41mm Long Drill Bits | McMaster-Carr

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.

Black/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				Each		Package
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type	Mfr.		Each	Pkg. Qty.		Pkg.
Jobbers' Length







				Uncoated

				1.0	0.0394"	41	17.5	Round	1 mm	Standard	Viking Norseman Drill	2951A111	00000	—	———	0


				1.05	0.0413"	41	17.5	Round	1.1 mm	Standard	Viking Norseman Drill	2951A112	0000	—	———	0




						Black/Gold Oxide

						1.0	0.0394"	41	14.2	Round	1 mm	Standard	Viking Norseman Drill	30565A211	0000	10	30565A411	000000


						1.05	0.0413"	41	14.2	Round	1.1 mm	Standard	Viking Norseman Drill	30565A212	0000	—	———	0

Chip-Clearing Cobalt Steel Drill Bits

Jobbers' Length

Parabolic Flute

Round Shank

Split

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.

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
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Flute Type	Type	Size, mm	Drill Bit Point Type	Mfr.		Each
Jobbers' Length







				Titanium Nitride (TiN) Coated

				1.0	0.0394"	41	15	Parabolic	Round	1	Split	Viking Norseman Drill	2771N39	00000