Hertel 2386712 Screw Machine Drill Bit 1/8 in Hss Tin

Product Description

The HERTEL 2386712 is a screw machine length drill bit ground from high-speed steel and finished with a titanium nitride (TiN) coating. It measures 0.125 inches (1/8 inch) in diameter with an overall length of 1.875 inches (1-7/8 inches) and a flute length of 0.875 inches (7/8 inch). The 135-degree split point reduces walking at startup and lowers the thrust required to enter the workpiece. The web-thinned, parallel-web construction keeps cutting action consistent through the full depth of the hole. Machinists, maintenance techs, and trade professionals reach for screw machine length bits when working in tight clearances where a jobber-length bit would not fit.

This bit is suited for drilling in metals, plastics, and composite materials in production, maintenance, and repair applications. The shortened body makes it a practical choice for close-quarters work in HVAC equipment frames, electrical enclosures, plumbing fixture brackets, and sheet metal. Right-hand spiral flutes clear chips efficiently during standard clockwise drilling operations. The straight cylindrical shank seats securely in both keyed and keyless drill chucks across a wide range of portable and bench-mounted equipment.

Key Features

• 135-degree split point reduces walking and lowers entry thrust
• TiN coating increases surface hardness and extends cutting life compared to uncoated HSS
• Web-thinned parallel web maintains cutting efficiency through the full flute length
• Screw machine (stub) length body fits tight-clearance drilling applications
• Heavy-duty grade high-speed steel construction for demanding production and maintenance use
• Straight cylindrical shank is compatible with standard drill chucks

Compatibility

Designed as a direct-fit replacement or stock bit for any standard drill chuck accepting a 0.125-inch straight cylindrical shank, including portable drills, drill presses, and CNC turret setups configured for screw machine length tooling.

Installation Notes

Always secure the workpiece and power down or unplug the drilling equipment before changing bits. Seat the shank fully into the chuck and tighten all chuck jaws evenly before drilling. Wear appropriate eye protection and follow applicable workplace safety standards when operating cutting tools. Use a cutting fluid or lubricant appropriate for the workpiece material to maximize bit life and hole quality.