2 1/2" End Mills | McMaster-Carr

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	Cut Style Cut Style


Square	Chamfer

Face Milling	Slitting

Flat Surface

	System of Measurement System of Measurement

Inch

	Mill Diameter Mill Diameter	Show

2 1/2"

	Mill Diameter Mill Diameter	Hide

	Shank Type Shank Type


Round	R8 Taper

	For Use On For Use On

	Overall Length Overall Length

5 3/4"

5 7/8"

	Mill Thickness Mill Thickness

	Material Material

Carbide

High-Speed Steel

Steel

	Head Diameter Head Diameter

2 1/2"

	Individual/Set Individual/Set

	Individual

	Shank Diameter Shank Diameter

3/4"

	Arbor Hole Diameter Arbor Hole Diameter

7/8"

	Finish Finish

Black Oxide

Uncoated

	Number of Milling Ends Number of Milling Ends

	1

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Number of Inserts Required Number of Inserts Required

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	For Tool Bit Shank Height For Tool Bit Shank Height

5/16"

	For Tool Bit Shank Width For Tool Bit Shank Width

5/16"

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Keyway Width Keyway Width

0.125"

	Number of Teeth Number of Teeth

	Helix Angle Helix Angle

30°

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18 Products

Replaceable Carbide-Insert End Mills for Manual Milling Machines

Square Cut Style

Use these tools with low-horsepower, manual milling machines. They have clamps for holding inserts that do not have a mounting hole. Replaceable carbide-insert end mills reduce waste and cost in high-volume jobs—when the cutting edges dull, replace the carbide inserts instead of the entire tool. End mills have a square cut style for milling square slots, pockets, and edges. All are noncenter-cutting for operations where the sides of the teeth do most of the work, such as shoulder milling, contouring, and finishing. They cannot be used for plunge cuts.

R8-shank end mills have internal threads on the tapered end for connecting to a drawbar.

Carbide inserts have a wear-resistant titanium-nitride (TiN) coating.

End Mills

End Mill Body Shown with Inserts (Sold Separately)

	Shank Thread
Mill Dia.	Gender	Size	Overall Lg.	Cut Style	Material	Number of Inserts Required	End Mill Type		Each
R8 Taper Shank
2 1/2"	Female	7/16"-20	5 7/8"	Square	Black-Oxide Steel	5	Noncenter Cutting	0000000	0000000

Replacement Hold-Down Clamp	0000000	Each	00000
Replacement Clamp Screws	0000000	Each	000

Carbide Inserts

Carbide Insert

Titanium Nitride (TiN) Coated
Tip Radius	Insert Code	Insert Size	Thick.	For Use On		Each
1/64"	TPG-321	3/8"	1/8"	Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	00000000	00000
1/32"	TPG-322	3/8"	1/8"	Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	00000000	0000
3/64"	TPG-323	3/8"	1/8"	Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	00000000	0000
1/16"	TPG-324	3/8"	1/8"	Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	00000000	0000

Outside Chamfer End Mills for Pipes, Tubes, and Rods

Mill an angled edge to the entire outside diameter of pipe, tubes, and rods in a single pass with more speed and precision than a handheld scraper. These end mills deburr pipe and tube for butt welds and shape rods for sliding into housings and holes. They attach to screw machines, lathes, and drill presses and can be set up to repeat cuts for multiple pipes. Staggered cutting edges reduce vibration, resulting in a smooth finish. They have teeth that distribute cutting force and extend the life of the tool. Made of high-speed steel, they work with a variety of metals. Attach to your machine with a shank (sold separately).

End Mills

End Mill

		Mill
For OD	For Pipe Size	Dia.	Thick.	Thread Size	For Use On		Each
Uncoated—30° Cutting Angle
7/8"-2"	1/2, 3/4, 1, 1 1/4, 1 1/2	2 1/2"	3"	1"-14	Aluminum, Brass, Bronze, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel	0000000	0000000
Uncoated—45° Cutting Angle
7/8"-2"	1/2, 3/4, 1, 1 1/4, 1 1/2	2 1/2"	2 1/2"	1"-14	Aluminum, Brass, Bronze, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel	0000000	000000

Shanks

Shank

Shank
Dia.	Lg.	Shoulder Dia.	Overall Lg.		Each
1"-14 Thread
1"	2"	1 3/16"	2 3/4"	0000000	000000

Fly Cutters

Flat-Surface Cut Style

Fly cutters clamp onto tool blanks (sold separately) to machine flat surfaces. As the cutter rotates, the tool blank creates a wide, shallow cut on the face of the workpiece. An alternative to face milling cutters for intermittent and light duty use, these cutters allow you to remove and hand-sharpen the tool blank when it becomes worn.

For technical drawings and 3-D models, click on a part number.

		Shank Thread			For Tool Bit Shank
Mill Dia.	Shank Dia.	Gender	Size	Overall Lg.	Wd.	Shape	Ht.	Head Dia.	Material	Heat Treatment		Each
Straight Shank
2 1/2"	3/4"	__	__	3"	5/16"	Square	5/16"	2 1/2"	Black-Oxide Steel	Hardened	0000000	000000
R8 Taper Shank
2 1/2"	__	Female	7/16"-20	5 3/4"	5/16"	Square	5/16"	2 1/2"	Black-Oxide Steel	Hardened	0000000	00000

Face Milling Cutters

Face-Milling Cut Style

Also known as shell cutters, these high-speed steel cutters are good for face and side milling. They have a large mill diameter for removing a large amount of material per pass. Compared to fly cutters, they’re more rigid, which makes for a better finish. Use with an R8 shank arbor (sold separately).

For technical drawings and 3-D models, click on a part number.

Mill
Thick.	Dia.	Number of Teeth	Arbor Hole Dia.	Helix Angle	Material	For Use On		Each
Uncoated
1 5/8"	2 1/2"	10	1"	30°	High-Speed Steel	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	0000000

High-Speed Steel Slitting Saws

Slitting Cut Style

These general purpose saws are good for cutoff, slitting, and slotting applications in a wide range of materials, including aluminum, iron, and steel. Use with an arbor (sold separately).

Saws with 1 1/4"-2 1/2" and 3"-8" mill dia. are also known as plain metal slitting saws.

For technical drawings and 3-D models, click on a part number.

Mill
Thick.	Dia.	Number of Teeth	Arbor Hole Dia.	Keyway Wd.	Material	For Use On		Each
1/32"	2 1/2"	28	7/8"	0.125"	High-Speed Steel	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000
1/8"	2 1/2"	28	7/8"	0.125"	High-Speed Steel	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	00000

Carbide Slitting Saws

Slitting Cut Style

Made of solid carbide, these saws are harder, stronger, and more wear resistant than high-speed steel for the longest life and best finish on hard material. Use them for cutoff, slitting, and slotting applications. Use with an arbor (sold separately).

For technical drawings and 3-D models, click on a part number.

Mill
Thick.	Dia.	Number of Teeth	Arbor Hole Dia.	Material	For Use On		Each
1/32"	2 1/2"	48	1"	Carbide	Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	00000000	0000000
1/16"	2 1/2"	48	1"	Carbide	Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	00000000	000000

Slitting Saws with Side Teeth

Slitting Cut Style

With peripheral and side teeth, these saws remove chips for a consistent cutting width. Use with an arbor (sold separately).

For technical drawings and 3-D models, click on a part number.

Mill
Thick.	Dia.	Number of Teeth	Arbor Hole Dia.	Keyway Wd.	Material	For Use On		Each
1/16"	2 1/2"	28	7/8"	0.125"	High-Speed Steel	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000