Chicago-latrobe 50741 Extra Length Drill Bit 0.3281in Hss

Product Description

The CHICAGO-LATROBE 50741 is a Series 120X extra length high speed steel drill bit designed for long reach drilling applications. It features a 0.3281-inch diameter with a 12-inch overall length and a 9-inch spiral flute length, giving it the extended reach needed when standard-length bits fall short. The 118-degree notched point with web thinning reduces entry force and improves chip clearance at the cutting edge. An oxide finish provides basic surface protection during use. With a right-hand cutting direction and tapered web configuration, this bit suits trade and industrial professionals who regularly drill through cast iron and steel in constrained or deep-reach setups.

This bit is suited for metal fabrication, mechanical contracting, and maintenance applications where standard-length drills cannot reach the workpiece. Its straight-cylindrical shank fits conventional drill chucks without adapters. The 9-inch flute length supports chip evacuation in deep holes, making it a practical choice when drilling through structural steel, iron castings, or thick plate in field or shop environments. Primary workpiece materials are cast iron and steel.

Key Features

• 0.3281-inch diameter with tight tolerance of +0.0000 to -0.0010 inches for accurate hole sizing
• 12-inch overall length and 9-inch flute length for extended reach drilling
• 118-degree notched point with web thinning reduces thrust and improves bit life on hard metals
• High speed steel construction rated for cast iron and steel cutting
• Oxide finish for basic corrosion and heat resistance during operation
• Straight-cylindrical shank fits standard drill chucks directly

Compatibility

Designed as a general-purpose extra length drill bit for use in standard drill chucks accepting a 0.3281-inch straight-cylindrical shank. Primary workpiece materials listed by the manufacturer are cast iron and steel.

Installation Notes

Install and service by a qualified machinist or trades professional familiar with metal drilling practices. Secure the workpiece fully before drilling and ensure the chuck is tightened to manufacturer specifications before operation. When drilling deep holes, withdraw the bit periodically to clear chips and prevent heat buildup. Always wear appropriate eye protection and follow shop safety protocols when working with HSS drill bits on ferrous materials.