89mm Long Drill Bits | McMaster-Carr

				Shank					Each
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style	Specifications Met	For Use On		Each
Metric
Black-and-Gold Oxide High-Speed Steel
4.7 mm	0.185"	89mm	58.3mm	Round	4.7mm	Split	NAS907 Type B	Steel, Iron, Stainless Steel	000000000	00000
4.8 mm	0.189"	89mm	58.3mm	Round	4.8mm	Split	NAS907 Type B	Steel, Iron, Stainless Steel	000000000	0000

Short-Length Drill Bits

Black Oxide

Titanium Nitride (TiN) Coated

Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than jobbers'- and maintenance-length drill bits.

Black-oxide drill bits produce less friction than uncoated drill bits.

Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated and black-oxide drill bits.

Drill bits with a split point keep centered without a pilot hole.

For technical drawings and 3-D models, click on a part number.

				Shank					Each
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style	Specifications Met	For Use On		Each
Metric
Black-Oxide High-Speed Steel
9.7 mm	0.3819"	89mm	43mm	Round	9.7mm	Split	DIN 1897	Steel, Iron, Stainless Steel	000000000	000000
10.0 mm	0.3937"	89mm	22.9mm	Round	10mm	Split	DIN 1897	Steel, Iron, Stainless Steel	00000000	00000
10.2 mm	0.4016"	89mm	43mm	Round	10.2mm	Split	DIN 1897	Steel, Iron, Stainless Steel	000000000	0000
10.5 mm	0.4134"	89mm	43mm	Round	10.5mm	Split	DIN 1897	Steel, Iron, Stainless Steel	000000000	00000
Titanium-Nitride (TiN) Coated High-Speed Steel
10.0 mm	0.3937"	89mm	43.2mm	Round	10mm	Split	DIN 1897	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic	0000000	00000
10.2 mm	0.4016"	89mm	43.2mm	Round	10.2mm	Split	DIN 1897	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic	0000000	00000
10.5 mm	0.4134"	89mm	26.2mm	Round	10.5mm	Split	DIN 1897	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic	0000000	00000

Short-Length Cobalt Steel Drill Bits

Uncoated

Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than jobbers'-length drill bits. Made of cobalt steel, which has better heat and wear resistance than high-speed steel, they can run up to 25% faster and have a longer tool life.

Drill bits with a split point keep centered without a pilot hole.

For technical drawings and 3-D models, click on a part number.

				Shank					Each
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style	Specifications Met	For Use On		Each
Metric
Uncoated Cobalt Steel
10.0 mm	0.3937"	89mm	23.1mm	Round	10mm	Split	DIN 1897	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel	00000000	000000
10.2 mm	0.4016"	89mm	22.6mm	Round	10.2mm	Split	DIN 1897	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel	00000000	00000

Carbide Drill Bits

Uncoated

Titanium Nitride (TiN) Coated

These jobbers'-length bits have the rigidity and length required for most applications. Made of solid carbide for the highest accuracy and longest tool life, they are harder, stronger, and more wear resistant than high-speed steel, cobalt steel, and carbide-tipped bits. They retain a sharp, hard edge at high temperatures for the best performance on hard and abrasive material. The four-facet point keeps the bit centered without a pilot hole. These bits require rigid toolholding to prevent breakage and should not be used in hand-held drilling applications.

Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated drill bits.

For technical drawings and 3-D models, click on a part number.

				Shank
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style	For Use On		Each
Metric
Uncoated Carbide
7.0 mm	0.2756"	89mm	43.2mm	Round	7mm	Four Facet	Steel, Iron, Stainless Steel, Aluminum, Brass, Bronze, Plastic	0000000	000000
Titanium-Nitride (TiN) Coated Carbide
7.0 mm	0.2756"	89mm	54mm	Round	7mm	Four Facet	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass	0000000	00000

Carbide Drill Bits with Coolant Holes

Holes in these bits allow coolant to be run through the tool for more efficient chip evacuation. Use them in CNC machines with coolant-through technology. Made of solid carbide for the highest accuracy and longest tool life, they are harder, stronger, and more wear resistant than high-speed steel, cobalt steel, and carbide-tipped bits. They retain a sharp, hard edge at high temperatures for the best performance on hard and abrasive material. A titanium aluminum nitride (TiAlN) coating gives them additional wear and temperature resistance. The four-facet point keeps the bit centered without a pilot hole. These bits require rigid toolholding to prevent breakage and should not be used in hand-held drilling applications.

Jobbers'-length drill bits have the rigidity and length required for most applications.

Maintenance-length drill bits are shorter and more rigid than jobbers'-length bits but longer than short-length bits. They hold up better than jobbers' bits when drilling in hard metal. Also known as mechanics' bits.

For technical drawings and 3-D models, click on a part number.

