124mm Long Drill Bits | McMaster-Carr

Filter by

System of Measurement

Drill Bit Size

For Use On

Length Class

Drill Bit Point Type

Finish

Decimal Size Equivalent

Shank Size

Material

Overall Length

Point Angle

Flute Direction

Shank Type

Flute Type

Maximum Drilling Depth

Bit Style

Sold As

Number of Flutes

USMCA Qualifying

RoHS Compliance

REACH Compliance

Specifications Met

DFARS Compliance

Forward

How can we improve?

9 Products

Drill Bits

Cut holes in a variety of metals, from the softest aluminum to the hardest steel.

High-Speed Steel Jobbers' Length

Round Shank

Standard

Split

Our basic drill bit material is also the most versatile. These jobbers' bits have the balance of rigidity and length needed for most applications.

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.

Round Shank—The most common shank type. These fit in the chuck of drill presses and portable drills.

Standard Point—Good for general purpose drilling. You’ll need to make a pilot hole to center the bit.

Split Point—Starts cutting on contact so you don’t need a pilot hole. The point also keeps the bit centered for straight and accurate holes, even with a portable drill.

						Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Flute Type	Type	Size, mm	Drill Bit Point Type	No. of Flutes	Specs. Met	Pkg. Qty.		Pkg.
Gold Oxide





				Metric
				8.8	0.3465"	124	87.7	Spiral	Round	8.8	Split	2	NAS907 Type B	1	000000000	00000
				8.9	0.3504"	124	87.7	Spiral	Round	8.9	Split	2	NAS907 Type B	1	000000000	0000
				9.0	0.3543"	124	87.7	Spiral	Round	9	Split	2	NAS907 Type B	1	000000000	0000
				9.0	0.3543"	124	87.7	Spiral	Round	9	Split	2	NAS907 Type B	5	000000000	00000
				9.1	0.3583"	124	87.7	Spiral	Round	9.1	Split	2	NAS907 Type B	1	000000000	0000

				Uncoated





								Metric
								9.0	0.3543"	124	81	Spiral	Round	9	Standard	2	—	1	00000000	0000

Carbide-Tipped Steel Jobbers' Length

Round Shank

Split

The performance of solid carbide but at a lower price point. These jobbers' bits have the balance of rigidity and length needed for most applications. Like carbide bits, they 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.

Round Shank—The most common shank type. These fit in the chuck of drill presses and portable drills.

Split Point—Starts cutting on contact so you don’t need a pilot hole. The point also keeps the bit centered for straight and accurate holes, even with a portable drill.

						Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Flute Type	Type	Size, mm	Drill Bit Point Type	No. of Flutes		Each
Uncoated Carbide Tipped





				Metric
				9.0	0.3543"	124	89	Spiral	Round	9	Split	2	00000000	000000

Chip-Clearing Drill Bits

With flutes that lift chips out of the hole, you don't have to stop drilling to clear these bits manually. The flutes improve coolant flow to dissipate heat and prevent clogs that can damage the bit and ruin the hole.

Cobalt Steel Jobbers' Length

Parabolic Flute

Split

The toughness and wear resistance of cobalt steel in a length that's rigid enough for most applications. Cobalt lasts at least twice as long as high-speed steel. It can also run up to 25% faster at higher temperatures without damaging the bit on hard materials such as nickel.

Uncoated—Polished to eject chips, these are also known as bright finish bits.

Parabolic Flute—A U-shaped groove on the flutes cuts faster and clears chips more quickly than high-helix bits, so these are better for drilling deep holes.

Round Shank—The most common shank type. These fit in the chuck of drill presses and portable drills.

Split Point—Starts cutting on contact so you don’t need a pilot hole. The point also keeps the bit centered for straight and accurate holes, even with a portable drill.

						Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Flute Type	Type	Size, mm	Drill Bit Point Type	No. of Flutes	Specs. Met		Each
Uncoated





				Metric
				9.0	0.3543"	124	81	Parabolic	Round	9	Split	2	DIN 338	0000000	000000

Left-Hand Drill Bits

With flutes that spiral in the opposite direction of other bits, these are 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.

Cobalt Steel Jobbers' Length

Spiral Flute

Round Shank

Split

Uncoated—Polished to eject chips, these are also known as bright finish bits.

Round Shank—The most common shank type. These fit in the chuck of drill presses and portable drills.

Split Point—Easier to start holes and stay centered than standard-point 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	No. of Flutes	Specs. Met		Each
Uncoated





				Metric
				9.0	0.3543"	124	89	Spiral	Round	9	Split	2	NAS907 Type J	0000000	000000