Chicago-latrobe 47300 Jobber Drill Bit 6.4mm Hss Oxide

Product Description

The CHICAGO-LATROBE 47300 is a jobber length drill bit designed for general-purpose drilling in ferrous metals including cast iron and steel. The bit measures 6.4 mm (0.2520 inches) in diameter with an overall length of 101 mm (3.976 inches) and a flute length of 63 mm (2.480 inches). It is manufactured from high speed steel with an oxide coating that reduces friction and helps extend service life in production and maintenance drilling applications. The 118-degree standard point angle and web-thinned, tapered web geometry make it suitable for a wide range of shop and field drilling tasks. A licensed machinist, maintenance technician, or general tradesperson typically deploys this bit for metal fabrication, mechanical repair, and structural drilling work.

This drill bit is suited for use in residential, commercial, and industrial settings wherever ferrous metal drilling is required. It performs in hand drills, drill presses, and machine tool spindles. Primary workpiece materials include cast iron and steel, making it a practical choice for HVAC installers, plumbers, electricians, and pipefitters drilling through structural steel, equipment housings, and mounting hardware. It conforms to DIN 338, a widely recognized standard for jobber length twist drills, ensuring dimensional consistency and interchangeability across tooling setups.

Key Features

• High speed steel construction with oxide coating for reduced friction and extended service life in steel and cast iron
• 118-degree standard point angle for general-purpose metal drilling without specialized point grinding
• Web-thinned tapered web reduces thrust and improves chip evacuation at entry
• Right-hand cut with regular spiral flute for positive chip clearing in through-hole and blind-hole applications
• Straight-cylindrical shank fits standard drill chucks without adapters
• Conforms to DIN 338 for consistent dimensional tolerances across production runs

Compatibility

Designed as a general-purpose jobber length twist drill compatible with standard 3-jaw and keyless drill chucks sized to accept a 0.2520-inch straight-cylindrical shank. Suitable for use in hand drills, drill presses, and CNC drilling spindles. Intended for drilling cast iron and steel workpieces.

Installation Notes

Secure the straight shank firmly in the chuck before operation and verify that workpiece material is adequately clamped to prevent rotation during drilling. Power down the drill or press and disconnect power before changing bits. Use cutting fluid or coolant when drilling steel in production settings to maintain edge life, though this bit is rated for dry drilling in general-purpose applications. Dispose of worn bits according to local shop safety practices and do not regrind unless proper point geometry can be maintained.