Chicago-latrobe 44274 No. 4 Hss Jobber Drill Bit

Product Description

The CHICAGO-LATROBE 44274 is a jobber length drill bit in No. 4 wire size (0.2090 inch diameter), manufactured from high speed steel with a bright uncoated finish. Part of the 150D Series, this bit features a 118-degree standard point angle, a two-flute regular spiral configuration, and a web-thinned tapered web for improved chip evacuation and reduced thrust during entry. Overall length is 3.75 inches with a 2.5-inch flute length. The straight-cylindrical shank measures 0.2090 inch in diameter and 1.25 inches in length. It is suited for general-purpose drilling in non-ferrous metals and is installed by machinists, maintenance technicians, and trade professionals working with standard drill chucks.

This bit is designed for general-purpose drilling operations in non-ferrous metal workpieces such as aluminum, brass, and copper. The 150D Series jobber length format fits the widest range of bench drills, hand drills, and drill presses found in HVAC, plumbing, and electrical trade work, as well as light manufacturing and maintenance applications. The bright uncoated finish is appropriate for lower-heat, general-purpose use rather than high-speed production environments.

Key Features

• No. 4 wire size, 0.2090 inch decimal diameter for precise sizing in standard drill charts
• 118-degree standard point angle for general-purpose entry on non-ferrous metals
• Web-thinned tapered web reduces thrust and improves chip clearance
• High speed steel construction provides durability across a broad range of general-purpose materials
• Bright uncoated finish suitable for lower-temperature drilling applications
• Conforms to DIN 338 standard for jobber length drill geometry

Compatibility

Designed as a general-purpose jobber length drill bit compatible with any standard drill chuck accepting a 0.2090-inch straight-cylindrical shank, including bench drill presses, cordless drills, and pneumatic drills used in trade and maintenance applications.

Installation Notes

Secure the straight-cylindrical shank firmly in a keyed or keyless chuck before operation and verify chuck capacity accommodates a 0.2090-inch shank. Ensure the workpiece is clamped or fixtured to prevent movement during drilling. Use appropriate cutting fluid or lubrication when drilling non-ferrous metals to extend bit life and improve hole quality. Inspect the cutting edges for wear before each use and replace the bit if the point shows chipping or rounding.