Deep Hole Drills | McMaster-Carr

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1.0-13.0 mm (increments of 0.5 mm)

1/16"-1/2" (increments of 1/64")

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1,643 Products

About Drill Bits

Compare material, finish, length class, and decimal size equivalents.

General Purpose Drill Bits

Extended-Length Drill Bits

Short-Flute Extended-Length Drill Bits

The short flutes provide increased rigidity for drilling straighter holes than standard extended-length drill bits.

Extended-Length Chip-Clearing Drill Bits

Chip-Clearing Drill Bits

These jobbers'-length bits have the rigidity and length required for most applications.

Chip-Clearing Cobalt Steel Drill Bits

The parabolic spiral flutes lift chips out of the hole, reducing clogging and improving coolant flow.

Extended-Length Cobalt Steel Drill Bits

Short-Flute Extended-Length Cobalt Steel Drill Bits

The short flutes provide increased rigidity for drilling straighter holes than standard extended-length drill bits.

Extended-Length Carbide-Tipped
Drill Bits with Coolant Holes

Drill long, straight holes with these bits. Channels in the bit allows coolant to flow through the tool for more efficient chip evacuation. Also known as gun drills.

Extended-Length Carbide-Tipped Drill Bits

Short-Flute Extended-Length
Carbide-Tipped Drill Bits

The short flutes provide increased rigidity for drilling straighter holes than standard extended-length drill bits.

Chip-Clearing Carbide Drill Bits

The parabolic spiral flutes lift chips out of the hole, reducing clogging and improving coolant flow.

Extended-Length 1/2" Diameter
Reduced-Shank Drill Bits

Access hard-to-reach spots and drill deep holes.

Cobalt Steel Drill Bits for Stainless Steel and Nickel

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.

Chip-Clearing Drill Bit Sets

Designed to lift chips out of the hole, these bits reduce clogging and improve coolant flow.

General Purpose Drill Bits

Extended-Length Drill Bits

Short-Flute Extended-Length Drill Bits

Extended-Length Chip-Clearing Drill Bits

Chip-Clearing Drill Bits

Chip-Clearing Cobalt Steel Drill Bits

Extended-Length Cobalt Steel Drill Bits

Short-Flute Extended-Length Cobalt Steel Drill Bits

Extended-Length Carbide-TippedDrill Bits with Coolant Holes

Extended-Length Carbide-Tipped Drill Bits

Short-Flute Extended-LengthCarbide-Tipped Drill Bits

Chip-Clearing Carbide Drill Bits

Extended-Length 1/2" DiameterReduced-Shank Drill Bits

Cobalt Steel Drill Bits for Stainless Steel and Nickel

Cobalt Steel Drill Bits for Stainless Steel and Nickel

Chip-Clearing Drill Bit Sets

Chip-Clearing Drill Bit Sets

Extended-Length Carbide-Tipped
Drill Bits with Coolant Holes

Short-Flute Extended-Length
Carbide-Tipped Drill Bits

Extended-Length 1/2" Diameter
Reduced-Shank Drill Bits