40mm 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		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

				1.35	0.0531"	40	15.3	Round	1.4 mm	Standard	2958A2	00000	—	———	0


				1.4	0.0551"	40	15.2	Round	1.4 mm	Standard	2958A34	0000	—	———	0
				1.45	0.0571"	40	15.1	Round	1.5 mm	Standard	2958A21	0000	—	———	0
				1.5	0.0591"	40	15	Round	1.5 mm	Standard	2958A36	0000	10	2958A362	000000




						Titanium Nitride (TiN) Coated

						1.5	0.0591"	40	15	Round	1.5 mm	Standard	8950A35	0000	—	———	0


						Short Length







										Black Oxide

										2.2	0.0866"	40	5.5	Round	2.2 mm	Standard	28255A79	0000	—	———	0




												Titanium Nitride (TiN) Coated

												2.3	0.0906"	40	5.7	Round	2.3 mm	Split	2979N47	0000	—	———	0

Cobalt Steel Drill Bits

Jobbers' Length

Round Shank

Standard

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

				1.35	0.0531"	40	18	Round	1.35 mm	Split	5058N113	00000


				1.4	0.0551"	40	18	Round	1.4 mm	Split	5058N114	0000
				1.45	0.0571"	40	18	Round	1.5 mm	Standard	5058N14	0000




						Titanium Aluminum Nitride (TiAlN) Coated

						1.45	0.0571"	40	18	Round	1.5 mm	Split	2753A214	00000


						1.5	0.0591"	40	18	Round	1.5 mm	Split	2753A215	00000




								Gold Oxide

								1.35	0.0531"	40	15.3	Round	1.4 mm	Split	29355A18	0000


								1.4	0.0551"	40	15.2	Round	1.4 mm	Split	29355A19	0000
								1.45	0.0571"	40	15.1	Round	1.5 mm	Split	29355A21	0000
								1.5	0.0591"	40	15	Round	1.5 mm	Split	29355A22	0000

Carbide Drill Bits

Jobbers' Length

Round Shank

The hardest and most wear-resistant drill bits you can buy. Carbide 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.

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

Uncoated—Excellent for a range of materials but won't last as long as coated 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

				1.35	0.0531"	40	15.98	Round	1.35 mm	Four Facet	3030A65	000000


				1.40	0.0551"	40	15.9	Round	1.4 mm	Four Facet	3030A66	00000

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.

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
	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







				Uncoated

				1.4	0.0551"	40	5.6	Round	1.4 mm	Standard	29855A116	000000	000000


				1.5	0.0591"	40	13.5	Round	1.5 mm	Standard	29855A33	0000	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

				1.5	0.0591"	40	18	Parabolic	Round	1.5	Split	3020A32	000000

Chip-Clearing High-Speed Steel Drill Bits


Jobbers' Length High Helix Flute Round Shank	Jobbers' Length Parabolic Flute Round Shank

Standard

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.

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

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.

						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







				Black Oxide

				1.5	0.0591"	40	15	High Helix	Round	1.5	Standard	30055A36	00000




						Titanium Nitride (TiN) Coated

						1.5	0.0591"	40	18	Parabolic	Round	1.5	Split	7333N11	0000




								Uncoated

								1.5	0.0591"	40	15	Parabolic	Round	1.5	Split	2754A21	0000

Carbide Square End Mills for Carbon Fiber, Fiberglass, and Graphite

2 Flutes

4 Flutes

A diamond or diamondlike coating on these end mills makes them good for machining abrasive material, such as carbon fiber, fiberglass, and graphite. 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. They have a square end for milling square-bottomed slots, pockets, and edges. All are center cutting, allowing plunge cuts into a surface.

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.

Diamond-Coated Carbide—Diamond-coated end mills are good for long production runs. They run twice as fast as other carbide end mills and last up to 30 times longer.

	Mill, mm
	Dia.	Dia. Tolerance	Shank Dia., mm	Lg. of Cut, mm	Overall Lg., mm	Flute Spacing	Helix Angle	For Use On	End Mill Type	Cut Style		Each
Diamond-Coated Carbide







				2 Flutes

				0.2	-0.025 to 0	3	0.3	40	Equal	30°	Carbon Fiber, Fiberglass, Graphite	Center Cutting	Square	3725A301	0000000


				0.3	-0.025 to 0	3	0.45	40	Equal	30°	Carbon Fiber, Fiberglass, Graphite	Center Cutting	Square	3725A302	000000
				0.4	-0.025 to 0	3	0.6	40	Equal	30°	Carbon Fiber, Fiberglass, Graphite	Center Cutting	Square	3725A303	000000
				0.5	-0.025 to 0	3	1.5	40	Equal	30°	Carbon Fiber, Fiberglass, Graphite	Center Cutting	Square	3725A304	000000
				0.6	-0.025 to 0	3	1.8	40	Equal	30°	Carbon Fiber, Fiberglass, Graphite	Center Cutting	Square	3725A305	000000
				0.8	-0.025 to 0	3	2.4	40	Equal	30°	Carbon Fiber, Fiberglass, Graphite	Center Cutting	Square	3725A306	000000
				1	-0.025 to 0	3	3	40	Equal	30°	Carbon Fiber, Fiberglass, Graphite	Center Cutting	Square	3725A307	000000




						4 Flutes

						2	-0.025 to 0	3	6	40	Equal	30°	Carbon Fiber, Fiberglass, Graphite	Center Cutting	Square	3725A308	000000

Carbide Ball End Mills for Carbon Fiber, Fiberglass, and Graphite

Ball Cut Style

2 Flutes

These end mills have a diamond or diamondlike coating for machining abrasive material, such as carbon fiber, fiberglass, and graphite. Made of solid carbide, they are harder, stronger, and more wear resistant than high-speed steel and cobalt steel for the longest life and best finish. 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. They have a ball end for milling rounded slots, slopes, and contours. All are center cutting, allowing plunge cuts into a surface.

Diamond-Coated Carbide—Diamond-coated end mills are good for long production runs. They run twice as fast as other carbide end mills and last up to 30 times longer.

	Mill, mm
	Dia.	Dia. Tolerance	Shank Dia., mm	Lg. of Cut, mm	Overall Lg., mm	Flute Spacing	Helix Angle	For Use On	End Mill Type	Cut Style		Each
Diamond-Coated Carbide







				2 Flutes

				0.2	0.185 to 0.2000	4	0.4	40	Equal	30°	Carbon Fiber, Fiberglass, Graphite	Center Cutting	Ball	3725A11	0000000


				0.3	0.285 to 0.3000	4	0.6	40	Equal	30°	Carbon Fiber, Fiberglass, Graphite	Center Cutting	Ball	3725A12	000000
				0.4	0.385 to 0.4000	4	0.8	40	Equal	30°	Carbon Fiber, Fiberglass, Graphite	Center Cutting	Ball	3725A13	000000
				0.5	0.485 to 0.5000	4	2.5	40	Equal	30°	Carbon Fiber, Fiberglass, Graphite	Center Cutting	Ball	3725A14	000000