Cleveland C73440 Jobber Length Drill Bit Wire 12 Hss

Product Description

The CLEVELAND C73440 is a jobber-length drill bit in wire gauge size 12, with a decimal diameter of 0.1890 inches, manufactured from high-speed steel with a bright uncoated finish. It features a 118-degree split-point tip and a regular spiral flute geometry, producing clean, accurate entry holes with minimal walking on startup. The straight-cylindrical shank accepts standard drill chucks without adapters. With an overall length of 3.5 inches and a flute length of 2.3125 inches, this is a general-purpose bit suited for production and maintenance drilling tasks. It is rated as heavy-duty grade and meets NAS 907 Type A specification. Licensed machinists, maintenance technicians, and fabricators are the primary users.

This bit is designed for drilling aluminum as its primary workpiece material, though the high-speed steel construction and standard jobber geometry also handle a range of soft to medium ferrous and non-ferrous materials in typical shop and field environments. The wire size 12 diameter falls within the 0.1500 to 0.2000 inch range common in precision fastener clearance, tapping pilot, and light structural applications. It is packaged as a single bit and sold in multiples of 12, making it suitable for shop restocking or toolcrib replenishment.

Key Features

• Wire gauge size 12 with 0.1890 inch decimal diameter and tight tolerance of -0.0007 to 0.0000 inches
• 118-degree split point with web-thinned, tapered web for reduced thrust and self-centering starts
• High-speed steel construction rated heavy-duty grade for extended tool life
• Bright uncoated finish compatible with cutting fluids and suitable for aluminum and non-ferrous materials
• Regular spiral flute with right-hand cut for standard drill press, hand drill, and CNC spindle use
• Meets NAS 907 Type A specification for consistent dimensional conformance

Compatibility

Designed as an OEM-style jobber drill bit conforming to NAS 907 Type A standards, suitable for use in any standard drill chuck accepting a 0.1890 inch straight-cylindrical shank across drill presses, hand drills, and CNC drilling equipment.

Installation Notes

Installation is performed by machinists, maintenance technicians, or fabricators using a standard drill chuck sized for a straight-cylindrical shank. Ensure the workpiece is securely clamped and the machine is at a full stop before changing or seating the bit. Apply appropriate cutting fluid when drilling aluminum or other non-ferrous metals to extend tool life and improve hole finish. Inspect the split point for wear or chipping before each use, as a damaged tip will reduce positional accuracy and increase thrust load.