Cleveland C11645 Jobber Drill Bit Letter Q 0.332 in Hss

Product Description

The CLEVELAND C11645 is a jobber-length drill bit sized to Letter Q (0.3320 inches) and designed for general-purpose drilling in metal fabrication, maintenance, and production environments. Built from high-speed steel (HSS) with a bright, uncoated finish, it runs a 135-degree split point that reduces walking and lowers the thrust needed to start a hole. Two spiral flutes clear chips efficiently over a 3.4375-inch flute length. The straight-cylindrical shank seats securely in standard drill chucks. This bit meets NAS 907 Type B specifications and carries a heavy-duty grade rating, making it a reliable choice for licensed tradespeople and production machinists.

The C11645 is suited for drilling aluminum and similar non-ferrous and ferrous workpiece materials in both shop and field settings. Its jobber-length profile — 4.75 inches overall — provides the reach needed for most standard drilling operations without sacrificing rigidity. The regular spiral and tapered web configuration with web thinning help maintain cutting efficiency even as the bit wears into harder stock. It is commonly used in HVAC fabrication, plumbing rough-in, electrical panel work, and general mechanical assembly where accurate, repeatable hole sizing is required.

Key Features

• Letter Q size: 0.3320-inch diameter with a tolerance of -0.0010 to 0.0000 inches
• 135-degree split point reduces bit walking and lowers feed pressure at hole start
• High-speed steel construction with bright uncoated finish for use across a wide range of materials
• Web-thinned, tapered web configuration improves chip clearance and cutting efficiency
• Meets NAS 907 Type B specification — heavy-duty grade rating
• Two spiral flutes over 3.4375 inches provide consistent chip evacuation

Compatibility

Designed as a standard jobber-length drill bit compatible with any drill chuck accepting a 0.3320-inch straight-cylindrical shank; primary workpiece material designation is aluminum per supplier specifications.

Installation Notes

Install in a keyed or keyless drill chuck and verify the shank is fully seated before operation. Secure the workpiece with a clamp or vise — never hold freehand when drilling metal. Apply cutting fluid when drilling ferrous materials to extend bit life and maintain hole tolerance. Follow applicable shop safety standards and PPE requirements when operating rotary cutting tools.