109mm 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.

Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated and oxide-coated bits, especially on tough materials like hardened steel and nickel.

					Shank				Each
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type		1-11	12-Up
Jobbers' Length







				Black Oxide

				6.8	0.2677"	109	55.4	Round	6.8 mm	Standard	2958A114	00000	00000


				7.0	0.2756"	109	55	Round	7 mm	Standard	2958A116	0000	0000
				7.2	0.2835"	109	54.6	Round	7.2 mm	Standard	2958A118	0000	0000
				7.3	0.2874"	109	54.4	Round	7.3 mm	Standard	2958A119	0000	0000
				7.4	0.2913"	109	54.2	Round	7.4 mm	Standard	2958A121	0000	0000
				7.5	0.2953"	109	54	Round	7.5 mm	Standard	2958A122	0000	0000




						Titanium Nitride (TiN) Coated

						6.8	0.2677"	109	55.4	Round	6.8 mm	Standard	8950A59	0000	0000


						7.0	0.2756"	109	55	Round	7 mm	Standard	8950A21	00000	0000
						7.5	0.2953"	109	54	Round	7.5 mm	Standard	8950A61	0000	0000

Cobalt Steel Drill Bits


Jobbers' Length Round Shank	Split

Tough and wear resistant, cobalt steel bits last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without being damaged on hard materials, such as nickel.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated and oxide-coated bits, especially on tough materials like hardened steel and nickel.

Titanium Aluminum Nitride (TiAlN) Coated—The hardest and most wear-resistant coating, especially at high temperatures. These bits are best for hard and abrasive materials, such as iron, titanium, and fiberglass.

Gold Oxide—Like black oxide, this finish adds wear resistance and reduces friction for improved chip flow. Because it’s less prone to flaking off, it offers better rust protection when bits aren't in use.

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







				Titanium Nitride (TiN) Coated

				6.8	0.2677"	109	69	Round	6.8 mm	Split	5058N36	000000


				6.9	0.2717"	109	69	Round	6.9 mm	Split	5058N136	00000
				7.5	0.2953"	109	69	Round	7.5 mm	Split	5058N37	00000




						Titanium Aluminum Nitride (TiAlN) Coated

						6.8	0.2677"	109	69	Round	6.8 mm	Split	2753A239	00000


						6.9	0.2717"	109	69	Round	6.9 mm	Split	5058N147	00000
						7.0	0.2756"	109	58.5	Round	7 mm	Split	2753A175	00000
						7.5	0.2953"	109	69	Round	7.5 mm	Split	2753A241	00000




								Gold Oxide

								6.8	0.2677"	109	55.4	Round	6.8 mm	Split	29355A115	0000


								6.9	0.2717"	109	55.2	Round	6.9 mm	Split	29355A116	0000
								7.0	0.2756"	109	55	Round	7 mm	Split	29355A117	0000
								7.5	0.2953"	109	54	Round	7.5 mm	Split	29355A124	00000

Chip-Clearing Cobalt Steel Drill Bits

Jobbers' Length

Parabolic Flute

Round Shank

Split

Avoid clogs and dissipate heat with cobalt bits that last at least twice as long as high-speed steel. The flutes clear chips to improve coolant flow and prevent damage to the bit and the hole. They also speed up drilling since you don't have to stop to clear the bit manually.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

Uncoated—Polished to eject chips, these are also known as bright finish bits.

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







				Uncoated

				6.8	0.2677"	109	67	Parabolic	Round	6.8	Split	2771N768	000000


				7.1	0.2795"	109	67	Parabolic	Round	7.1	Split	2771N769	00000
				7.2	0.2835"	109	67	Parabolic	Round	7.2	Split	2771N771	00000
				7.3	0.2874"	109	67	Parabolic	Round	7.3	Split	2771N772	00000
				7.4	0.2913"	109	67	Parabolic	Round	7.4	Split	2771N773	00000

High-Speed Steel Drill Bits for Plastic

The precision-ground, 60° point penetrates gradually to prevent cracking and chipping. It also reduces heat that can deform the material. Use these bits for drilling into acrylic, laminate, and other plastics. They're made of wear-resistant high-speed steel.

Jobbers' Length About Jobbers' Length

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



		7.0	0.2756"	109	72	Round	7	60°	Standard	27465A419	000000


		7.5	0.2953"	109	77	Round	7.5	60°	Standard	27465A421	00000

Chip-Clearing High-Speed Steel Drill Bits


Jobbers' Length Parabolic Flute Round Shank	Split

With flutes that lift chips out of the hole, you don't have to stop drilling to clear these bits manually. They improve coolant flow to dissipate heat and prevent clogs that can damage the bit and ruin the hole. High-speed steel is good for general purpose drilling in most metals.

Parabolic Flute—A U-shaped groove on the flutes cuts faster and clears chips more quickly than high-helix bits, so these are better for drilling deeper holes.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated and oxide-coated bits, especially on tough materials like hardened steel and nickel.

Uncoated—The most economical option, uncoated bits perform best when used on low-carbon steel and aluminum. Polished to reduce friction, they're also known as bright finish bits.

