Chicago-latrobe 45271 Jobber Drill Bit 4.00 Mm Hss

Product Description

The CHICAGO-LATROBE 45271 is a general-purpose jobber-length drill bit designed for high-volume drilling in metal fabrication, maintenance, and light manufacturing environments. Built from high speed steel (HSS) with a bright, uncoated finish, it carries a 118-degree radial point and a regular spiral flute for reliable chip evacuation. The 4.00 mm diameter measures 0.1575 decimal inches, with an overall length of 75.00 mm (2.9528 inches) and a flute length of 43.00 mm (1.6929 inches). Web-thinned construction reduces point entry resistance. This bit is installed by machinists, maintenance mechanics, and trade professionals working with drill presses, lathes, and hand-held power drills.

This drill bit is engineered for use in aluminum, non-ferrous metals, and similar softer workpiece materials in general-purpose applications. It follows DIN 338 specification, which governs jobber-length drills used widely in production and field service settings. The straight cylindrical shank seats in standard chucks accepting a 4.00 mm (0.1575-inch) shank diameter. It is a single-piece, right-hand cutting tool suited for residential, commercial, and light industrial service work where a compact, standard-length drill is required.

Key Features

• High speed steel construction for general-purpose metal drilling
• 118-degree radial point for self-centering entry on common workpiece materials
• Web-thinned, tapered web design reduces thrust and improves penetration
• Bright uncoated finish — no coating buildup to affect diameter tolerance
• Regular spiral flute promotes efficient chip clearance in through-hole and blind-hole drilling
• Meets DIN 338 specification for consistent jobber-length geometry

Compatibility

Designed as a DIN 338 jobber-length replacement drill bit for use in any standard drill chuck accepting a 4.00 mm straight cylindrical shank, appropriate for aluminum, non-ferrous metals, and general-purpose workpiece materials.

Installation Notes

Installation is performed by machinists or maintenance professionals using a drill press, mill, or handheld power drill with a compatible chuck. Secure the straight shank fully in the chuck before operation and verify chuck key removal before starting the spindle. Use appropriate cutting fluid or lubrication when drilling ferrous or harder non-ferrous materials to extend tool life. Inspect the cutting edges for wear or chipping before each use and replace the bit if point geometry is compromised.