46mm Long Drill Bits | McMaster-Carr

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26 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						Each
	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		1-11	12-Up
Black Oxide





				Metric
				1.75	0.0689"	46	18.5	Spiral	Round	1.8	Standard	2	DIN 338	0000000	00000	00000
				1.8	0.0709"	46	18.4	Spiral	Round	1.8	Standard	2	DIN 338	0000000	0000	0000
				1.9	0.0748"	46	18.2	Spiral	Round	1.9	Standard	2	DIN 338	0000000	0000	0000

				Titanium Nitride (TiN) Coated





								Metric
								1.8	0.0709"	46	18.4	Spiral	Round	1.8	Standard	2	DIN 338	0000000	0000	0000

High-Speed Steel Short Length

Round Shank


Standard	Split

Our shortest high-speed steel bits, these are the most rigid for drilling the straightest holes. They're also good for tight spaces where longer bits can't fit. Also known as screw-machine and stub-length bits.

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.

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
				2.7	0.1063"	46	6.7	Spiral	Round	2.7	Standard	2	DIN 1897	00000000	00000
				2.8	0.1102"	46	7	Spiral	Round	2.8	Standard	2	DIN 1897	00000000	0000
				2.9	0.1142"	46	7.2	Spiral	Round	2.9	Standard	2	DIN 1897	00000000	0000
				3.0	0.1181"	46	9.9	Spiral	Round	3	Split	2	DIN 1897	00000000	0000

				Titanium Nitride (TiN) Coated





								Metric
								2.7	0.1063"	46	6.7	Spiral	Round	2.7	Standard	2	DIN 1897	0000000	0000
								2.9	0.1142"	46	7.2	Spiral	Round	2.9	Standard	2	DIN 1897	0000000	0000
								3.0	0.1181"	46	16	Spiral	Round	3	Split	2	DIN 1897	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
				1.75	0.0689"	46	18.5	Spiral	Round	1.8	Split	2	NAS907 Type J	00000000	00000
				1.8	0.0709"	46	18.4	Spiral	Round	1.8	Split	2	NAS907 Type J	00000000	0000
				1.85	0.0728"	46	18.3	Spiral	Round	1.9	Split	2	NAS907 Type J	00000000	0000
				1.9	0.0748"	46	18.2	Spiral	Round	1.9	Split	2	NAS907 Type J	00000000	0000

				Titanium Nitride (TiN) Coated





								Metric
								1.75	0.0689"	46	22	Spiral	Round	1.75	Split	2	DIN 338	00000000	0000
								1.8	0.0709"	46	22	Spiral	Round	1.8	Split	2	DIN 338, NAS907 Type J	0000000	0000
								1.85	0.0728"	46	22	Spiral	Round	1.85	Split	2	DIN 338	00000000	0000
								1.9	0.0748"	46	22	Spiral	Round	1.9	Split	2	DIN 338	00000000	0000

								Titanium Aluminum Nitride (TiAlN) Coated





												Metric
												1.8	0.0709"	46	22	Spiral	Round	1.8	Split	2	DIN 338, NAS907 Type J	00000000	00000
												1.9	0.0748"	46	22	Spiral	Round	1.9	Split	2	DIN 338, NAS907 Type J	00000000	00000

Carbide Jobbers' Length

Round Shank

The hardest and most wear-resistant drill bits you can buy in a length that's rigid enough for most applications. These bits stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. 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.

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
Uncoated





				Metric
				1.8	0.0709"	46	22	Spiral	Round	1.8	Four Facet	2	0000000	000000
				1.9	0.0748"	46	22	Spiral	Round	1.9	Four Facet	2	0000000	00000

Smooth-Finish Drill Bits

With more cutting edges than other drill bits, these cut continuously and consistently for a smoother finish. They also stay centered to produce holes that are straighter and more accurate. However, since there’s less space between the cutting edges, they don’t clear chips as quickly.

Carbide Jobbers' Length

Spiral Flute

Round Shank

Split

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.

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		Each
Uncoated





				Metric
				3.0	0.1181"	46	15.9	Spiral	Round	3	Split	3	000000	000000

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.

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.

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
Uncoated





				Metric
				1.8	0.0709"	46	7.2	Spiral	Round	1.8	Standard	2	DIN 338	000000000	000000
				1.9	0.0748"	46	7.6	Spiral	Round	1.9	Standard	2	DIN 338	000000000	00000