114mm Long Drill Bits | McMaster-Carr

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—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

				7.7	0.3032"	114	79.8	Round	7.7 mm	Split	30565A302	00000	—	———	0


				7.8	0.3071"	114	79.8	Round	7.8 mm	Split	30565A303	0000	—	———	0
				7.9	0.311"	114	79.8	Round	7.9 mm	Split	30565A304	0000	—	———	0
				8.0	0.315"	114	79.8	Round	8 mm	Split	30565A305	0000	5	30565A443	000000




						Uncoated

						8.0	0.315"	114	74.6	Round	8 mm	Standard	2951A141	0000	—	———	0

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.

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

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







				Titanium Nitride (TiN) Coated

				10.0	0.3937"	114	73	Round	10 mm	Four Facet	3030A87	0000000




						Uncoated

						10.0	0.3937"	114	58.4	Round	10 mm	Four Facet	3030A41	000000


						10.5	0.4134"	114	73	Round	10.5 mm	Four Facet	3030A68	000000
						11.0	0.4331"	114	73	Round	11 mm	Four Facet	3030A43	000000

Carbide Drill Bits for Carbon Fiber, Fiberglass, and Graphite

Jobbers' Length

Cut clean holes in abrasive material without fraying or delaminating the surface. Made of carbide, these bits resist wear to retain a sharp edge, even after after hundreds of cuts.

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







				Diamond Coated

				10.0	0.3937"	114	73	Round	10	140°	Brad	Fluted	3162A71	0000000




						Uncoated

						10.0	0.3937"	114	73	Round	10	140°	Brad	Fluted	2828A131	000000


						10.5	0.4134"	114	73	Round	10.5	140°	Brad	Fluted	2828A132	000000
						11.0	0.4331"	114	73	Round	11	140°	Brad	Fluted	2828A133	000000

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.

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

				7.7	0.3032"	114	80.2	Round	7.7 mm	Split	29355A126	000000	00000


				8.0	0.315"	114	80.2	Round	8 mm	Split	29355A132	00000	0000

Carbide-Tipped Drill Bits

Jobbers' 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.

					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

				8.0	0.315"	114	66	Round	8 mm	Standard	28595A73	000000


				8.0	0.315"	114	81	Round	8 mm	Split	28595A32	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

				7.5	0.2953"	114	30	Round	7.5 mm	Notched	2973A67	000000


				8.0	0.315"	114	32	Round	8 mm	Notched	2973A68	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

				8.0	0.315"	114	81	Round	8 mm	Split	3474A63	000000	000000

High-Speed Steel Square End Mills

4 Flutes

Use these end mills for general purpose milling in most material, such as aluminum, brass, bronze, iron, and steel. They have a square end for milling square slots, pockets, and edges.

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.

Uncoated High-Speed Steel—Use uncoated end mills for general purpose milling and short production runs.

Center Cutting—Center-cutting end mills allow plunge cuts into a surface.

	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
Uncoated High-Speed Steel







				4 Flutes

				25	0.000 to 0.038	25	50.8	114	Equal	30°	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Center Cutting	Square	8854A35	000000