12 1/4" Long Drill Bits | McMaster-Carr

Tough and wear resistant, cobalt steel bits last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without being damaged on hard materials, such as nickel.

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







				Uncoated

				1 1/16"	1.0625"	12 1/4"	6.63"	Morse Taper	Morse 4	Split	3068A35	0000000

Carbide-Insert Drill Bits

Shown with Carbide Inserts

(Sold Separately)

When you need to drill dozens or even hundreds of holes, use a bit with replaceable carbide inserts. Once the cutting edges wear down, just change the inserts instead of sharpening or throwing the bit away. The holes in the bit channel coolant through the tool for more efficient chip evacuation. Also known as indexable drill bits.

Each drill bit requires two inserts—one on the inner cutting edge and one on the outer cutting edge. Replacement inserts are sold separately.

Drill Bits											Replacement Insert Screws
				Shank			For Insert
Drill Bit Size	Decimal Size Equiv.	Overall Lg.	Max. Drilling Dp.	Type	Size	Drill Bit Point Type	Inner Inscribed Circle Dia.	Outer Inscribed Circle Dia.		Each		Each



	1 5/8"	1.625"	12 1/4"	8.13"	Round	1 1/2"	Carbide Insert	0.486"	0.498"	2769N36	000000000	2780N15	00000


	2 1/2"	2.5"	12 1/4"	7 1/2"	Round	1 1/2"	Carbide Insert	0.705"	0.732"	2769N41	00000000	2780N16	0000

Drill Bit Inserts


Inner Inserts	Outer Inserts


Inner Inserts	Outer Inserts

								Each		Package
	For Drill Bit Size	IC Dia.	Thk.	Hole Dia.	Tip Radius	For Use On	Features		Each	Pkg. Qty.		Pkg.
Inner Inserts







				Titanium Aluminum Nitride (TiAlN)-Coated Carbide

				1 1/2", 1 5/8"	0.486"	5/32"	3/16"	1/32"	Aluminum, Brass, Bronze, Fiberglass, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	Chip Breakers	2776N24	000000	10	2776N664	0000000


				2 1/4", 2 1/2"	0.705"	7/32"	3/16"	1/32"	Aluminum, Brass, Bronze, Fiberglass, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	Chip Breakers	2776N28	00000	10	2776N786	000000


				Outer Inserts







								Titanium Nitride (TiN)-Coated Carbide

								1 1/2", 1 5/8"	0.498"	5/32"	3/16"	3/64"	Aluminum, Brass, Bronze, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	Chip Breakers	2776N25	00000	10	2776N696	000000


								2 1/4", 2 1/2"	0.732"	7/32"	3/16"	3/64"	Aluminum, Brass, Bronze, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	Chip Breakers	2776N29	00000	10	2776N945	000000

Carbide-Tipped Drill Bits for Masonry and Concrete

Crush rather than cut material so bits don’t jam or overheat while drilling masonry and concrete. The ultra-hard carbide tip breaks masonry into pieces and the widely spaced flutes channel them out of the hole. These bits stay sharp, resisting wear and heat that will dull or break other bits.

SDS-Plus Shank for Hammer and Rotary Drilling


	SDS-Plus Shank

The slotted shank fits SDS-Plus-drive rotary hammers, which rotate and hammer bits simultaneously to penetrate material. Also known as percussion or impact bits.

	Max. Drilling Dp.	Specs. Met		Each
Uncoated







	Standard Point

	1/4"	0.25"	12 1/4"	9.63"	ANSI B212.15	8948A65	000000

DeWalt Electric Drills

Style B

A traditional pistol-grip shape makes these drills suitable for a variety of drilling applications. They have a variable speed motor—the further you depress the trigger, the faster the drill rotates.

Keyed Chuck—Drills with keyed chuck can be tightened with the included key.

	For Max. Bit Shank Size	Max. No-Load Rotational Speed, rpm	Chuck Type	Chuck Key Included	Current, amp	Gear Housing Material	Overall Lg.	Wt., lb.	Mfr. Model No.	Certification	Features		Each
Pistol Grip



	B	1/2"	1,250	Keyed	Yes	10	Metal	12 1/4"	5	DWD210G	CSA Certified, UL Listed	360° Adjustable Side Handle	28135A82	0000000