Chicago-latrobe 46216 Jobber Drill Bit Letter E 1/4 in Hss

Product Description

The CHICAGO-LATROBE 46216 is a jobber-length twist drill bit in the Series 150C line, sized at Letter E (1/4 inch, 0.2500 inch decimal). It is made from high speed steel with a bright, uncoated finish and features a standard 118-degree point angle with a slow spiral, two-flute design. The straight-cylindrical shank measures 1/4 inch in diameter. With an overall length of 4 inches and a flute length of 2.75 inches, this bit is suited for general-purpose drilling in a range of materials. Licensed trades and metalworking shops use this style of bit for production and maintenance drilling tasks.

The 46216 is rated for general-purpose drilling with a primary application in brass and bronze workpieces, though its HSS construction makes it functional across a broad range of softer metals and plastics. The web-thinned, tapered-web construction reduces thrust force at the point, which is a benefit when working with non-ferrous materials. This bit does not support coolant-through delivery. It is sold individually and is a common shop consumable stocked by HVAC, plumbing, and general mechanical trades for field and bench work.

Key Features

• Letter E size (1/4 inch / 0.2500 inch decimal) straight-cylindrical shank for standard chuck compatibility
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Slow spiral, two-flute design optimized for brass and bronze chip evacuation
• High speed steel construction with bright (uncoated) finish for general-purpose durability
• 4-inch overall length with 2.75-inch flute length — standard jobber proportions
• Right-hand cut; no coolant-through requirement

Compatibility

Designed as a general-purpose jobber-length drill bit suitable for use in standard three-jaw drill chucks accepting a 1/4-inch straight-cylindrical shank. Primary workpiece materials are brass and bronze per Series 150C specifications.

Installation Notes

This bit is installed in any compatible 1/4-inch or larger keyed or keyless chuck. Ensure the drill press or hand drill is powered off and the chuck is fully tightened before operation. Use appropriate cutting fluid when drilling non-ferrous metals to extend bit life, even though coolant-through is not supported by this design. Dispose of worn bits per shop safety protocols and inspect the point for chipping before each use.