Cleveland C72072 Jobber Drill Bit Letter B Hss 4 in

Product Description

The CLEVELAND C72072 is a jobber-length drill bit in Letter B size (0.2380 inches diameter), manufactured from high speed steel with a bright, uncoated finish. It features a 118-degree standard point angle with web thinning for improved center penetration and reduced thrust. The spiral, regular-helix flute geometry clears chips efficiently in a wide range of materials. Designed for general-purpose drilling, this bit is suited for use by machinists, pipefitters, electricians, and maintenance technicians working in shop or field environments. It is compliant with ASME B94.11M and DIN 338 standards.

This drill bit is intended for general-purpose drilling applications in metal, wood, and plastics across residential, commercial, and light industrial settings. The straight-cylindrical shank fits standard three-jaw drill chucks without modification. The 2-3/4 inch flute length supports adequate chip evacuation in moderate-depth holes. With a 4xD flute-to-diameter ratio and right-hand cutting direction, it is well suited for handheld drills and drill press operations alike.

Key Features

• Letter B size — 0.2380 inch diameter with tolerance of -0.0007 to 0.0000 inches for close fits
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• High speed steel construction for durability across general-purpose materials
• Bright, uncoated finish — no coating buildup to alter critical diameter dimensions
• 2-flute regular spiral for balanced chip clearance and cutting stability
• Compliant with ASME B94.11M and DIN 338 dimensional standards

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard three-jaw chuck accepting a 0.2380 inch straight-cylindrical shank, including handheld power drills and drill presses.

Installation Notes

Installed by machinists, electricians, pipefitters, and general maintenance trades using standard drill chucks. Secure the shank fully in the chuck before operation and verify chuck key is removed before powering the tool. Operate at speeds appropriate for the workpiece material and bit diameter — consult published speed-and-feed charts for high speed steel bits at this diameter. Do not exceed the rated capacity of the drill press or handheld tool.