3 7/16" 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.

Short Length—The most rigid bits for drilling the straightest holes.

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					Each
	Drill Bit Size	Decimal Size Equiv.	Overall Lg.	Max. Drilling Dp.	Type	Size	Drill Bit Point Type	Mfr.		1-5	6-Up
Short Length







				Titanium Nitride (TiN) Coated

				7/16"	0.4375"	3 7/16"	1.4"	Round	7/16"	Split	Chicago-Latrobe	2416A37	000000	000000

Chip-Clearing Carbide Drill Bits


Jobbers' Length Parabolic Flute Round Shank	Standard

The hardest and most wear-resistant bits, the flutes clear chips and improve coolant flow. They prevent clogs and dissipate heat that can damage the bit and the hole. Carbide bits stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than cobalt steel. Carbide can be brittle, however, so these bits require a rigid machine tool holder to prevent breakage and should not be used in hand drilling applications.

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 bits, especially on materials like hardened steel, iron, and stainless steel.

Uncoated—Excellent for a range of materials but won't last as long as coated bits.

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







				Titanium Nitride (TiN) Coated

				17 Ga.	0.173"	3 7/16"	1.99"	Parabolic	Round	0.1728"	Standard	Guhring	8822A965	000000


				16 Ga.	0.177"	3 7/16"	1.98"	Parabolic	Round	0.1772"	Standard	Guhring	8822A966	00000
				15 Ga.	0.18"	3 7/16"	1.97"	Parabolic	Round	0.1799"	Standard	Guhring	8822A967	00000
				14 Ga.	0.182"	3 7/16"	1.97"	Parabolic	Round	0.1819"	Standard	Guhring	8822A968	00000




						Uncoated

						17 Ga.	0.173"	3 7/16"	1.99"	Parabolic	Round	0.1728"	Standard	Guhring	8822A925	00000


						16 Ga.	0.177"	3 7/16"	1.98"	Parabolic	Round	0.1772"	Standard	Guhring	8822A926	00000
						15 Ga.	0.18"	3 7/16"	1.97"	Parabolic	Round	0.1799"	Standard	Guhring	8822A927	00000
						14 Ga.	0.182"	3 7/16"	1.97"	Parabolic	Round	0.1819"	Standard	Guhring	8822A928	00000

High-Speed Steel T-Slot End Mills

Use these versatile end mills for milling in most material, including aluminum, brass, bronze, iron, and steel. They're often used to create slots in machine tool tables, indexing tables, and other workholding surfaces.

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.

Titanium Carbon Nitride (TiCN)-Coated High-Speed Steel—Titanium carbon nitride (TiCN)-coated end mills have a hard, smooth finish that resists chipping and wear and prevents material from accumulating on the cutting edge. They’re especially good for use in aluminum. 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.

		Mill				Neck
	For T-Slot Bolt Size	Dia.	Dia. Tolerance	Thk.	Shank Dia.	Dia.	Lg.	Overall Lg.	For Use On	Cut Style	Mfr.		Each
Uncoated High-Speed Steel



		1/2"	31/32"	-0.010" to 0.000"	25/64"	3/4"	0.531"	63/64"	3 7/16"	Aluminum, Brass, Bronze, Hardened Steel, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	T-Slot	Whitney Tool	8789A12	0000000


		Titanium Nitride (TiN)-Coated High-Speed Steel



				1/2"	31/32"	-0.010" to 0.000"	25/64"	3/4"	0.531"	63/64"	3 7/16"	Aluminum, Brass, Bronze, Hardened Steel, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	T-Slot	Whitney Tool	8789A116	000000


				Titanium Carbon Nitride (TiCN)-Coated High-Speed Steel



						1/2"	31/32"	-0.010" to 0.000"	25/64"	3/4"	0.531"	63/64"	3 7/16"	Aluminum, Brass, Bronze, Hardened Steel, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	T-Slot	Whitney Tool	8789A126	000000


						Aluminum Titanium Nitride (ALTiN)-Coated High-Speed Steel



								1/2"	31/32"	-0.010" to 0.000"	25/64"	3/4"	0.531"	63/64"	3 7/16"	Aluminum, Brass, Bronze, Hardened Steel, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	T-Slot	Whitney Tool	8789A136	000000

Ball-End Driver Shafts


		Hex

Create your own tool by attaching these shafts to a handle, or use with socket wrenches and power tools. They have a ball end that allows angled entry to make good contact with the recess when a standard-tip shaft can’t.

