75mm Long Drill Bits | McMaster-Carr

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47 Products

Drill Bits

Cut holes in a variety of metals, from the softest aluminum to the hardest steel.

High-Speed Steel Jobbers' Length

Round Shank

Standard

Our basic drill bit material is also the most versatile. These jobbers' 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.

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.

Round Shank—The most common shank type. These fit in the chuck of drill presses and portable drills.

Standard Point—Good for general purpose drilling. You’ll need to make a pilot hole to center the bit.

						Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Flute Type	Type	Size, mm	Drill Bit Point Type	No. of Flutes	Specs. Met	Pkg. Qty.		Pkg.
Black Oxide





				Metric
				4.0	0.1575"	75	35	Spiral	Round	4	Standard	2	DIN 338	1	0000000	00000
				4.0	0.1575"	75	35	Spiral	Round	4	Standard	2	DIN 338	10	00000000	00000
				4.1	0.1614"	75	34.8	Spiral	Round	4.1	Standard	2	DIN 338	1	0000000	0000
				4.2	0.1654"	75	34.6	Spiral	Round	4.2	Standard	2	DIN 338	1	0000000	0000
				4.2	0.1654"	75	34.6	Spiral	Round	4.2	Standard	2	DIN 338	10	00000000	00000

				Titanium Nitride (TiN) Coated





								Metric
								4.0	0.1575"	75	37	Spiral	Round	4	Standard	2	DIN 338	1	0000000	0000
								4.1	0.1614"	75	34.8	Spiral	Round	4.1	Standard	2	DIN 338	1	0000000	0000
								4.2	0.1654"	75	36.7	Spiral	Round	4.2	Standard	2	DIN 338	1	0000000	0000

Cobalt Steel Jobbers' Length


Round Shank	Split

The toughness and wear resistance of cobalt steel in a length that's rigid enough for most applications. Cobalt lasts at least twice as long as high-speed steel. It can also run up to 25% faster at higher temperatures without damaging the bit on hard materials such as nickel.

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.

Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated 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.

Round Shank—The most common shank type. These fit in the chuck of drill presses and portable drills.

Split Point—Starts cutting on contact so you don’t need a pilot hole. The point also keeps the bit centered for straight and accurate holes, even with a portable drill.

						Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Flute Type	Type	Size, mm	Drill Bit Point Type	No. of Flutes	Specs. Met		Each
Gold Oxide





				Metric
				3.8	0.1496"	75	35.4	Spiral	Round	3.8	Split	2	NAS907 Type J	00000000	00000
				4.0	0.1575"	75	35	Spiral	Round	4	Split	2	NAS907 Type J	00000000	0000
				4.1	0.1614"	75	34.8	Spiral	Round	4.1	Split	2	NAS907 Type J	00000000	0000
				4.2	0.1654"	75	34.6	Spiral	Round	4.2	Split	2	NAS907 Type J	00000000	0000

				Titanium Nitride (TiN) Coated





								Metric
								3.8	0.1496"	75	43	Spiral	Round	3.8	Split	2	DIN 338	00000000	0000
								4.0	0.1575"	75	42.9	Spiral	Round	4	Split	2	DIN 338	0000000	0000
								4.1	0.1614"	75	43	Spiral	Round	4.1	Split	2	DIN 338	00000000	0000
								4.2	0.1654"	75	42.9	Spiral	Round	4.2	Split	2	DIN 338	0000000	0000

								Titanium Aluminum Nitride (TiAlN) Coated





												Metric
												4.0	0.1575"	75	37	Spiral	Round	4	Split	2	DIN 338	00000000	00000
												4.2	0.1654"	75	36.7	Spiral	Round	4.2	Split	2	DIN 338	00000000	00000

Cobalt Steel Short Length

Round Shank

Split

Combine the toughness and wear resistance of cobalt steel with a short length for drilling the straightest holes. These last twice as long as high-speed steel and can run up to 25% faster at higher temperatures without damaging the bit on hard metals like nickel. Also known as screw-machine and stub-length bits, they fit in tight spaces where longer bits can't.

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

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

Round Shank—The most common shank type. These fit in the chuck of drill presses and portable drills.

Split Point—Starts cutting on contact so you don’t need a pilot hole. The point also keeps the bit centered for straight and accurate holes, even with a portable drill.

						Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Flute Type	Type	Size, mm	Drill Bit Point Type	No. of Flutes	Specs. Met		Each
Titanium Nitride (TiN) Coated





				Metric
				7.0	0.2756"	75	20.1	Spiral	Round	7	Split	2	DIN 1897	00000000	000000

				Uncoated





								Metric
								7.0	0.2756"	75	20.1	Spiral	Round	7	Split	2	DIN 1897	00000000	0000

Carbide Short Length

Round Shank

Our shortest and most rigid bits are also the hardest and most wear resistant. They stay sharp at high temperatures and faster speeds for the straightest holes in hard and difficult-to-machine materials. Used in manufacturing and CNC drilling, they last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so these bits require a rigid machine tool holder to prevent breakage and should not be used in hand drilling applications.

Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated bits, especially on materials like hardened steel, iron, and stainless steel.

Titanium Aluminum Nitride (TiAlN) Coated—No drill bits last longer. These are the best for high-speed, high-temperature drilling of very hard and abrasive materials, including titanium and fiberglass.

Uncoated—Excellent for a range of metals, they perform best when used on steel, aluminum, brass, and bronze.

Round Shank—The most common shank type fits in a drill press chuck.

Four-Facet Point—The most accurate point style, it centers the bit without a pilot hole and keeps the bit stable while drilling hard metals.

						Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Flute Type	Type	Size, mm	Drill Bit Point Type	No. of Flutes		Each
Titanium Nitride (TiN) Coated





				Metric
				10.0	0.3937"	75	32	Spiral	Round	10	Four Facet	2	000000000	000000
				10.5	0.4134"	75	32	Spiral	Round	10.5	Four Facet	2	000000000	00000
				11.0	0.4331"	75	32	Spiral	Round	11	Four Facet	2	000000000	00000
				11.5	0.4528"	75	32	Spiral	Round	11.5	Four Facet	2	000000000	00000
				12.0	0.4724"	75	32	Spiral	Round	12	Four Facet	2	000000000	00000
				12.5	0.4921"	75	32	Spiral	Round	12.5	Four Facet	2	000000000	00000

				Titanium Aluminum Nitride (TiAlN) Coated





								Metric
								9.0	0.3543"	75	32	Spiral	Round	9	Four Facet	2	00000000	00000
								10.0	0.3937"	75	32	Spiral	Round	10	Four Facet	2	00000000	00000
								10.5	0.4134"	75	32	Spiral	Round	10.5	Four Facet	2	00000000	00000
								12.0	0.4724"	75	32	Spiral	Round	12	Four Facet	2	00000000	00000

								Uncoated





												Metric
												10.0	0.3937"	75	32	Spiral	Round	10	Four Facet	2	00000000	00000
												12.0	0.4724"	75	32	Spiral	Round	12	Four Facet	2	00000000	00000
												12.5	0.4921"	75	32	Spiral	Round	12.5	Four Facet	2	00000000	00000

Chip-Clearing Drill Bits

With flutes that lift chips out of the hole, you don't have to stop drilling to clear these bits manually. The flutes improve coolant flow to dissipate heat and prevent clogs that can damage the bit and ruin the hole.

High-Speed Steel Jobbers' Length


Parabolic Flute	High Helix Flute	Split

Our basic drill bit material is also the most versatile. These jobbers' 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.

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.

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 deep holes.

High Helix Flute—Less aggressive than parabolic flutes for cleaner cuts in soft metals.

Round Shank—The most common shank type. These fit in the chuck of drill presses and portable drills.

Split Point—Starts cutting on contact so you don’t need a pilot hole. The point also keeps the bit centered for straight and accurate holes, even with a portable drill.

						Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Flute Type	Type	Size, mm	Drill Bit Point Type	No. of Flutes	Specs. Met		Each
Black Oxide





				Metric
				4.0	0.1575"	75	35	High Helix	Round	4	Split	2	DIN 338	00000000	00000
				4.2	0.1654"	75	34.6	High Helix	Round	4.2	Split	2	DIN 338	00000000	0000

				Titanium Nitride (TiN) Coated





								Metric
								4.0	0.1575"	75	43	Parabolic	Round	4	Split	2	DIN 338	0000000	0000

								Uncoated





												Metric
												4.0	0.1575"	75	35	Parabolic	Round	4	Split	2	DIN 338	0000000	0000

Cobalt Steel Jobbers' Length

Parabolic Flute

Split

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

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 deep holes.

Round Shank—The most common shank type. These fit in the chuck of drill presses and portable drills.

Split Point—Starts cutting on contact so you don’t need a pilot hole. The point also keeps the bit centered for straight and accurate holes, even with a portable drill.

						Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Flute Type	Type	Size, mm	Drill Bit Point Type	No. of Flutes	Specs. Met		Each
Uncoated





				Metric
				3.9	0.1535"	75	43	Parabolic	Round	3.9	Split	2	DIN 338	00000000	00000
				4.1	0.1614"	75	43	Parabolic	Round	4.1	Split	2	DIN 338	00000000	0000
				4.15	0.1634"	75	43	Parabolic	Round	4.15	Split	2	DIN 338	00000000	0000
				4.25	0.1673"	75	43	Parabolic	Round	4.25	Split	2	DIN 338	00000000	0000

Chip-Clearing Drill Bits for Nickel and Stainless Steel

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.

Cobalt Steel Jobbers' Length

Parabolic Flute

Round Shank

Split

Round Shank—The most common shank type. These fit in the chuck of drill presses and portable drills.

Split Point—Starts cutting on contact so you don’t need a pilot hole. The point also keeps the bit centered for straight and accurate holes, even with a portable drill.

						Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Flute Type	Type	Size, mm	Drill Bit Point Type	No. of Flutes	Specs. Met		Each
Titanium Aluminum Nitride (TiAlN) Coated





				Metric
				4.0	0.1575"	75	43	Parabolic	Round	4	Split	2	DIN 338	0000000	000000
				4.2	0.1654"	75	43	Parabolic	Round	4.2	Split	2	DIN 338	0000000	00000

Left-Hand Drill Bits

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 Jobbers' Length

Spiral Flute

Round Shank

Standard

Our basic drill bit material is also the most versatile. These jobbers' 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.

Round Shank—The most common shank type. These fit in the chuck of drill presses and portable drills.

Standard Point—Require more pressure to start holes than split-point 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	No. of Flutes	Specs. Met		Each
Black Oxide





				Metric
				3.8	0.1496"	75	15.2	Spiral	Round	3.8	Standard	2	DIN 338	000000000	000000
				4.0	0.1575"	75	35	Spiral	Round	4	Standard	2	DIN 338	00000000	0000
				4.2	0.1654"	75	34.6	Spiral	Round	4.2	Standard	2	DIN 338	00000000	00000

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.

High-Speed Steel Jobbers' Length

Our basic drill bit material is also the most versatile. These jobbers' 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	Type	Size, mm	Point Angle	Drill Bit Point Type	No. of Flutes	Flute Type		Each
Uncoated





				Metric
				4.0	0.1575"	75	43	Round	4	60°	Standard	2	Spiral	000000000	00000