85mm Long Drill Bits | McMaster-Carr

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.

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.

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	Type	Size	Drill Bit Point Type	Mfr.		Each
Extended Length







				Black Oxide

				2.0	0.0787"	85	56	Round	2 mm	Standard	Dormer Pramet	88455A114	00000




						Uncoated

						2.0	0.0787"	85	52.3	Round	2 mm	Standard	Dormer Pramet	3083A122	0000

High-Speed Steel Precise-Cut Drill Bits for Wood

Wear and heat resistant, these stay sharp longer than precise-cut bits made of plain steel. The sharp center point keeps the bit from wandering during drilling to cut accurate straight and overlapping holes, even across the grain. Also known as brad-point bits.

	Max. Drilling Dp., mm	Shank Size, mm	Drill Bit Point Type	Mfr.		Each
Uncoated







	Round Shank

	5.0	0.1969"	85	50	5	Brad	Stern	28205A73	000000

Cobalt Steel Tapered Square End Mills

Tapered Cut Style

3 Flutes

With better heat and wear resistance than high-speed steel, these cobalt steel end mills can run at higher speeds and provide better performance on hard material, such as iron and steel. Also known as taper degree end mills, they're often used to machine angled slots in dies and molds.

Uncoated Cobalt Steel—Use uncoated end mills for general purpose milling and short production runs. They stay sharper than coated end mills when used on soft materials like aluminum, leaving a better finish.

Titanium Nitride (TiN)-Coated Cobalt Steel—Use titanium nitride (TiN)-coated end mills for demanding, high-speed jobs in hard material as well as for longer production runs. They create less friction than uncoated end mills, which means they last longer when run at similar speeds.

3 Flutes—End mills with three flutes provide better chip clearance for high-volume, high-speed plunge, slotting, and roughing cuts.

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

		Mill, mm
	Taper Angle per Side	Dia.	Dia. Tolerance	Max. Taper Dia., mm	Shank Dia., mm	Lg. of Cut, mm	Overall Lg., mm	Flute Spacing	For Use On	End Mill Type	Cut Style		Each
Uncoated Cobalt Steel







				3 Flutes

				7°	4	-0.0508 to 0.0508	11.4	12	30	85	Equal	Aluminum, Brass, Bronze, Copper, Fiberglass, Iron, Plastic, Steel	Center Cutting	Tapered	8147N614	000000


				30°	6	-0.0508 to 0.0508	34.9	20	25	85	Equal	Aluminum, Brass, Bronze, Copper, Fiberglass, Iron, Plastic, Steel	Center Cutting	Tapered	8147N914	000000


				Titanium Nitride (TiN)-Coated Cobalt Steel







								3 Flutes

								7°	4	-0.0508 to 0.0508	11.4	12	30	85	Equal	Aluminum, Brass, Bronze, Copper, Fiberglass, Iron, Plastic, Steel	Center Cutting	Tapered	8296N614	00000


								30°	6	-0.0508 to 0.0508	34.9	20	25	85	Equal	Aluminum, Brass, Bronze, Copper, Fiberglass, Iron, Plastic, Steel	Center Cutting	Tapered	8296N914	000000

High-Speed Steel Tapered Square End Mills

Tapered Cut Style

3 Flutes

4 Flutes

Use these versatile end mills for milling in most material, including aluminum, brass, bronze, iron, and steel. Also known as taper degree end mills, they're often used to machine angled slots in dies and molds.

Uncoated High-Speed Steel—Use uncoated end mills for general purpose milling and short production runs. They stay sharper than coated end mills when used on soft materials like aluminum, leaving a better finish.

Titanium Nitride (TiN)-Coated High-Speed Steel—Use titanium nitride (TiN)-coated end mills for demanding, high-speed jobs in hard material as well as for longer production runs. They create less friction than uncoated end mills, which means they last longer when run at similar speeds.

3 Flutes—End mills with three flutes provide better chip clearance for high-volume, high-speed plunge, slotting, and roughing cuts.

4 Flutes—End mills with four flutes provide a finer finish and operate with less vibration when run at high speeds.

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

		Mill, mm
	Taper Angle per Side	Dia.	Dia. Tolerance	Max. Taper Dia., mm	Shank Dia., mm	Lg. of Cut, mm	Overall Lg., mm	Flute Spacing	For Use On	End Mill Type	Cut Style		Each
Uncoated High-Speed Steel







				3 Flutes

				7°	4	-0.0508 to 0.0508	11.4	12	30	85	Equal	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Center Cutting	Tapered	8936A123	000000




						4 Flutes

						30°	6	-0.0508 to 0.0508	34.9	20	25	85	Equal	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Center Cutting	Tapered	8936A132	000000


						Titanium Nitride (TiN)-Coated High-Speed Steel







										3 Flutes

										7°	4	-0.0508 to 0.0508	11.4	12	30	85	Equal	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Center Cutting	Tapered	8045N71	00000




												4 Flutes

												30°	6	-0.0508 to 0.0508	34.9	20	25	85	Equal	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Center Cutting	Tapered	8045N97	000000