Driver Extension Adapters—Create a tool that’s as long as you need. Attach a driver shaft to a screwdriver, T-handle key, or L-key to extend your reach, or chain multiple shafts together to reach deeply recessed fasteners.

	Driver Shafts						Driver Extension Adapters
	Drive Size	Overall Lg.	Max. Access Angle	Material		Each		Each
For Hex Drives



		0.050"	3 7/16"	25°	Black Phosphate-Coated Steel	6972A13	00000	9761N11	000000


		1.27 mm	3 7/16"	25°	Black Phosphate-Coated Steel	6972A43	0000	———	0

Cobalt Steel Square End Mills

2 Flutes

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. 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 Cobalt Steel—Use uncoated end mills for general purpose milling and short production runs.

Center Cutting—Center-cutting end mills allow plunge cuts into a surface.

	Mill
	Dia.	Dia. Tolerance	Shank Dia.	Lg. of Cut	Overall Lg.	Flute Spacing	Helix Angle	For Use On	End Mill Type	Cut Style	Mfr.		Each
Uncoated Cobalt Steel







				2 Flutes

				5/8"	0.000" to 0.001"	5/8"	1 5/16"	3 7/16"	Equal	30°	Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	Center Cutting	Square	Seco	2782A77	000000

Impact Spline Drive to Square Drive Adapters

Attach your square-drive impact socket to a spline-drive impact wrench. These tools are typically used where high torque is required, such as heavy equipment in the aerospace and automotive industries. These adapters are sturdy to withstand the high torque and force of impact tools.

Drive Size (Gender)	Overall Lg.	Material		Each
No. 5 Spline Drive (Female) × 3/4" Square Drive (Male)	3 7/16"	Black-Oxide Steel	8515N11	000000

High-Speed Steel Square End Mills for Keyways in Rotary Shafts

Commonly used to make keyways in rotary shafts, these tools are used to create a precise fit. They are high-speed steel for use in most material, such as aluminum, brass, bronze, iron, and steel. All are center cutting, making them good for plunge cuts. They have two flutes for maximum chip clearance.

	Mill
	Dia.	Dia. Tolerance	Shank Dia.	Lg. of Cut	Overall Lg.	Flute Spacing	Helix Angle	For Use On	End Mill Type	Cut Style	Mfr.		Each
Uncoated High-Speed Steel







				2 Flutes

				5/8"	0.0000" to 0.0010"	5/8"	1 5/16"	3 7/16"	Equal	30°	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Center Cutting	Square	Brubaker Tool	8857A67	000000


				3/4"	0.0000" to 0.0010"	5/8"	1 5/16"	3 7/16"	Equal	30°	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Center Cutting	Square	Brubaker Tool	8857A68	00000

Carbide-Tipped Double-Chamfering End Mills


Double-Chamfering Cut Style

Made of carbide-tipped high-speed steel, these end mills provide a sharper, harder edge at high temperatures than plain high-speed steel. Because they aren’t as brittle as solid carbide, they can be used in less rigid setups, such as manual milling machines. The teeth are angled in two directions so you can make top and bottom chamfers without having to flip the workpiece.

Uncoated—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—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.

Titanium Carbon Nitride (TiCN) Coated—Titanium carbon nitride (TiCN)-coated end mills have a hard, smooth finish that resists chipping and wear and prevents material from accumulating on the cutting edge. They’re especially good for use in aluminum. 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—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.

