Cleveland C15976 Cobalt Drill Bit 11/32 in 135 Deg

Product Description

The CLEVELAND C15976 is a cobalt jobber-length drill bit designed for demanding metal-cutting applications where standard high-speed steel bits fall short. Built to M42 cobalt steel grade, it carries a 135-degree split point that starts on contact without a center punch and reduces walking on hard surfaces. The oxide coating improves lubrication retention and helps shed heat during extended drilling cycles. At 4.75 inches overall length with a 1.6875-inch flute, this bit is sized for general-purpose jobber work in a standard drill chuck. Licensed HVAC, plumbing, and electrical tradespeople as well as industrial maintenance technicians reach for this bit when cutting through superalloys, stainless, and other hard ferrous materials.

The C15976 is a heavy-duty bit intended for use on superalloys, high-nickel alloys, stainless steel, and similarly hard workpiece materials. Its fast-spiral flute geometry promotes chip evacuation in deep-hole drilling scenarios common to mechanical and process-trade installations. The straight cylindrical shank measures 11/32 inch in diameter, fitting standard three-jaw drill chucks on corded drills, drill presses, and magnetic base drills without an adapter. It conforms to ASME B94.11M dimensional standards and carries an NAS specification designation, making it suitable for work on commercial and light-industrial job sites where material traceability matters.

Key Features

• M42 cobalt steel construction resists heat buildup and maintains cutting edge integrity in hard alloy drilling
• 135-degree split point self-centers on contact and reduces thrust force needed to start the hole
• Fast-spiral flute promotes aggressive chip evacuation in deep or interrupted cuts
• Oxide coating aids lubrication retention and extends bit service life
• Web-thinned, tapered web design lowers cutting resistance and reduces heat at the tip
• Conforms to ASME B94.11M and NAS specification for dimensional consistency

Compatibility

Designed for use in standard 11/32-inch straight-cylindrical-shank drill chucks across corded drills, drill presses, and magnetic base drills. Primary workpiece material designation is superalloy; also suitable for other hard ferrous and high-temperature alloy materials consistent with heavy-duty cobalt-grade tooling.

Installation Notes

Secure the shank fully in the drill chuck before operation and verify chuck key is removed prior to powering the tool. Use a cutting fluid or coolant appropriate for the workpiece material to maximize bit life, particularly when drilling superalloys or stainless steel. Operate at reduced RPM with steady, consistent feed pressure to avoid work-hardening the material or overheating the cutting edge. Inspect the split point for chipping or wear before each use; a damaged point should be resharpened or the bit replaced before returning it to service.