down for applications that require a smooth finish on the cut's top edge.

1 Flute—Choose a bit with one flute for a faster cut; bits with more flutes produce a smoother finish.

	Overall Lg.	No. of Flutes	For Tool Type	For Use On		Each
Square Cut Style







	Straight Flutes

	1/8"	1/2"	1/4"	2"	1	Hand Router, Router Table, CNC Machine	Hard Plastic, Soft Plastic	0000000	000000


	3/16"	5/8"	1/4"	2"	1	Hand Router, Router Table, CNC Machine	Hard Plastic, Soft Plastic	0000000	00000




			Spiral Flutes with Upward Chip Removal

			1/16"	1/4"	1/8"	2"	1	Hand Router, Router Table, CNC Machine	Hard Plastic, Soft Plastic	0000000	00000


			1/8"	1/4"	1/4"	2"	1	Hand Router, Router Table, CNC Machine	Hard Plastic, Soft Plastic	0000000	00000
			1/8"	3/4"	1/8"	2"	1	Hand Router, Router Table, CNC Machine	Hard Plastic, Soft Plastic	0000000	00000
			1/4"	3/8"	1/4"	2"	1	Hand Router, Router Table, CNC Machine	Hard Plastic, Soft Plastic	0000000	00000




					Spiral Flutes with Downward Chip Removal

					1/16"	1/4"	1/8"	2"	1	Hand Router, Router Table, CNC Machine	Hard Plastic, Soft Plastic	0000000	00000


					1/8"	1/2"	1/4"	2"	1	Hand Router, Router Table, CNC Machine	Hard Plastic, Soft Plastic	0000000	00000

Chamfering Router Bits

Chamfering Cut Style

These bits make chamfer, bevel, and other angled cuts in wood.

Uncoated Carbide

Chamfering Cut

Style, Straight

Flutes, Solid

Solid carbide bits offer the longest tool life and fastest cutting speeds, so they can be used on wood and laminate. A solid pilot guides the bit while routing. The extreme hardness of these bits makes them brittle, so they're not recommended for use with hand tools. A highly rigid setup, such as a CNC machine, is necessary to prevent the bit from breaking.

	Shank Dia.	Overall Lg.	Router Bit Pilot Type	No. of Flutes	For Tool Type	For Use On		Each
Chamfering Cut Style







	Straight Flutes

	1/4"	1/4"	7°	1/4"	1 1/2"	Solid	1	CNC Machine	Wood, Laminate	00000000	000000

Corner-Rounding Router Bits

Choose from bits that form a variety of shapes along the edges of your workpiece.

Uncoated Carbide

Rounded Corner Style

Use solid carbide bits to round off sharp edges on plastic sheets. Their extreme hardness makes them brittle, so they’re not recommended for use with hand tools. A highly rigid setup, such as a CNC machine, is necessary to prevent the bit from breaking.

	Shank Dia.	Overall Lg.	No. of Flutes	For Tool Type	For Use On		Each
Rounded Corner Style







	Straight Flutes

	1/4"	1/8"	3/8"	1/4"	2 1/2"	1	CNC Machine	Hard Plastic, Soft Plastic	0000000	000000


	1/4"	3/16"	3/8"	1/4"	2 1/2"	1	CNC Machine	Hard Plastic, Soft Plastic	0000000	00000
	1/4"	1/4"	3/8"	1/4"	2 1/2"	1	CNC Machine	Hard Plastic, Soft Plastic	0000000	00000

Panel Pilot Router Bits

The pointed tip creates starter holes for efficient plunge cutting in wood. For precise cutouts, use the tip as a pilot and guide the bit along a template placed below the workpiece.

Uncoated High-Speed Steel


Panel Pilot Cut Style	Panel-Pilot Cut Style, Spiral Flutes

Spiral Flutes—Bits with spiral flutes leave a smoother finish than straight-flute bits and make plunge cuts more easily. They're made of high-speed steel and can be used with hand tools, router tables, and CNC machines.

	Overall Lg.	Router Bit Pilot Type	No. of Flutes	For Tool Type	For Use On		Each
Panel-Pilot Cut Style







	Spiral Flutes

	1/4"	5/8"	1/4"	2 3/4"	Solid	1	Hand Router, Router Table, CNC Machine	Wood, Particleboard, Plywood	00000000	000000


	1/2"	1 1/4"	1/2"	3 13/16"	Solid	1	Hand Router, Router Table, CNC Machine	Wood, Particleboard, Plywood	00000000	00000
	1/2"	2 1/8"	1/2"	4 1/2"	Solid	1	Hand Router, Router Table, CNC Machine	Wood, Particleboard, Plywood	00000000	00000

Uncoated Carbide-Tipped High-Speed Steel


Panel Pilot Cut Style	Panel-Pilot Cut Style, Straight Flutes

Straight Flutes—Bits with straight flutes are for general purpose use. They quickly remove material, leaving a rough finish. Made of carbide-tipped high-speed steel, these bits provide a longer tool life and faster cutting speeds than standard high-speed steel bits.