				Shank
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style	No. of Coolant Holes	For Use On		Each
Metric—Maintenance Length
Titanium-Aluminum-Nitride (TiAlN) Coated Carbide
8.5 mm	0.3346"	89mm	47mm	Round	10mm	Four Facet	2	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass	00000000	0000000
9.0 mm	0.3543"	89mm	47mm	Round	10mm	Four Facet	2	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass	00000000	000000
9.5 mm	0.374"	89mm	88.9mm	Round	10mm	Four Facet	2	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass	00000000	000000
10.0 mm	0.3937"	89mm	47mm	Round	10mm	Four Facet	2	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass	0000000	000000

Carbide-Tipped Drill Bits

These jobbers'-length bits have the rigidity and length required for most applications. Made of carbide-tipped steel, which has better wear resistance than high-speed steel and cobalt steel, they maintain a sharper, harder edge at high temperatures for excellent performance on abrasive material, such as plastic. Because they aren’t as brittle as solid carbide bits, they can be used in less rigid setups, such as a hand-held drill.

For technical drawings and 3-D models, click on a part number.

			Shank			Standard Point
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Type	Size	For Use On	Max. Drilling Dp.	Point Angle		Each
Metric
Uncoated Carbide-Tipped Steel
4.2 mm	0.1654"	89mm	Round	4.2mm	Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic	47mm	118°	00000000	000000
4.5 mm	0.1772"	89mm	Round	4.5mm	Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic	47mm	118°	00000000	00000

Smooth-Finish Drill Bits for Wood

Alloy Tool Steel

Bore clean, flat bottom holes in soft wood, veneer, and laminates. The center guide point prevents the bit from wandering. Also known as Forstner bits.

For technical drawings and 3-D models, click on a part number.

				Shank
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style		Each
Metric
Uncoated Alloy Tool Steel
26.0 mm	1.0236"	89mm	76.2mm	Round	10mm	Standard	000000	000000
35.0 mm	1.378"	89mm	76.2mm	Round	10mm	Standard	000000	00000

Optional Extensions
5" Extension for 5/16" Shank Size	0000000	Each	000000
10" Extension for 5/16" Shank Size	0000000	Each	00000

Drill Bits for Carbon Fiber, Fiberglass, and Graphite

Diamond-Coated Brad Point

These jobbers'-length bits have the rigidity and length required for most applications. They are designed to make clean holes in abrasive material. Their point keeps the bit centered without a pilot hole.

Diamond-coated drill bits are highly wear resistant for drilling in abrasive material. They last longer than uncoated bits.

For technical drawings and 3-D models, click on a part number.

				Shank
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style		Each
Metric
Diamond-Coated Carbide
7.0 mm	0.2756"	89mm	54mm	Round	7mm	Brad	0000000	000000

High-Speed Steel Multidiameter Drill Bits

Black Oxide

Steps with progressively larger diameters let you drill a range of sizes with one bit. Also known as step drills.

Black-oxide drill bits produce less friction than uncoated drill bits.

For technical drawings and 3-D models, click on a part number.

					Shank
Drill Bit Size	Decimal Size Equivalent	No. of Sizes	Overall Lg.	For Max. Material Thick.	Type	Size	Point Style	For Use On		Each
Metric
Black-Oxide High-Speed Steel
6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm, 14.0 mm, 16.0 mm, 18.0 mm, 20.0 mm, 22.0 mm, 24.0 mm, 26.0 mm, 28.0 mm, 30.0 mm, 32.0 mm	0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087", 0.7874", 0.8661", 0.9449", 1.0236", 1.1024", 1.1811", 1.2598", 1.378"	15	89mm	2mm	3-Flat	9.53mm	Standard	Steel, Hardened Steel, Tool Steel, Iron, Nickel, Aluminum, Brass, Bronze, Plastic	0000000	0000000

Cobalt Steel Hole-Starting Drill Bits

90° Point Angle

The short flute and length keep these bits straight for accurate placement when starting holes that will be drilled deeper with a longer bit. Also known as spotting drill bits. Cobalt steel bits are heat resistant and maintain their sharp edges when drilling hard material. They are for use in both hand-held drilling and machine-tool applications.

Bits with a 90° point angle are for centering and chamfering holes that will be followed by a smaller drill bit size.

For technical drawings and 3-D models, click on a part number.

				Shank				90° Point Angle
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style	For Use On		Each
Metric
Uncoated Cobalt Steel
10.0 mm	0.3937"	89mm	25.4mm	Round	10mm	Standard	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel	00000000	000000

Metric Size Combination Drill Bit/Round-Shank Reamers for Taper-Pin Holes

The same tool drills and reams holes for taper pins. They have chip breakers on the cutting edge.

For technical drawings and 3-D models, click on a part number.

	Reamer Dia.		Lg.
For Taper Pin Number, mm	(A), mm	(B), mm	Flute, mm	Overall, mm	Number of Flutes	Flute Style	Spiral Direction	Rate of Taper	Point Angle	For Use On		Each
High-Speed Steel
2.5	3.4600	2.3300	56	89	2	Spiral	Right Hand	1" per 50"	118°	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	0000000	000000