Titan Usa SD93639 Cobalt Drill Bit 39/64 Inch Reduced Shank

Product Description

The TITAN USA SD93639 is a reduced shank cobalt drill bit designed for drilling through tough materials including stainless steel, cast iron, and other hard metals. Built to Series 622 specifications, it features a 135-degree split point that reduces walking on contact and requires less feed pressure than a standard 118-degree point. The 39/64 inch cutting diameter is paired with a 1/2 inch reduced shank, allowing it to seat in standard 1/2 inch drill chucks without requiring a larger chuck capacity. The bright, uncoated finish keeps heat dissipation straightforward and allows for easy visual wear inspection. This bit is a standard tool for machinists, pipefitters, and HVAC or plumbing professionals drilling large-diameter holes in structural steel or heavy-gauge material.

The SD93639 is suited for production and maintenance drilling applications where a full-size shank chuck is not available. The 3 inch flute length provides adequate chip clearance for moderate-depth holes, and the 6 inch overall length gives enough reach for most structural and mechanical assembly setups. Common use cases include drilling bolt clearance holes, conduit knockouts in steel enclosures, and pipe flange work. This bit is typically used with a floor-mount or bench drill press, magnetic drill, or heavy-duty corded hand drill with a 1/2 inch chuck.

Key Features

• Cobalt tool material for high heat resistance and extended life in ferrous metals
• 135-degree split point reduces bit walk and lowers required thrust force
• Reduced 1/2 inch shank fits standard 1/2 inch drill chucks from a 39/64 inch cutting diameter
• 3 inch flute length supports chip evacuation in moderate-depth drilling
• Bright, uncoated finish allows clear visual inspection of cutting edge wear
• 2-flute geometry balances chip clearance and cutting edge strength

Compatibility

Designed as an OEM-style replacement or direct-use drill bit compatible with any drill press, magnetic drill, or hand drill equipped with a 1/2 inch chuck capacity.

Installation Notes

This bit is installed by machinists, pipefitters, and trade professionals using standard drill chucks. Secure the reduced shank fully in the chuck before operation and verify chuck key is removed before starting the drill. Use cutting fluid or coolant when drilling hard metals to extend bit life and prevent work hardening of the material. Inspect the cutting edges before each use and replace if chipping or excessive wear is present.