Four-Flute End Mills | McMaster-Carr

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	Number of Flutes Number of Flutes	Show

	4

	Number of Flutes Number of Flutes	Hide


1	2

3	4

5	6

7	8

9	11

	System of Measurement System of Measurement

Inch

Metric

	Mill Diameter Mill Diameter

	Cut Style Cut Style


Square	Ball

Tapered	Rounded-Edge Square

Chamfer	Corner Rounding

Threading	Dovetail

Drill/Mill	Undercutting

Convex Radius	Double Chamfer

Concave Radius

	For Use On For Use On

	Material Material

Carbide

High-Speed Steel

Cobalt Steel

	Finish Finish

Aluminum Titanium Nitride
(AlTiN) Coated

Diamond Coated

Diamondlike Carbon (DLC)
Coated

Titanium Aluminum Nitride
(TiAlN) Coated

Titanium Aluminum Silicon
Nitride (TiAISiN) Coated

Titanium Carbonitride (TiCN)
Coated

Titanium Nitride (TiN) Coated

Uncoated

	Length of Cut Length of Cut

	Shank Diameter Shank Diameter

	Number of Milling Ends Number of Milling Ends

	1
	2

	Overall Length Overall Length

	End Mill Type End Mill Type

Center Cutting

Noncenter Cutting

	Individual/Set Individual/Set


Individual	Set

	Flute Spacing Flute Spacing

Equal

Variable

	Flute Type Flute Type

Spiral

Straight

Intersecting

	Shank Type Shank Type

	Round

	Helix Angle Helix Angle

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

RoHS Compliant

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

DFARS Specialty Metals
COTS-Exempt

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

REACH Compliant

	Corner Cut Radius Corner Cut Radius

	Taper Angle per Side Taper Angle per Side

	Cut Radius Cut Radius

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End Mills and Milling Cutters

Carbide Square End Mills

Made of solid carbide, these end mills are harder, stronger, and more wear resistant than high-speed steel and cobalt steel for the longest life and best finish on hard material. Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent the end mill from breaking.

High-Speed Steel Square End Mills

Use these end mills for general purpose milling in most material, such as aluminum, brass, bronze, iron, and steel.

Cobalt Steel Square End Mills

With better heat and wear resistance than high-speed steel, cobalt steel end mills can run at higher speeds and provide better performance on hard material.

Carbide Ball End Mills

High-Speed Steel Ball End Mills

Use these end mills for general purpose milling in most material, such as aluminum, brass, bronze, iron, and steel.

Cobalt Steel Ball End Mills with Two Milling Ends

With better heat and wear resistance than high-speed steel, these cobalt steel end mills can run at higher speeds and provide better performance on hard material, such as iron, hardened steel, titanium, and tool steel. When one end wears out, turn the tool around for a sharp edge.

High-Speed Steel Tapered Square End Mills

Use these end mills for general purpose work in most material, such as aluminum, brass, bronze, iron, and steel. Also known as taper degree end mills, they're often used to machine angled slots in dies and molds.

Carbide Tapered Square End Mills

Made of solid carbide, these end mills are harder, stronger, and more wear resistant than high-speed steel for the longest life and best finish on hard material. Also known as taper degree end mills, they're often used to machine angled slots in dies and molds.

Carbide Rounded-Edge Square End Mills

Cobalt Steel Rounded-Edge Square End Mills

Made of cobalt steel, these end mills have good heat and wear resistance, so they can run at high speeds in hard material. Often used for slotting and pocketing cuts in mold and die making, they have a 90° profile and rounded corners, which reduce flute breakage and chipping.

Chamfer End Mills

These end mills have a single chamfer for creating beveled and angled cuts.

Double-Chamfer End Mills

Make top and bottom chamfers without having to flip the workpiece.

Carbide Corner-Rounding End Mills

High-Speed Steel Corner-Rounding End Mills

Use these end mills for general purpose work in most material, such as aluminum, brass, bronze, iron, and steel. They have scooped corners for rounding the sharp edges of your workpiece.

Cobalt Steel Corner-Rounding End Mills

With better heat and wear resistance than high-speed steel, these cobalt steel end mills run at higher speeds and provide better performance on hard material. They have scooped corners for rounding the sharp edges of your workpiece.

Carbide Dovetail End Mills for Dovetail Milling Vises

Cut dovetail notches into your workpiece for use with our Dovetail Milling-Machine Vises.

Carbide Drill/Mill End Mills

Made of solid carbide, these end mills are harder, stronger, and more wear resistant than cobalt steel for the longest life and best finish on hard material. A 90° pointed tip allows them to be used for drilling as well as for slotting, profiling, chamfering, and spotting cuts.

Undercutting End Mills

A fine-point tip cuts lettering and numbering and makes designs in a variety of metals and composites, such as aluminum, fiberglass, and titanium.

High-Speed Steel Convex-Radius End Mills

Use these end mills for general purpose work in most material, such as aluminum, brass, bronze, iron, and steel. With curved, side-cutting teeth, they create hollow, inward-curving grooves.

Concave-Radius End Mills

A scalloped profile creates rounded, outward-curving edges.

End Mill and Milling Cutter Sets

Square End Mill Sets

These end mills have a 90° profile for creating square slots, pockets, and edges.

Drill/Mill End Mill Sets

These multifunction tools have a 90° pointed tip that allows them to be used for drilling as well as for slotting, profiling, and chamfering cuts.

Ball End Mill Sets

Good for rounded slots, sloping cuts, and contours, ball end mills have a rounded cutting edge.

Thread Mills

Cut a range of thread sizes with a single tool. These thread mills can also produce both right-hand and left-hand threads.