Hertel 04141156 Cobalt Jobber Drill Bit 3/8 Inch 135 Deg

Product Description

The HERTEL 04141156 is a cobalt jobber-length drill bit designed for heavy-duty holemaking in ferrous and hard materials. It features a 135-degree split point that reduces walking and cutting pressure at startup, eliminating the need for a center punch in most applications. The titanium nitride (TiN) coating extends surface hardness and wear resistance for longer tool life between regrinds. At 5 inches overall length with a 3-5/8-inch flute, it fits standard drill chucks and drill presses used in fabrication, maintenance, and mechanical trade work. Licensed tradespeople and machinists working on structural steel, stainless, and hard alloys will find this a reliable production-grade option.

This bit is suited for use in stationary drill presses, magnetic base drills, and hand-held power drills where a 3/8-inch straight-cylindrical shank is required. The regular spiral and web-thinned, tapered web configuration improve chip evacuation during deep-hole passes in tough materials. It is a common choice in HVAC equipment fabrication, plumbing rough-in drilling, electrical raceway work, and general mechanical service where high-speed steel bits wear too quickly.

Key Features

• Cobalt construction rated for heavy-duty holemaking in hard and abrasive materials
• 135-degree split point reduces thrust and eliminates walk-off on hard surfaces
• TiN coating increases surface hardness and extends tool life
• Web-thinned, tapered web improves chip clearance and reduces torque demand
• Right-hand cutting, regular spiral flute for consistent chip evacuation
• Straight-cylindrical shank fits standard 3/8-inch or larger chucks without adapters

Compatibility

Designed as a jobber-series replacement drill bit for use in any drill press, magnetic base drill, or hand-held power drill accepting a 3/8-inch straight-cylindrical shank.

Installation Notes

Secure the shank fully in the chuck before operation and verify chuck key is removed before starting the machine. Power down and disconnect the drill or press before changing bits. Follow applicable OSHA and shop-safety guidelines for rotating cutting tools, including proper eye protection and workpiece clamping. Coolant-through is not supported on this bit; use cutting fluid applied externally when drilling stainless or high-alloy steel.