	Overall Lg.	Router Bit Pilot Type	No. of Flutes	For Tool Type	For Use On		Each
Panel-Pilot Cut Style







	Straight Flutes

	1/4"	3/4"	1/4"	2 9/16"	Solid	1	Hand Router	Wood, Particleboard, Plywood	0000000	000000


	3/8"	1"	3/8"	3"	Solid	1	Hand Router	Wood, Particleboard, Plywood	0000000	00000
	1/2"	1 3/16"	1/2"	3 1/2"	Solid	1	Hand Router	Wood, Particleboard, Plywood	0000000	00000

Router Bits for Wood Joining

Create shapes that fit together to form wood joints commonly used to build doors and frames.

Wedge-Tongue Wood Joint—Uncoated Carbide-Tipped Steel

	Overall Lg.	No. of Flutes	For Tool Type	For Use On		Each
Joining Cut Style







	Straight Flutes

	1 1/4"	1 1/4"	1/2"	2 3/4"	1	Hand Router, Router Table	Wood, Particleboard, Plywood	0000000	000000

Wedge-Groove Wood Joint—Uncoated Carbide-Tipped Steel

	Overall Lg.	No. of Flutes	For Tool Type	For Use On		Each
Joining Cut Style







	Straight Flutes

	1/2"	1 1/4"	1/2"	2 3/4"	1	Hand Router, Router Table	Wood, Particleboard, Plywood	0000000	000000

Lock-Miter Wood Joint—Uncoated Carbide-Tipped Steel

Create right-angle and glue joints. Using a router table, create this two-piece joint by first cutting along the short edge of one piece of wood, then along the long edge of the other piece of wood.

	Overall Lg.	No. of Flutes	For Tool Type	For Use On		Each
Joining Cut Style







	Straight Flutes

	2 5/8"	1 3/16"	1/2"	2 5/8"	1	Hand Router, Router Table	Wood, Particleboard, Plywood	0000000	0000000

Dovetail Wood Joint—Uncoated Carbide-Tipped Steel

	Overall Lg.	No. of Flutes	For Tool Type	For Use On		Each
Joining Cut Style







	Straight Flutes

	1/2"	1/2"	1/4"	2"	1	Hand Router, Router Table	Wood, Particleboard, Plywood	0000000	000000


	17/32"	1/2"	1/4"	1 7/8"	1	Hand Router, Router Table	Wood, Particleboard, Plywood	0000000	00000

Keyhole Wood Joint—Uncoated Carbide-Tipped Steel

Keyhole joints are often used as wall-mounting slots.

	Overall Lg.	No. of Flutes	For Tool Type	For Use On		Each
Joining Cut Style







	Straight Flutes

	3/8"	7/16"	1/4"	1 9/16"	1	Hand Router, Router Table	Wood, Particleboard, Plywood	0000000	000000

Router Bits for Thin Materials

Make shallow incisions in fabric, leather, and rubber. Unlike other router bits, these bits do not spin or rotate; instead, the blade follows the motion of the CNC machine, behaving like a rudder as it cuts through material. These bits are plunge cutting, letting you cut directly into the workpiece from above.

Uncoated Carbide


Drag Knife Cut Style

Carbide bits have a small, sharp point for cutting precise, thin lines. They’re spring loaded to apply constant pressure to the tip, making them good for cutting thinner materials than steel bits.

	Shank Dia.	Overall Lg.	No. of Flutes	For Tool Type	For Use On		Each
Drag Knife Cut Style







	Straight Flutes

	1/64"	1/32"	45°, 60°	1/4"	2 1/4"	1	CNC Machine	Fabric, Leather, Paper, Rubber, Vinyl Plastic	0000000	0000000

Replacement Router Bit Blades

	Cut Radius	Lg. of Cut	Cut Angle	Shank Dia.	Overall Lg.
Uncoated Carbide


1/64"	1/32"	45°	1/16"	7/8"	0000000	000000
1/64"	1/32"	60°	1/16"	7/8"	0000000	00000

Uncoated Steel


Drag Knife Cut Style

Steel bits use a utility-knife blade; the larger blade cuts through thicker materials than carbide bits.

