Chicago-latrobe 47288 Jobber Drill Bit 5.40 Mm Hss

Product Description

The CHICAGO-LATROBE 47288 is a high speed steel jobber-length drill bit designed for general-purpose drilling in ferrous materials. It carries a 5.40 mm (0.2126 inch) diameter with a standard 118-degree split-point geometry and a web-thinned, tapered web configuration that reduces thrust and improves centering at the start of a cut. The oxide coating provides a light layer of surface protection and helps resist heat buildup during drilling. With a right-hand spiral flute and straight-cylindrical shank, this bit is compatible with standard drill chucks found on portable drills, drill presses, and CNC drilling equipment. It conforms to DIN 338, making it a recognized standard in industrial and maintenance drilling applications.

This drill bit is suited for production and maintenance drilling in cast iron and steel. It performs well in job-shop environments, fabrication work, and field maintenance tasks where a general-purpose bit covering the 5 mm to 6 mm size range is needed. The 93.00 mm overall length and 57.00 mm flute length give it adequate reach for through-hole and blind-hole work in typical stock thicknesses. The straight-cylindrical shank seats cleanly in keyed or keyless chucks without requiring a taper adapter. It is a single-piece package sold individually, with a minimum order quantity of 12 units.

Key Features

• 5.40 mm (0.2126 inch) diameter with a diameter tolerance of -0.0007 to 0.0000 inches for consistent sizing
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• High speed steel construction rated for drilling cast iron and steel
• Oxide coating for surface protection and heat resistance
• Right-hand spiral flute with regular spiral type for efficient chip evacuation
• Conforms to DIN 338 specification for jobber-length drill bits

Compatibility

Designed as a general-purpose jobber drill bit suitable for use in standard drill chucks on portable drills, drill presses, and machining centers; rated for primary workpiece materials of cast iron and steel.

Installation Notes

Secure the straight-cylindrical shank fully in the chuck before operation and verify chuck tightness to prevent slippage. Ensure the workpiece is clamped or fixtured before drilling to prevent movement and bit breakage. Apply appropriate cutting fluid or coolant when drilling steel to extend bit life, noting that this bit does not support coolant-through delivery. Follow the machine manufacturer's recommended speed and feed tables for the workpiece material and bit diameter.