Cleveland C09729 Extra Length Drill Bit 0.4688 in Hss

Product Description

The CLEVELAND C09729 is an extra length high-speed steel drill bit designed for deeper drilling and long-reach applications where standard-length bits fall short. It features a 0.4688-inch diameter, a 118-degree standard point angle, and a web-thinned, tapered web construction that reduces cutting resistance at the tip. The oxide finish provides basic lubricity and corrosion resistance during operation. With a 10-inch overall length and a 7.5-inch spiral flute, this bit gives machinists and tradespeople the reach needed to bore through thick stock or deep blind holes in a single pass. It is sized to Series 950E specifications and carries a right-hand cutting direction.

This drill bit is suited for production and maintenance drilling in cast iron and steel workpieces where standard-length tooling cannot reach. Typical applications include fabrication shops, mechanical contractors, ironworkers, and maintenance technicians performing deep-hole drilling in structural members, heavy plate, or industrial machinery components. The straight-cylindrical shank accepts standard drill chucks without adapters, making it compatible with most drill presses, handheld drills, and magnetic drills commonly found in the trade.

Key Features

• 0.4688-inch diameter with a tight tolerance of +0.0000 to -0.0010 inches for consistent hole sizing
• 10-inch overall length with 7.5-inch flute length for deep-reach and long-reach drilling
• 118-degree standard point angle with web-thinned, tapered web for reduced entry force
• High-speed steel construction with oxide finish for general-purpose durability
• Regular spiral flute with right-hand cutting direction for efficient chip evacuation
• Primary workpiece materials: cast iron and steel

Compatibility

Designed as an OEM-style general-purpose extra length drill bit suitable for use in cast iron and steel. Conforms to ASME B94.11M and ANSI standards. Straight-cylindrical shank fits standard drill chucks without modification.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or tradespeople familiar with rotary cutting tools. Secure the workpiece and ensure the drill chuck is properly tightened before operation. Cutting fluid or lubricant is recommended when drilling steel to extend tool life and manage heat buildup. Follow all applicable shop safety protocols and consult OSHA and applicable ANSI standards for cutting tool handling and guarding requirements.