Hertel 74131384 Screw Machine Drill Bit 5/64 in Cobalt

Product Description

The HERTEL 74131384 is a screw machine length drill bit designed for short-hole drilling applications where rigidity and precision entry are critical. Built from cobalt tool steel and finished with a TiAlN coating, this bit handles harder workpiece materials and elevated cutting temperatures better than standard high-speed steel. The split point geometry at 135 degrees reduces walking on entry and lowers the thrust force required to start the cut. At 1-11/16 inches overall length, the stub format keeps deflection minimal in tight clearance setups. Metalworkers, machinists, and maintenance technicians use this bit in drill presses, CNC machining centers, and hand-held power drills.

This drill bit is suited for production and maintenance drilling in metals including stainless steel, hardened steel, cast iron, and other difficult-to-machine alloys where heat buildup shortens standard bit life. The short overall length makes it a practical choice for drill press work and fixtures where spindle-to-work clearance is limited. The straight-cylindrical shank seats directly in standard drill chucks without adapters. Each package contains one bit, sold individually with a minimum order quantity of 12 units.

Key Features

• Cobalt tool steel construction for improved heat resistance and hardness over standard HSS
• TiAlN coating extends surface life and reduces friction during cutting
• 135-degree split point reduces drill walk and decreases required entry thrust
• Web-thinned parallel web reduces cutting resistance through the chisel edge
• Screw machine length at 1-11/16 inches overall for improved rigidity in tight setups
• Right-hand spiral flute clears chips efficiently during through and blind hole drilling

Compatibility

Designed as a direct-fit replacement for standard screw machine length drill bits with a straight-cylindrical shank in 5/64 inch diameter, compatible with any drill chuck accepting that shank geometry.

Installation Notes

Always secure the workpiece firmly before drilling and confirm the chuck is tightened fully before operation. Appropriate cutting fluid or coolant is recommended when drilling hardened or stainless alloys to preserve coating life. Inspect the cutting edges before each use and replace bits showing chipping or excessive wear to maintain hole accuracy and avoid workpiece damage.