Chicago-latrobe 50602 Extra Length Drill Bit Hss 12in

Product Description

The CHICAGO-LATROBE 50602 is a Series 120X extra length drill bit designed for long-reach drilling in cast iron and steel. The bit measures 0.5781 inches in diameter with a 12-inch overall length and a 9-inch spiral flute, giving it the reach needed in deep-hole and extended-access applications where standard-length bits fall short. The 118-degree notched point and web-thinned, tapered web construction reduce entry force and improve chip evacuation. Made from high speed steel with an oxide finish, it holds up in production and maintenance drilling environments. Two right-hand spiral flutes handle chip clearance in ferrous materials. This is a general purpose bit used by machinists, millwrights, pipefitters, and maintenance trades.

The 50602 fits applications requiring extended reach beyond what a jobber-length or screw-machine-length bit can provide. It is suited for drilling through structural steel, cast iron housings, pipe flanges, and similar ferrous workpieces where the drill must reach deep into a bore or clear a significant stack of material. The straight cylindrical shank seats in standard drill chucks and machine spindles without adapters. Long-reach drilling in tight mechanical assemblies, HVAC equipment frames, pump housings, and electrical enclosures are common use cases.

Key Features

• Extra length design: 12-inch OAL and 9-inch flute length for deep-hole and long-reach access
• High speed steel construction with oxide finish for wear resistance in ferrous materials
• 118-degree notched point reduces walking and cutting force at entry
• Web-thinned, tapered web improves chip flow and reduces thrust in cast iron and steel
• Right-hand, regular spiral flute geometry for consistent chip evacuation
• Diameter tolerance of +0.0000 to -0.0012 inches for close-tolerance hole sizing

Compatibility

Designed for use in cast iron and steel workpieces. Compatible with standard drill chucks and machine spindles accepting a 0.5781-inch straight cylindrical shank. Part of the CHICAGO-LATROBE Series 120X extra length drill bit family.

Installation Notes

Install and remove drill bits only with the machine powered off and the spindle fully stopped. Secure the straight shank firmly in the chuck before operation to prevent slippage under load. Long-reach bits are more susceptible to deflection and chatter at high feed rates; use appropriate feed and speed settings for the workpiece material. Follow applicable shop safety standards and wear appropriate eye protection during drilling operations.