Deep Hole Drill Bits | McMaster-Carr

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1,643 Products

Drill Bit Decimal Size Equivalents

About 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.

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.

Short-Flute Extended-Length
Carbide-Tipped Drill Bits

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

Extended-Length Carbide-Tipped Drill Bits

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.

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.