Hertel 74131004 Cobalt Screw Machine Drill Bit Size 48

Product Description

The HERTEL 74131004 is a cobalt screw machine length drill bit designed for high-speed drilling in tough materials including hardened steels, stainless steel, and heat-resistant alloys. Manufactured from cobalt high-speed steel (HSCO), it delivers superior heat resistance compared to standard HSS bits, making it well suited for demanding production and maintenance environments. The 135-degree split point geometry reduces walking and thrust, enabling cleaner entry without a center punch. At 1-11/16 inches overall length, this stub-length bit provides added rigidity to minimize deflection in short-reach drilling applications. Wire gauge size 48 corresponds to a decimal diameter of 0.0760 inches. Installation is handled by qualified machinists, tool-and-die technicians, and maintenance professionals.

The HERTEL 74131004 is designed for screw machine operations, CNC drilling, and general-purpose production drilling where a short, rigid bit is required. The stub length format reduces chatter and overhang in turret lathes, screw machines, and drill presses. The regular spiral flute and parallel web configuration support consistent chip evacuation in ferrous and non-ferrous metals. This bit does not support coolant-through operation and is intended for use with external cutting fluid or dry cutting where appropriate for the material.

Key Features

• Cobalt (HSCO) construction provides superior heat and wear resistance for drilling hard and abrasive materials
• 135-degree split point reduces bit walking and lowers required thrust force at entry
• Screw machine (stub) length of 1-11/16 inches overall increases rigidity and reduces deflection
• Web-thinned geometry with parallel web configuration supports efficient chip clearance
• Right-hand cutting, regular spiral flute with 11/16-inch flute length
• Straight cylindrical shank for use in standard drill chucks and collets
• Straw finish on cobalt substrate; no additional coating applied

Compatibility

Designed as an OEM-style replacement or direct substitution for wire gauge size 48 screw machine length drill bits in standard drill chucks and collets accepting a straight cylindrical shank in the 0.0760-inch diameter range.

Installation Notes

Installation is performed by machinists or maintenance technicians using a standard drill chuck or collet system matched to the straight shank diameter. Ensure the machine spindle is fully stopped and locked out before changing tooling. Confirm chuck runout is within acceptable tolerance for the diameter being drilled, as excessive runout at small diameters accelerates wear and increases breakage risk. Apply appropriate cutting fluid for the material being drilled unless dry cutting is specified.