48mm 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
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type	Pkg. Qty.		Pkg.
Jobbers' Length







				Gold Oxide

				1.2	0.0472"	48	19	Round	1.2 mm	Standard	1	30565A215	00000


				1.25	0.0492"	48	19	Round	1.3 mm	Standard	1	30565A216	0000
				1.25	0.0492"	48	19	Round	1.3 mm	Standard	10	30565A412	00000
				1.3	0.0512"	48	19	Round	1.3 mm	Standard	1	30565A217	0000
				1.3	0.0512"	48	19	Round	1.3 mm	Standard	10	30565A413	00000
				1.35	0.0531"	48	19	Round	1.4 mm	Standard	1	30565A218	0000
				1.4	0.0551"	48	19	Round	1.4 mm	Standard	1	30565A219	0000
				1.45	0.0571"	48	19	Round	1.5 mm	Standard	1	30565A221	0000
				1.5	0.0591"	48	19	Round	1.5 mm	Standard	1	30565A222	0000
				1.5	0.0591"	48	19	Round	1.5 mm	Standard	10	30565A414	00000
				1.55	0.061"	48	19	Round	1.6 mm	Standard	1	30565A223	0000


				1.6	0.063"	48	19	Round	1.6 mm	Standard	1	30565A224	0000
				1.6	0.063"	48	19	Round	1.6 mm	Standard	10	30565A415	00000




						Uncoated

						1.2	0.0472"	48	25.4	Round	1.2 mm	Standard	1	2951A125	0000


						1.25	0.0492"	48	22.2	Round	1.3 mm	Standard	1	2951A115	0000
						1.3	0.0512"	48	22.2	Round	1.3 mm	Standard	1	2951A116	0000
						1.35	0.0531"	48	22.2	Round	1.4 mm	Standard	1	2951A117	0000
						1.4	0.0551"	48	22.2	Round	1.4 mm	Standard	1	2951A118	0000
						1.5	0.0591"	48	22.2	Round	1.5 mm	Standard	1	2951A119	0000
						1.6	0.063"	48	22.2	Round	1.6 mm	Standard	1	2951A121	0000

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.

Uncoated—Polished to eject chips, these are 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







				Titanium Nitride (TiN) Coated

				1.5	0.0591"	48	20	Parabolic	Round	1.5	Split	2771N41	00000




						Uncoated

						1.6	0.063"	48	20	Parabolic	Round	1.6	Split	2771N42	0000


						1.65	0.065"	48	20	Parabolic	Round	1.65	Split	2771N711	0000

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

				1.5	0.0591"	48	22	Round	1.5 mm	Split	3474A48	00000	00000