Chicago-latrobe 49721 Taper Length Drill Bit 21/64 in Hss

Product Description

The CHICAGO-LATROBE 49721 is a taper length drill bit designed for general-purpose drilling in metalworking applications. Built from high speed steel with a coated finish, it carries a 118-degree standard point angle and a web-thinned, tapered web configuration for improved penetration and chip clearance. The bit measures 21/64 inch (0.3281 inches) in diameter with an overall length of 6.5 inches and a spiral flute length of 4.125 inches. The straight shank and right-hand cut design make it compatible with standard drill chucks. This is a Series 120 drill bit suited for machinists, maintenance technicians, and fabricators working in metal fabrication and mechanical trades.

This drill bit is intended for drilling into alloy steel, carbon steel, and cast iron in both shop and field environments. The taper length body provides extra reach compared to jobber-length bits, making it practical for deeper holes or applications where standard-length bits fall short. It is a single-piece, non-coolant-through design suitable for conventional drill press and hand-drill setups running standard cutting fluids or dry.

Key Features

• 21/64 inch (0.3281 inches) diameter with diameter tolerance of +0.0000 to -0.0010 inches
• 118-degree standard point angle with web-thinned, tapered web for easier entry
• High speed steel construction rated for alloy steel, carbon steel, and cast iron
• Taper length body — 6.5 inches overall, 4.125-inch flute — for deeper reach than jobber-length bits
• Right-hand spiral flute, straight shank, no threaded shank — fits standard chucks
• Coated finish for improved wear resistance on general-purpose applications

Compatibility

Designed as a general-purpose taper length drill bit for use in alloy steel, carbon steel, and cast iron. Straight shank diameter of 0.3281 inches fits standard 3/8-inch or larger drill chucks.

Installation Notes

Installation is performed by machinists, tool and die technicians, or maintenance mechanics using a drill press or compatible power drill with a suitable chuck. Secure the shank fully in the chuck before operation and verify the workpiece is clamped or fixtured. Apply an appropriate cutting fluid when drilling steel or cast iron to extend tool life and maintain hole tolerance. Inspect the cutting edges for wear or chipping before each use.