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







				Titanium Nitride (TiN) Coated

				6.8	0.2677"	109	69	Parabolic	Round	6.8	Split	7333N29	000000


				7.0	0.2756"	109	69	Parabolic	Round	7	Split	7333N31	00000
				7.5	0.2953"	109	69	Parabolic	Round	7.5	Split	7333N32	00000




						Uncoated

						6.8	0.2677"	109	55.4	Parabolic	Round	6.8	Split	2754A33	0000


						7.0	0.2756"	109	55	Parabolic	Round	7	Split	2754A34	0000
						7.5	0.2953"	109	54	Parabolic	Round	7.5	Split	2754A35	0000

Chip-Clearing Cobalt Steel Drill Bits for Nickel and Stainless Steel

Jobbers' Length

Parabolic Flute

Round Shank

Split

Excellent for challenging metals such as stainless steel and nickel alloys, these bits cut aggressively and evacuate chips quickly. The grooved flutes prevent clogs and improve coolant flow to dissipate heat that can damage the bit or your material. Bits are made of tough and wear-resistant cobalt steel.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

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







				Titanium Aluminum Nitride (TiAlN) Coated

				7.0	0.2756"	109	69	Parabolic	Round	7	Split	3020A54	000000

Left-Hand High-Speed Steel Drill Bits


Jobbers' Length Round Shank	Standard

With flutes that spiral in the opposite direction of other bits, these are primarily used to remove stripped screws. Choose a bit that’s slightly smaller than the diameter of the screw’s head. Set your power tool to rotate in reverse. Slowly drill in the center of the screw head, maintaining constant pressure. As the bit penetrates, it will catch onto the screw and reverse it out of the hole. If the screw is badly stripped, you might need to punch a starter hole. Also known as reverse-flute bits. High-speed steel is the versatile choice for drilling most metals.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

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				Each
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type		1-9	10-Up
Jobbers' Length







				Black Oxide

				7.0	0.2756"	109	59.9	Round	7 mm	Standard	29855A65	000000	000000

Fast-Cut Carbide Barrel End Mills

Barrel Cut Style

6 Flutes

8 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







				6 Flutes

				2	-0.01 to 0.01	3	16	15	109	Variable	10° to 43°	Brass, Bronze, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Center Cutting	Barrel	8410N28	0000000


				2	-0.01 to 0.01	5	16	31	109	Variable	10° to 43°	Brass, Bronze, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Center Cutting	Barrel	8410N21	000000




						8 Flutes

						3	-0.01 to 0.01	5	16	18.5	109	Variable	10° to 43°	Brass, Bronze, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Center Cutting	Barrel	8410N29	000000


						3	-0.01 to 0.01	5	16	27.5	109	Variable	10° to 43°	Brass, Bronze, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Center Cutting	Barrel	8410N22	000000
						4	-0.01 to 0.01	5	16	21	109	Variable	10° to 43°	Brass, Bronze, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Center Cutting	Barrel	8410N24	000000
						4	-0.01 to 0.01	5	16	24	109	Variable	10° to 43°	Brass, Bronze, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Center Cutting	Barrel	8410N23	000000
						4	-0.01 to 0.01	5	16	28.5	109	Variable	10° to 43°	Brass, Bronze, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Center Cutting	Barrel	8410N26	000000
						4	-0.01 to 0.01	8	16	18.5	109	Variable	10° to 43°	Brass, Bronze, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Center Cutting	Barrel	8410N25	000000

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

Barrel Cut Style

4 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.

4 Flutes—End mills with four 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 Diboride (TiB2)-Coated Carbide







				4 Flutes

				2	-0.01 to 0.01	3	16	15	109	Variable	15° to 55°	Aluminum, Brass, Bronze	Center Cutting	Barrel	8202N118	0000000


				2	-0.01 to 0.01	5	16	31	109	Variable	15° to 55°	Aluminum, Brass, Bronze	Center Cutting	Barrel	8202N111	000000
				3	-0.01 to 0.01	5	16	18	109	Variable	15° to 55°	Aluminum, Brass, Bronze	Center Cutting	Barrel	8202N119	000000
				3	-0.01 to 0.01	5	16	19	109	Variable	15° to 55°	Aluminum, Brass, Bronze	Center Cutting	Barrel	8202N117	000000
				3	-0.01 to 0.01	5	16	27	109	Variable	15° to 55°	Aluminum, Brass, Bronze	Center Cutting	Barrel	8202N112	000000
				4	-0.01 to 0.01	5	16	21	109	Variable	15° to 55°	Aluminum, Brass, Bronze	Center Cutting	Barrel	8202N114	000000
				4	-0.01 to 0.01	5	16	24	109	Variable	15° to 55°	Aluminum, Brass, Bronze	Center Cutting	Barrel	8202N113	000000
				4	-0.01 to 0.01	5	16	28	109	Variable	15° to 55°	Aluminum, Brass, Bronze	Center Cutting	Barrel	8202N116	000000
				4	-0.01 to 0.01	8	16	18	109	Variable	15° to 55°	Aluminum, Brass, Bronze	Center Cutting	Barrel	8202N115	000000