152mm Long Drill Bits | McMaster-Carr

Cut large holes with drill presses and portable drills that have a standard-size chuck. The shank on these bits has a smaller diameter than the cutting tip. High-speed steel is good for general purpose drilling in most metals. Also known as Silver and Deming bits.

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.

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







				Black Oxide

				14.0	0.5512"	152	53.3	Reduced Round	1/2"	Standard	0000000	000000


				15.0	0.5906"	152	53.3	Reduced Round	1/2"	Standard	0000000	00000
				16.0	0.6299"	152	53.3	Reduced Round	1/2"	Standard	0000000	00000
				17.0	0.6693"	152	53.3	Reduced Round	1/2"	Standard	0000000	00000
				18.0	0.7087"	152	53.3	Reduced Round	1/2"	Standard	0000000	00000
				19.0	0.748"	152	53.3	Reduced Round	1/2"	Standard	0000000	00000
				20.0	0.7874"	152	53.3	Reduced Round	1/2"	Standard	0000000	00000
				21.0	0.8268"	152	53.3	Reduced Round	1/2"	Standard	0000000	00000
				22.0	0.8661"	152	53.3	Reduced Round	1/2"	Standard	0000000	00000
				24.0	0.9449"	152	53.3	Reduced Round	1/2"	Standard	0000000	00000
				26.0	1.0236"	152	53.3	Reduced Round	1/2"	Standard	0000000	00000


				27.0	1.063"	152	53.3	Reduced Round	1/2"	Standard	0000000	00000
				28.0	1.1024"	152	53.3	Reduced Round	1/2"	Standard	0000000	00000
				29.0	1.1417"	152	53.3	Reduced Round	1/2"	Standard	0000000	00000
				30.0	1.1811"	152	53.3	Reduced Round	1/2"	Standard	0000000	00000
				31.0	1.2205"	152	53.3	Reduced Round	1/2"	Standard	0000000	000000




						Gold Oxide

						13.0	0.5118"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000


						13.5	0.5315"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						14.0	0.5512"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						14.5	0.5709"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						15.0	0.5906"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						15.5	0.6102"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						16.0	0.6299"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						16.5	0.6496"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						17.0	0.6693"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						17.5	0.689"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						18.0	0.7087"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000


						18.5	0.7283"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						19.0	0.748"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						19.5	0.7677"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						20.0	0.7874"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						21.0	0.8268"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						22.0	0.8661"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						23.0	0.9055"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						24.0	0.9449"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000
						25.0	0.9843"	152	63.5	Reduced Round/3-Flat	1/2"	Split	0000000	00000

Reduced-Shank Cobalt Steel Drill Bits


Jobbers' Length	Split

More wear resistant than high-speed steel, these bits cut large holes with tools that have a standard-size chuck. The shank has a smaller diameter than the cutting tip and fits drill presses and portable drills. 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. Also known as Silver and Deming bits.

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	Type	Size	Drill Bit Point Type		Each
Jobbers' Length







				Uncoated

				13.0	0.5118"	152	58	Reduced Round	1/2"	Split	00000000	000000


				13.5	0.5315"	152	58	Reduced Round	1/2"	Split	00000000	00000
				14.0	0.5512"	152	58	Reduced Round	1/2"	Split	00000000	00000
				14.5	0.5709"	152	58	Reduced Round	1/2"	Split	00000000	00000
				15.0	0.5906"	152	58	Reduced Round	1/2"	Split	00000000	00000
				15.5	0.6102"	152	58	Reduced Round	1/2"	Split	00000000	00000
				16.0	0.6299"	152	58	Reduced Round	1/2"	Split	00000000	00000
				16.5	0.6496"	152	58	Reduced Round	1/2"	Split	00000000	00000
				17.0	0.6693"	152	58	Reduced Round	1/2"	Split	00000000	00000
				17.5	0.689"	152	58	Reduced Round	1/2"	Split	00000000	00000
				18.0	0.7087"	152	58	Reduced Round	1/2"	Split	00000000	00000


