Hertel 2386795 Screw Machine Drill Bit 1/4 Inch Hss Tin

Product Description

The HERTEL 2386795 is a screw machine length drill bit designed for high-throughput drilling in metal, plastic, and composite materials. Built from heavy-duty high-speed steel with a titanium nitride (TiN) coating, it delivers extended tool life and reduced friction in demanding production and maintenance environments. The 135-degree split point reduces walking and requires less feed pressure at startup, making it well-suited for work on curved or hardened surfaces. At 2.5 inches overall length with a 1.375-inch flute, this stub-length geometry provides added rigidity compared to jobber-length bits, minimizing deflection in short-reach applications. Licensed machinists, pipefitters, and HVAC sheet metal techs are the primary installers.

This bit is sized at 0.2500 inches (1/4 inch) and fits standard drill chucks, CNC turret setups, and hand drills with a straight cylindrical shank. The right-hand spiral flute and web-thinned, parallel web configuration promote efficient chip evacuation. It is appropriate for both residential and light commercial fabrication work, including drilling holes in electrical enclosures, HVAC equipment panels, plumbing brackets, and mechanical supports. It is sold and packaged as a single unit.

Key Features

• TiN coating increases surface hardness and extends tool life versus uncoated HSS
• 135-degree split point reduces drill walking and lowers required feed pressure
• Web-thinned parallel web improves chip clearance and reduces heat buildup
• Screw machine (stub) length adds rigidity and minimizes deflection
• Straight cylindrical shank fits standard 3-jaw drill chucks and CNC collets
• Heavy-duty HSS grade rated for repetitive use in production settings

Compatibility

Designed as a standard 1/4-inch straight-shank drill bit compatible with any drill chuck or spindle accepting a 0.2500-inch cylindrical shank, including hand drills, drill presses, and CNC turret heads.

Installation Notes

This bit is installed by machinists, sheet metal workers, pipefitters, and HVAC technicians using standard drill chucks or collet holders. Secure the shank fully in the chuck before operation and verify the spindle is stopped before changing bits. Use appropriate cutting fluid or coolant when drilling ferrous metals to preserve coating life, unless machine or application requires dry cutting. Follow applicable shop safety standards and wear appropriate PPE including eye protection during all drilling operations.