Cleveland C11646 Jobber Drill Bit Letter R Hss Split Point

Product Description

The CLEVELAND C11646 is a jobber-length drill bit sized to letter R, equivalent to 0.3390 inches in diameter, designed for general-purpose drilling in metal fabrication and maintenance applications. Built from high-speed steel with a bright uncoated finish, this bit features a 135-degree split point that reduces walking and requires no center punch on most surfaces. The tapered web and web-thinned geometry reduce thrust load at the cutting edge. At 4.75 inches overall length with a 3.4375-inch spiral flute, it fits standard drill chucks and drill presses used daily in trade and production environments. It meets NAS 907 Type B standards and is rated heavy duty for consistent performance in repetitive use.

The C11646 is suited for drilling aluminum as its primary workpiece material, though the high-speed steel construction handles a broad range of non-hardened metals and plastics encountered in mechanical, HVAC, plumbing, and electrical trade work. The straight-cylindrical shank seats securely in keyless or keyed drill chucks without slipping. The regular spiral and right-hand cut direction make this a standard replacement or stocking bit for service vans and shop drill presses. Series 2222 designation identifies it within the CLEVELAND heavy-duty jobber line for easy reorder.

Key Features

• Letter R size — 0.3390 inches diameter for precise hole sizing
• 135-degree split point reduces bit walking and lowers required thrust force
• Web-thinned, tapered web geometry for reduced cutting resistance
• High-speed steel construction handles aluminum and non-hardened metals
• Bright uncoated finish allows easy visual inspection of cutting edge condition
• Meets NAS 907 Type B specification for heavy-duty jobber-length drills

Compatibility

Designed as an OEM-style replacement or stock bit for standard 3-jaw drill chucks accepting a 0.3390-inch straight-cylindrical shank, compatible with drill presses, hand drills, and right-angle drills used in trade applications.

Installation Notes

Licensed trades including HVAC technicians, plumbers, and electricians install jobber-length drill bits into keyed or keyless chucks — ensure the chuck is fully tightened and the drill is powered off before changing bits. Always wear eye protection when drilling metal. For aluminum and softer materials, use a cutting fluid or lubricant to extend bit life and improve hole finish. Inspect the cutting edges before each use and replace bits that show chipping or excessive wear to avoid workpiece damage.