Chicago-latrobe 48905 Screw Machine Drill Bit 5/64 in Lh

Product Description

The CHICAGO-LATROBE 48905 is a screw machine length drill bit designed for left-hand cutting in a wide range of general-purpose drilling applications. Built from high speed steel with a bright, uncoated finish, it measures 5/64 inch (0.0781 inches) in diameter and carries an overall length of 1-11/16 inches. The 118-degree standard point angle and two-flute spiral configuration deliver clean entry and efficient chip evacuation. The web-thinned, parallel web design reduces thrust requirements at the point. This bit fits standard straight-cylindrical chucks and is suited for use by machinists, maintenance technicians, and trade professionals working in production or field environments.

The 48905 is built for drilling into non-ferrous and soft materials including aluminum, copper, magnesium, thermoplastics, wood, and slate. Its screw machine length profile provides added rigidity compared to jobber-length bits, making it well suited for close-tolerance work in drill presses, CNC machines, and hand-held equipment where shorter bit overhang improves accuracy. The left-hand cutting direction makes this bit particularly useful for removing broken fasteners or working in reverse-spindle applications.

Key Features

• Left-hand spiral flute cuts in reverse rotation for broken-fastener extraction and reverse-spindle use
• 5/64 inch diameter with a tight tolerance of +0.0000 to -0.0005 inches for close-fit holes
• Web-thinned parallel web reduces point thrust and improves penetration in soft materials
• High speed steel construction provides durability across general-purpose drilling tasks
• Screw machine length body increases rigidity and reduces deflection versus jobber-length bits
• Bright, uncoated finish suited for use without coolant on non-ferrous and soft workpiece materials

Compatibility

Designed as an OEM-style replacement or direct-use drill bit for general-purpose screw machine length applications in straight-cylindrical chuck tooling. Primary workpiece materials include aluminum, copper, magnesium, slate, thermoplastic, and wood.

Installation Notes

Install into a compatible straight-cylindrical chuck and tighten securely before operation. Ensure the drill press or hand tool spindle is set to reverse rotation to engage the left-hand cutting direction correctly. Inspect the bit for damage before each use and replace if chipping or deformation is observed. No coolant feed is required for this bit; use appropriate speeds and feeds for the workpiece material per standard machining practice.