Chicago-latrobe 47320 Hss Jobber Drill Bit 8.10 Mm

Product Description

The CHICAGO-LATROBE 47320 is a high-speed steel (HSS) jobber-length drill bit ground to an 8.10 mm (0.3189 inch) diameter with a standard 118-degree split point. The bit carries a black oxide coating that reduces friction and provides light corrosion resistance during storage and use. At 117.00 mm overall length with a 75.00 mm flute length, it fits the jobber-length category defined by DIN 338. The web-thinned, tapered web design reduces the force required to start a hole and improves chip evacuation. General-purpose machinists, maintenance mechanics, and metalworking technicians are the primary installers.

This drill bit is rated for general-purpose drilling in cast iron and steel. It suits production floor work, maintenance and repair operations, and fabrication shops where standard jobber-length tooling is the norm. The straight cylindrical shank seats directly in keyless or keyed drill chucks without an adapter. The right-hand cutting direction and regular spiral flute geometry are compatible with conventional drill presses, hand-held power drills, and CNC drilling operations running standard feeds and speeds for HSS tooling in ferrous materials.

Key Features

• 8.10 mm (0.3189 inch) diameter with a diameter tolerance of -0.0010 to 0.0000 inches for consistent hole sizing
• 118-degree standard point angle suited to general-purpose ferrous drilling
• Black oxide finish reduces friction and provides corrosion resistance during storage
• Web-thinned, tapered web reduces thrust requirements and improves chip flow
• DIN 338 specification — Series 150 jobber length, 117.00 mm overall
• Straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a general-purpose jobber-length drill bit for use in cast iron and steel workpieces. Conforms to DIN 338 specification for jobber-length HSS drill bits in the 8.00 mm to 9.00 mm diameter range.

Installation Notes

Install and remove drill bits only after the spindle has come to a complete stop and power has been isolated from the machine. Seat the straight shank fully and evenly in the chuck before tightening to prevent runout. Use cutting fluid or coolant appropriate for the workpiece material to extend tool life when drilling steel. Inspect the cutting edges and web before each use and replace the bit if chipping or excessive wear is present.