84mm Long Drill Bits | McMaster-Carr

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
8.7 mm	0.3425"	84mm	40mm	Round	8.7mm	Split	DIN 1897	Steel, Iron, Stainless Steel	000000000	00000
9.0 mm	0.3543"	84mm	22mm	Round	9mm	Split	DIN 1897	Steel, Iron, Stainless Steel	00000000	0000
9.1 mm	0.3583"	84mm	40mm	Round	9.1mm	Split	DIN 1897	Steel, Iron, Stainless Steel	000000000	0000
9.2 mm	0.3622"	84mm	40mm	Round	9.2mm	Split	DIN 1897	Steel, Iron, Stainless Steel	000000000	0000
9.3 mm	0.3661"	84mm	40mm	Round	9.3mm	Split	DIN 1897	Steel, Iron, Stainless Steel	000000000	0000
9.5 mm	0.374"	84mm	40mm	Round	9.5mm	Split	DIN 1897	Steel, Iron, Stainless Steel	000000000	0000
Titanium-Nitride (TiN) Coated High-Speed Steel
9.0 mm	0.3543"	84mm	40.6mm	Round	9mm	Split	DIN 1897	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic	000000	00000
9.5 mm	0.374"	84mm	23.7mm	Round	9.5mm	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

Titanium Nitride (TiN) Coated

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.

Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated 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
Uncoated Cobalt Steel
9.0 mm	0.3543"	84mm	22.1mm	Round	9mm	Split	DIN 1897	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel	00000000	000000
Titanium-Nitride (TiN) Coated Cobalt Steel
9.0 mm	0.3543"	84mm	22.1mm	Round	9mm	Split	DIN 1897	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass	00000000	00000

Short-Length Carbide-Tipped Drill Bits

Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than standard-length drill bits. 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.	Max. Drilling Dp.	Type	Size	For Use On	Point Angle		Each
Metric
Uncoated Carbide-Tipped Steel
10.0 mm	0.3937"	84mm	30mm	Round	10mm	Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic	118°	000000000	000000