Chicago-latrobe 49758 Taper Length Drill Bit 29/32 in Hss

Product Description

The CHICAGO-LATROBE 49758 is a taper length drill bit designed for precision drilling in metalworking applications. Part of the Series 120 lineup, this bit measures 29/32 inch (0.9062 inches) in diameter with a 118-degree standard point angle and a web-thinned, tapered web configuration that reduces feed force at entry. The overall length is 10 inches with a flute length of 6.125 inches. Manufactured from high speed steel with a coated finish, it is suited for general-purpose production drilling where longer reach than a jobber-length bit is required. Machinists, toolroom technicians, and fabrication shops are the primary users.

The 49758 is intended for drilling alloy steel, carbon steel, and cast iron in shop and production environments. Its straight shank and 0.9063-inch shank diameter allow it to seat in standard drill chucks and machine tool holders. The right-hand spiral flute geometry promotes consistent chip evacuation in through-hole and blind-hole drilling. Taper length geometry provides added rigidity compared to standard jobber bits while still reaching deeper than a screw-machine-length drill, making it a practical choice for fixture work or setups where clearance depth is needed.

Key Features

• 29/32 inch (0.9062 inches) diameter with tolerance of +0.0000 to -0.0012 inches for consistent hole sizing
• 118-degree standard point angle with web-thinned, tapered web for reduced thrust and easier starts
• High speed steel construction with coated finish for improved wear resistance
• Right-hand, regular spiral flute for efficient chip evacuation in steel and cast iron
• 10-inch overall length with 6.125-inch flute length for extended reach applications
• Straight shank at 0.9063 inches diameter fits standard chucks without adapters

Compatibility

Designed for use on alloy steel, carbon steel, and cast iron workpieces. Compatible with standard drill chucks and machine tool holders accepting a 0.9063-inch straight shank. Suited for general-purpose drilling in drill press, lathe, and milling machine setups.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom personnel familiar with rotating cutting tool safety. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit from the chuck. Secure the shank fully in the chuck jaws and verify concentricity before running at speed. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection when drilling steel or cast iron.