	Overall Lg.	No. of Flutes	Heat Treatment	For Tool Type	For Use On		Each
Drag Knife Cut Style







	Straight Flutes

	1/16"	1/16"	1/4"	3 1/4"	1	Hardened	CNC Machine	Fabric, Leather, Paper, Rubber, Vinyl Plastic	0000000	0000000


	1/16"	1/16"	1/2"	4 1/2"	1	Hardened	CNC Machine	Fabric, Leather, Paper, Rubber, Vinyl Plastic	0000000	000000
	1/8"	1/4"	1/4"	3 1/2"	1	Hardened	CNC Machine	Fabric, Leather, Paper, Rubber, Vinyl Plastic	0000000	000000
	1/8"	1/4"	1/2"	4 3/8"	1	Hardened	CNC Machine	Fabric, Leather, Paper, Rubber, Vinyl Plastic	0000000	000000
	4 1/4"	1/2"	1/2"	4 3/4"	1	Hardened	CNC Machine	Fabric, Leather, Paper, Rubber, Vinyl Plastic	0000000	000000

Replacement Utility Knife Blades

	Blade	Pkg. of 5	Pkg. of 100
Steel


2 3/8"	3/4"	0.025"	Straight	00000000	00000	00000000	000000

Straight and Spiral Router Bits for Wood, Particle Board, and Plywood

Square Cut Style

Create square slots, pockets, and edges in wood. These router bits are plunge cutting, letting you cut directly into the workpiece from above. They do not have a pilot, so guide your router along a straight edge when hand routing to make accurate cuts.

Uncoated Carbide

Square Cut

Style—Plunge-Cut,

Spiral Flute

Spiral Flute—Bits with spiral flutes leave a smoother finish than straight-flute bits and make plunge cuts more easily. They're made of solid carbide for longer tool life and faster cutting speeds than high-speed steel.

Upward and Downward Chip Removal—Spiral-flute bits with upward and downward chip removal are also known as compression bits. Acting similar to scissors, they move chips away from the top and bottom edges of the cut for a smooth finish on both.

1 Flute—Choose a bit with one flute for a faster cut; bits with more flutes produce a smoother finish.

	Overall Lg.	No. of Flutes	For Tool Type	For Use On		Each
Square Cut Style—Plunge-Cut







	Spiral Flutes with Upward and Downward Chip Removal

	1/8"	3/8"	1/4"	2 1/2"	1	CNC Machine	Wood, Particleboard, Plywood	0000000	000000

Trimming Router Bits

Cut layers of material flush to one another or make cuts along a template.

Uncoated Carbide

Flush-Trimming Cut

Style (Bottom Pilot)

Flush-Trimming

Cut Style (Bottom

Pilot), Straight

Flutes

Use carbide bits for longer tool life and faster cutting speeds than high-speed steel.

Bottom Pilot—Bottom-pilot bits trim material from an upper layer of the workpiece so that it is flush with the layer below. In addition to flush trimming, they can be used to cut along a template placed below the workpiece.

Straight Flutes—Bits with straight flutes are for general purpose use. They quickly remove material, leaving a rough finish.

Solid—Solid pilots guide the bit while routing. They are more durable than ball-bearing bits.

1 Flute—Choose a bit with one flute for a faster cut; bits with more flutes produce a smoother finish.

Pilot Location—Pilot location describes the position of the pilot when the bit is used for hand routing. The pilot location is reversed when using the bit with a router table.

	Overall Lg.	Router Bit Pilot Type	No. of Flutes	For Tool Type	For Use On		Each
Flush-Trimming Cut Style (Bottom Pilot)







	Straight Flutes

	1/4"	1/4"	1/4"	1 1/2"	Solid	1	Hand Router, Router Table	Laminate	00000000	000000


	1/4"	3/8"	1/4"	2"	Solid	1	Hand Router, Router Table	Laminate	00000000	00000

Uncoated Micrograin Carbide

Flush-Trimming Cut

Style (Bottom Pilot)

Bottom Pilot with

Overhang Cutoff Edge

Micrograin carbide bits provide superior wear resistance, long tool life, and a cleaner finish than bits made of other materials.

Use carbide bits for longer tool life and faster cutting speeds than high-speed steel.

Straight Flutes—Bits with straight flutes are for general purpose use. They quickly remove material, leaving a rough finish.

Ball Bearing—Ball-bearing pilots guide the bit for accurate cuts and produce less friction than solid pilots for smoother operation.

1 Flute—Choose a bit with one flute for a faster cut; bits with more flutes produce a smoother finish.

Overhang Cutoff Edge—Bits with an overhang cutoff edge remove most of the excess material from the edge of workpieces such as countertops and sink cutouts, but they leave some material leftover for precise trimming after the installation. This process minimizes the risk of chipping laminate during installation and produces a clean, professional finish.

Pilot Location—Pilot location describes the position of the pilot when the bit is used for hand routing. The pilot location is reversed when using the bit with a router table.

	Overall Lg.	Router Bit Pilot Type	Ball Bearing Pilot Dia.	No. of Flutes	For Tool Type	For Use On	Features		Each
Flush-Trimming Cut Style (Bottom Pilot)







	Straight Flutes

	3/8"	1/2"	1/4"	2 7/16"	Ball Bearing	3/4"	1	Hand Router, Router Table, CNC Machine	Wood, Particleboard, Plywood, Laminate	Overhang Cutoff Edge	0000000	000000

	Blade				Pkg. of 5		Pkg. of 100
	Lg.	Wd.	Thk.	Edge		Pkg.		Pkg.
Steel



		2 3/8"	3/4"	0.025"	Straight	00000000	00000	00000000	000000