				18.5	0.7283"	152	58	Reduced Round	1/2"	Split	00000000	00000
				19.0	0.748"	152	58	Reduced Round	1/2"	Split	00000000	00000
				19.5	0.7677"	152	58	Reduced Round	1/2"	Split	00000000	00000
				20.0	0.7874"	152	58	Reduced Round	1/2"	Split	00000000	00000
				21.0	0.8268"	152	58	Reduced Round	1/2"	Split	00000000	00000
				21.5	0.8465"	152	58	Reduced Round	1/2"	Split	00000000	00000
				23.0	0.9055"	152	58	Reduced Round	1/2"	Split	00000000	000000
				24.0	0.9449"	152	58	Reduced Round	1/2"	Split	00000000	000000
				25.0	0.9843"	152	58	Reduced Round	1/2"	Split	00000000	000000

High-Speed Steel Drill Bits

Jobbers' Length

Round Shank

Standard

Split

Our basic drill bits are also the most versatile. Cut holes in a variety of metals, from the softest aluminum to the hardest steel.

Jobbers' Length—These 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.

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







				Gold Oxide

				12.5	0.4921"	152	113.1	Round	12.5 mm	Split	000000000	000000	—	———	0


				13.0	0.5118"	152	113.1	Round	13 mm	Split	000000000	00000	5	000000000	000000




						Uncoated

						12.5	0.4921"	152	100.8	Round	12.5 mm	Standard	00000000	00000	—	———	0


						13.0	0.5118"	152	100.8	Round	13 mm	Standard	00000000	00000	—	———	0

Carbide-Tipped Drill Bits

Jobbers' Length

Round Shank

Extended Length

Round Shank


Standard	Split

Performance similar to solid carbide but at a lower price point. Like carbide bits, these are stronger than cobalt and high-speed steel and maintain their sharp edges when drilling abrasive material. However, when drilling tough metals like iron and hardened steel, upgrade to carbide for longer life.

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

Extended Length—Drill through panels and thick workpieces with our longest bits. Their length is good for creating deep holes but makes them less rigid than other bits. As a result, they are more prone to wobbling or breaking, especially when drilling hard materials.

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







				Uncoated

				12.5	0.4921"	152	114	Round	12.5 mm	Standard	00000000	000000


				12.5	0.4921"	152	114	Round	12.5 mm	Split	00000000	00000


				Extended Length







								Uncoated

								5.0	0.1969"	152	79	Round	5 mm	Standard	000000000	00000


								5.5	0.2165"	152	79	Round	5.5 mm	Standard	000000000	00000

Carbide-Tipped Drill Bits for Hardened Steel

Jobbers' Length

Round Shank

Straight flutes withstand the heavy pressure needed to penetrate hardened steel. These bits cut more aggressively and resist stress better than spiral-flute bits. A lower-priced alternative to solid carbide, they stay sharp when drilling abrasive material but won’t last as long.

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	Type	Size	Drill Bit Point Type		Each
Jobbers' Length







				Uncoated

				12.5	0.4921"	152	50	Round	12.5 mm	Notched	0000000	000000


				13.0	0.5118"	152	52	Round	13 mm	Notched	0000000	00000
				13.5	0.5315"	152	54	Round	13.5 mm	Notched	0000000	00000
				14.0	0.5512"	152	56	Round	14 mm	Notched	0000000	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

				12.0	0.4724"	152	101	Parabolic	Round	12	Split	0000000	000000


				13.0	0.5118"	152	101	Parabolic	Round	13	Split	0000000	00000

Left-Hand Cobalt Steel Drill Bits

Jobbers' Length

Round Shank

Split

The flutes spiral in the opposite direction of other bits and stay sharp longer than high-speed steel. They’re 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.

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				Each
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type		1-4	5-Up
Jobbers' Length







				Uncoated

				12.5	0.4921"	152	114	Round	12.5 mm	Split	0000000	000000	000000


				13.0	0.5118"	152	114	Round	13 mm	Split	0000000	00000	00000