Chicago-latrobe 47330 Jobber Drill Bit 8.9mm Hss Oxide

Product Description

The CHICAGO-LATROBE 47330 is a jobber length twist drill bit designed for general-purpose hole-making in metalworking applications. Manufactured from high speed steel with an oxide coating, it measures 8.9 mm (0.3504 inches) in diameter and carries a standard 118-degree split point. Overall length is 125 mm (4.921 inches), with a flute length of 81 mm (3.189 inches) and a straight cylindrical shank. The two-flute, right-hand spiral design clears chips efficiently during drilling. Web-thinned construction at the tip reduces the force required to start and advance the cut. This bit conforms to DIN 338 standards and fits the Series 150 lineup from CHICAGO-LATROBE.

The 47330 is suited for production and maintenance drilling in cast iron and steel. It performs in job shop, fabrication, and industrial maintenance environments where a reliable, general-purpose bit is needed for through-holes and blind holes in ferrous materials. The oxide finish provides a degree of lubricity and surface protection. The straight cylindrical shank seats in standard drill chucks without adapters, making it compatible with benchtop drill presses, floor-standing machines, and hand-held electric drills used in professional trades.

Key Features

• 8.9 mm (0.3504 inches) diameter, conforming to DIN 338 jobber length standard
• High speed steel construction for general-purpose metalworking durability
• Oxide coating adds surface lubricity and corrosion resistance
• 118-degree standard point angle with web-thinned tip for easier entry
• Two-flute right-hand spiral with regular helix for efficient chip evacuation
• Straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed for drilling cast iron and steel workpieces. Compatible with any drill press or hand-held drill fitted with a chuck capable of accepting a 0.3504-inch straight cylindrical shank. Conforms to DIN 338 jobber length geometry.

Installation Notes

Secure the shank fully in the drill chuck before operation and verify the chuck key is removed before starting the machine. Use appropriate cutting fluid or coolant when drilling steel to extend tool life and maintain hole quality. Power down and lock out the machine before changing bits or clearing chip buildup. This bit is intended for metalworking use and should be operated by individuals familiar with machine tool safety practices.