105mm 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

				6.4	0.252"	105	69.9	Round	6.4 mm	Split	30565A287	00000	—	———	0


				6.5	0.2559"	105	69.9	Round	6.5 mm	Split	30565A288	0000	10	30565A438	000000
				6.6	0.2598"	105	69.9	Round	6.6 mm	Split	30565A289	0000	—	———	0
				6.7	0.2638"	105	69.9	Round	6.7 mm	Split	30565A291	0000	10	30565A439	00000
				6.8	0.2677"	105	69.9	Round	6.8 mm	Split	30565A292	0000	10	30565A44	00000
				6.9	0.2717"	105	69.9	Round	6.9 mm	Split	30565A293	0000	—	———	0
				7.0	0.2756"	105	69.9	Round	7 mm	Split	30565A294	0000	10	30565A441	00000




						Uncoated

						6.5	0.2559"	105	62.7	Round	6.5 mm	Standard	2951A137	0000	—	———	0


						7.0	0.2756"	105	69.1	Round	7 mm	Standard	2951A138	0000	—	———	0

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		1-9	10-Up
Jobbers' Length







				Uncoated

				6.5	0.2559"	105	73	Round	6.5 mm	Split	3474A59	000000	000000


				7.0	0.2756"	105	73	Round	7 mm	Split	3474A61	00000	00000

High-Speed Steel Square End Mills

2 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.

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’re more wear resistant than uncoated end mills, which means they last longer when run at similar speeds.

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







				2 Flutes

				25	0.000 to 0.025	25	41.3	105	Equal	30°	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Center Cutting	Square	8853A91	000000


				Titanium Nitride (TiN)-Coated High-Speed Steel







								2 Flutes

								25	0.000 to 0.025	25	41.3	105	Equal	30°	Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Tool Steel	Center Cutting	Square	8694A38	00000

High-Speed Steel Square End Mills with Two Milling Ends

2 Flutes

When one end wears out, switch to the opposite end for two times the life of a standard high-speed steel end mill. Made of high-speed steel, these end mills are for general purpose milling in most material, such as aluminum, brass, bronze, iron, and steel. Their square ends make them good for milling square slots, pockets, and edges. All are center cutting, allowing plunge cuts into a surface.

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

	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







				2 Flutes

				10	0.0000 to 0.0760	12.7	20.6	105	Equal	30°	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Center Cutting	Square	8855A68	000000


				12	0.0000 to 0.0760	12.7	20.6	105	Equal	30°	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Center Cutting	Square	8855A71	00000

Cobalt Steel Square End Mills with Two Milling Ends

4 Flutes

When one end wears out, switch to the opposite end for two times the life of a standard cobalt steel end mill. 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, hardened steel, titanium, and tool steel. Their square ends make them good for milling square slots, pockets, and edges. All are center cutting, allowing plunge cuts into a surface.

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

	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 Cobalt Steel







				4 Flutes

				10	-0.0380 to 0.0000	12.7	25.4	105	Equal	30°	Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	Center Cutting	Square	8891A38	000000


				11	-0.0380 to 0.0000	12.7	25.4	105	Equal	30°	Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	Center Cutting	Square	8891A39	00000
				12	-0.0380 to 0.0000	12.7	25.4	105	Equal	30°	Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	Center Cutting	Square	8891A41	00000

High-Speed Steel Corner-Rounding End Mills

Corner-Rounding Cut

Style

Use these versatile end mills for milling in most material, including aluminum, brass, bronze, iron, and steel. They have scooped corners for rounding the sharp edges of your workpiece.

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—Titanium nitride (TiN)-coated end mills create less friction than uncoated end mills, which means they last longer when run at similar speeds. Use coated end mills for demanding, high-speed jobs in hard material as well as for longer production runs. The coating reduces friction and vibration as they’re used, making them more wear resistant than uncoated end mills.

Aluminum Titanium Nitride (ALTiN)-Coated High-Speed Steel—Aluminum titanium nitride (AlTiN)-coated end mills dissipate heat better than other end mills, especially at high speeds. At high temperatures, the coating creates a layer of aluminum oxide that transfers heat to the chips, keeping the tool cool, even when used without lubrication. Use coated end mills for demanding, high-speed jobs in hard material as well as for longer production runs. The coating reduces friction and vibration as they’re used, making them more wear resistant than uncoated end mills.

									Uncoated High-Speed Steel		Titanium Nitride (TiN)-Coated High-Speed Steel		Aluminum Titanium Nitride (ALTiN)-Coated High-Speed Steel
	Cut Radius, mm	Tip Dia., mm	Mill Dia., mm	Shank Dia., mm	Overall Lg., mm	Flute Spacing	For Use On	Cut Style		Each		Each		Each
4 Flutes



		12	11	38.1	25.5	105	Equal	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Corner Rounding	30245A515	0000000	8375N53	0000000	8412N53	0000000


		13	8.5	38.1	25.5	105	Equal	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Corner Rounding	30245A75	000000	8375N54	000000	8412N54	000000
		14	11.5	41.2	25.5	105	Equal	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Corner Rounding	30245A76	000000	8375N55	000000	8412N55	000000