Chicago-latrobe 49757 Taper Length Drill Bit 57/64 in Hss

Product Description

The CHICAGO-LATROBE 49757 is a taper length drill bit designed for precision hole-making in demanding shop and field applications. Built from high speed steel and finished with a protective coating, this bit measures 57/64 inch (0.8906 inches) in diameter with a 118-degree standard point angle. The overall length is 10 inches, with a 6.125-inch spiral flute and a straight shank. Web-thinned construction reduces thrust at the cutting tip, making it suitable for production drilling where feed rates and tool life both matter. Installed by machinists, tool-and-die technicians, and maintenance trades.

The 49757 is rated for general-purpose drilling in alloy steel, carbon steel, and cast iron. The taper length body gives more reach than a jobber-length bit without sacrificing rigidity, making it well suited for deep-hole work on mill tables, drill presses, and CNC setups where a standard-length bit falls short. The right-hand spiral flute evacuates chips efficiently during through-hole and blind-hole operations. Series 120 construction follows consistent diameter tolerances of +0.0000 to -0.0012 inches, supporting repeatable hole quality across production runs.

Key Features

• 57/64 inch (0.8906 inches) diameter with tight tolerance of +0.0000 to -0.0012 inches
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• High speed steel construction for general-purpose metal cutting
• Coated finish extends cutting life and reduces friction during drilling
• 6.125-inch spiral flute length provides effective chip clearance in deeper cuts
• Straight shank at 0.8906 inches diameter fits standard drill chucks and collet holders

Compatibility

Designed for drilling alloy steel, carbon steel, and cast iron on drill presses, milling machines, and CNC equipment with standard straight-shank toolholders or drill chucks accommodating a 57/64 inch shank diameter.

Installation Notes

Installation is performed by machinists or maintenance technicians familiar with drill press or machine tool operation. Secure the shank fully in the chuck or collet before applying power, and verify that the workpiece is clamped or fixtured to prevent movement during drilling. Use cutting fluid appropriate for the workpiece material to manage heat and extend tool life. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point shows visible damage.