142mm Long Drill Bits | McMaster-Carr

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

				10.7	0.4213"	142	92	Parabolic	Round	10.7	Split	2771N796	000000


				10.8	0.4252"	142	92	Parabolic	Round	10.8	Split	2771N797	00000
				10.9	0.4291"	142	92	Parabolic	Round	10.9	Split	2771N798	00000
				11.1	0.437"	142	92	Parabolic	Round	11.1	Split	2771N799	00000
				11.2	0.4409"	142	92	Parabolic	Round	11.2	Split	2771N811	00000
				11.3	0.4449"	142	92	Parabolic	Round	11.3	Split	2771N812	00000
				11.4	0.4488"	142	92	Parabolic	Round	11.4	Split	2771N813	00000
				11.6	0.4567"	142	92	Parabolic	Round	11.6	Split	2771N815	00000
				11.7	0.4606"	142	92	Parabolic	Round	11.7	Split	2771N816	00000
				11.75	0.4626"	142	92	Parabolic	Round	11.75	Split	2771N817	00000
				11.8	0.4646"	142	92	Parabolic	Round	11.8	Split	2771N818	00000

High-Speed Steel Drill Bits

Jobbers' Length

Round Shank

Standard

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.

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		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







				Black Oxide

				10.8	0.4252"	142	72.4	Round	10.8 mm	Standard	2958A153	000000	—	———	0


				11.0	0.4331"	142	72	Round	11 mm	Standard	2958A154	00000	5	2958A235	000000
				11.2	0.4409"	142	71.6	Round	11.2 mm	Standard	2958A155	00000	—	———	0
				11.5	0.4528"	142	71	Round	11.5 mm	Standard	2958A156	00000	—	———	0
				11.8	0.4646"	142	70.4	Round	11.8 mm	Standard	2958A157	00000	—	———	0




						Titanium Nitride (TiN) Coated

						11.0	0.4331"	142	72	Round	11 mm	Standard	8950A64	00000	—	———	0


						11.5	0.4528"	142	71	Round	11.5 mm	Standard	8950A65	00000	—	———	0

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.

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.

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







				Titanium Nitride (TiN) Coated

				10.8	0.4252"	142	94	Round	10.8 mm	Split	5058N42	000000


				11.5	0.4528"	142	94	Round	11.5 mm	Split	5058N144	00000




						Gold Oxide

						10.8	0.4252"	142	72.4	Round	10.8 mm	Split	29355A162	00000


						11.0	0.4331"	142	72	Round	11 mm	Split	29355A163	00000
						11.5	0.4528"	142	71	Round	11.5 mm	Split	29355A165	00000
						11.8	0.4646"	142	70.4	Round	11.8 mm	Split	29355A166	00000




								Uncoated

								11.2	0.4409"	142	94	Round	11.2 mm	Split	29355A172	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



		11.0	0.4331"	142	102	Round	11	60°	Standard	27465A428	000000


		11.5	0.4528"	142	105	Round	11.5	60°	Standard	27465A429	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

				11.0	0.4331"	142	94	Parabolic	Round	11	Split	7333N14	000000




						Uncoated

						11.0	0.4331"	142	72	Parabolic	Round	11	Split	2754A83	00000