	Mill
	Dia.	Thk.	Shank Dia.	Lg. of Cut	Overall Lg.	For Use On	Cut Style	Mfr.		Each
Uncoated







				90° Cutting Angle

				1 1/2"	9/16"	5/8"	9/16"	3 7/16"	Brass, Bronze, Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Double Chamfering	Whitney Tool	5115N106	0000000


				Titanium Nitride (TiN) Coated







								90° Cutting Angle

								1 1/2"	9/16"	5/8"	9/16"	3 7/16"	Brass, Bronze, Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Double Chamfering	Whitney Tool	5115N119	000000


								Titanium Carbon Nitride (TiCN) Coated







												90° Cutting Angle

												1 1/2"	9/16"	5/8"	9/16"	3 7/16"	Brass, Bronze, Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Double Chamfering	Whitney Tool	5115N133	000000


												Aluminum Titanium Nitride (AlTiN) Coated







																90° Cutting Angle

																1 1/2"	9/16"	5/8"	9/16"	3 7/16"	Brass, Bronze, Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Double Chamfering	Whitney Tool	5115N146	000000

Carbide-Tipped T-Slot End Mills

Made of carbide-tipped high-speed steel, these end mills provide a sharper, harder edge at high temperatures than plain high-speed steel. Because they aren’t as brittle as solid carbide, they can be used in less rigid setups, such as manual milling machines. They're often used to create slots in machine tool tables, indexing tables, and other workholding surfaces.

		Mill			Neck
	For T-Slot Bolt Size	Dia.	Thk.	Shank Dia.	Dia.	Lg.	Lg. of Cut	Overall Lg.	For Use On	Mfr.		Each
Uncoated



		1/2"	31/32"	25/64"	3/4"	0.531"	63/64"	25/64"	3 7/16"	Brass, Bronze, Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Whitney Tool	4652N14	0000000


		Titanium Nitride (TiN) Coated



				1/2"	31/32"	25/64"	3/4"	0.531"	63/64"	25/64"	3 7/16"	Brass, Bronze, Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Whitney Tool	4652N24	000000


				Titanium Carbon Nitride (TiCN) Coated



						1/2"	31/32"	25/64"	3/4"	0.531"	63/64"	25/64"	3 7/16"	Brass, Bronze, Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Whitney Tool	4652N34	000000


						Aluminum Titanium Nitride (AlTiN) Coated



								1/2"	31/32"	25/64"	3/4"	0.531"	63/64"	25/64"	3 7/16"	Brass, Bronze, Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	Whitney Tool	4652N44	000000

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.

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
	Dia.	Dia. Tolerance	Shank Dia.	Lg. of Cut	Overall Lg.	Flute Spacing	Helix Angle	For Use On	End Mill Type	Cut Style	Mfr.		Each
Uncoated High-Speed Steel







				2 Flutes

				5/8"	0.000" to 0.001"	5/8"	1 5/16"	3 7/16"	Equal	30°	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Center Cutting	Square	Brubaker Tool	3051A24	000000


				11/16"	0.000" to 0.001"	5/8"	1 5/16"	3 7/16"	Equal	30°	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Center Cutting	Square	Brubaker Tool	3051A46	00000
				3/4"	0.000" to 0.001"	5/8"	1 5/16"	3 7/16"	Equal	30°	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Center Cutting	Square	Brubaker Tool	3051A49	00000


				Titanium Nitride (TiN)-Coated High-Speed Steel







								2 Flutes

								5/8"	0.000" to 0.001"	5/8"	1 5/16"	3 7/16"	Equal	30°	Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Tool Steel	Center Cutting	Square	Brubaker Tool	8949A24	00000


								11/16"	0.000" to 0.001"	5/8"	1 5/16"	3 7/16"	Equal	30°	Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Tool Steel	Center Cutting	Square	Brubaker Tool	8949A842	00000
								3/4"	0.000" to 0.001"	5/8"	1 5/16"	3 7/16"	Equal	30°	Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Tool Steel	Center Cutting	Square	Brubaker Tool	8949A42	00000