58mm Long Drill Bits | McMaster-Carr

Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these bits can last 50% longer than uncoated bits.

					Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type		Each
Short Length







				Black Oxide

				4.3	0.1693"	58	10.7	Round	4.3 mm	Split	28255A87	00000


				4.4	0.1732"	58	11	Round	4.4 mm	Split	28255A88	0000
				4.5	0.1772"	58	14.9	Round	4.5 mm	Split	28255A37	0000
				4.6	0.1811"	58	11.5	Round	4.6 mm	Split	28255A89	0000

Fast-Cut Carbide Barrel End Mills

Barrel Cut Style

4 Flutes

Variable spacing between the flutes reduces vibration, allowing these end mills to provide fast cuts, smooth finishes, and long tool life on hard materials. Also known as barrel cutters, these end mills create the smooth finish of a ball end mill, but with a tapered cutting surface that removes more material with each pass. They're ideal for 5-axis machining where you need to cut from many angles. Plus, compared to ball end mills, they move farther between overlapping passes (stepover), which decreases machining time and tool wear, so they’ll last longer. All are center cutting, allowing plunge cuts into a surface.

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. A titanium aluminum silicon nitride (TiAlSiN) coating makes them extremely resistant to wear and diffusion because they have especially high hardness, even at high temperatures.

End mills with fewer flutes provide better chip clearance for high-volume, high-speed plunge, slotting, and roughing cuts; end mills with more flutes provide a finer finish and operate with less vibration when run at high speeds.

	Mill, mm
	Dia.	Dia. Tolerance	Max. Taper Dia., mm	Shank Dia., mm	Lg. of Cut, mm	Overall Lg., mm	Flute Spacing	Helix Angle	For Use On	End Mill Type	Cut Style		Each
Titanium Aluminum Silicon Nitride (TiAlSiN)-Coated Carbide







				4 Flutes

				1	-0.01 to 0.01	3	6	9.5	58	Variable	10° to 43°	Brass, Bronze, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Center Cutting	Barrel	8410N11	0000000


				1.5	-0.01 to 0.01	3	6	8	58	Variable	10° to 43°	Brass, Bronze, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Center Cutting	Barrel	8410N12	00000

Fast-Cut Carbide Barrel End Mills for Aluminum, Brass, and Bronze

Barrel Cut Style

3 Flutes

A titanium diboride (TiB2) coating reduces friction when working with nonferrous metals, so you can use these end mills to cut soft metals like aluminum, brass, and bronze. Variable spacing between the flutes reduces vibration, allowing these end mills to provide fast cuts, smooth finishes, and long tool life. Also known as barrel cutters, these end mills create the smooth finish of a ball end mill, but with a tapered cutting surface that removes more material with each pass. They're ideal for 5-axis machining where you need to cut from many angles. Plus, compared to ball end mills, they move farther between overlapping passes (stepover), which decreases machining time and tool wear, so they’ll last longer. All are center cutting, allowing plunge cuts into a surface.

3 Flutes—End mills with three flutes provide better chip clearance for high-volume, high-speed plunge, slotting, and roughing cuts.

	Mill, mm
	Dia.	Dia. Tolerance	Max. Taper Dia., mm	Shank Dia., mm	Lg. of Cut, mm	Overall Lg., mm	Flute Spacing	Helix Angle	For Use On	End Mill Type	Cut Style		Each
Titanium Diboride (TiB2)-Coated Carbide







				3 Flutes

				1	-0.01 to 0.01	3	6	9	58	Variable	15° to 55°	Aluminum, Brass, Bronze	Center Cutting	Barrel	8202N101	000000


				1.5	-0.01 to 0.01	3	6	8	58	Variable	15° to 55°	Aluminum, Brass, Bronze	Center Cutting	Barrel	8202N102	00000