Hertel 85707636 Jobber Drill Bit Wire 39 Hss Tin 2-3/8 in

Product Description

The HERTEL 85707636 is a jobber-length twist drill bit sized to wire gauge 39, with a decimal diameter of 0.0995 inches. Built from high speed steel (HSS) with a titanium nitride (TiN) coating, this bit is engineered for general-purpose drilling in metals, plastics, and similar shop materials. The TiN coating extends surface hardness and wear resistance compared to uncoated HSS. At 2-3/8 inches overall length with a 1-3/8 inch flute, it fits standard jobber-length applications. The straight-cylindrical shank seats in any keyed or keyless drill chuck within its diameter range. Right-hand spiral flutes evacuate chips efficiently during through-hole and blind-hole drilling operations.

This bit is suited for production and maintenance drilling tasks encountered by machinists, millwrights, electricians, and general tradespeople. Wire gauge 39 falls within the small-diameter range of 0.0500 to 0.1000 inches, making it appropriate for pilot holes, precision clearance holes, and light metalworking applications. The 118-degree standard point angle and web-thinned, tapered web configuration reduce entry force and improve centering on flat and curved surfaces. Sold individually, with a minimum order quantity of 12 units per order.

Key Features

• High speed steel construction with TiN coating for extended wear life
• Wire gauge 39 diameter — 0.0995 inches decimal equivalent
• 118-degree standard split point with web-thinned, tapered web for reduced thrust
• Regular spiral, two-flute design for consistent chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks
• Right-hand cut — suitable for conventional drilling operations

Compatibility

Designed as a general-purpose jobber-length drill bit for use in handheld drills, drill presses, and CNC equipment accepting a straight-cylindrical shank at 0.0995 inches diameter.

Installation Notes

Installation and use should follow standard machine tool practices for small-diameter drill bits. Secure the shank fully in the chuck before operation and verify runout is within acceptable limits. Reduce feed rate when breaking through material to avoid bit deflection or breakage at this diameter. Cutting fluid is recommended when drilling ferrous metals to preserve coating life and bit geometry.