Hertel 85704559 Jobber Drill Bit 21/64 Inch Hss Tin

Product Description

The HERTEL 85704559 is a jobber-length twist drill bit designed for general-purpose drilling in metal, wood, and composite materials. It measures 21/64 inch (0.3281 inch decimal) in diameter with a 118-degree standard point angle and a titanium nitride (TiN) coating over a high-speed steel (HSS) body. The TiN coating reduces friction, extends tool life, and helps maintain cutting edge sharpness under repeated use. Overall length is 4-5/8 inches with a flute length of 3-5/16 inches. This bit is suited for use in hand drills, drill presses, and CNC drilling operations where a straight-cylindrical shank is required. Machinists, pipefitters, electricians, and general tradespeople rely on jobber-length bits for everyday hole-making tasks.

This bit is appropriate for residential and light commercial trade work as well as shop and fabrication environments. The right-hand spiral flute and standard point geometry make it compatible with conventional drilling setups. The web-thinned, tapered-web configuration reduces thrust requirements at the point, making it easier to start holes accurately. The straight-cylindrical shank seats securely in standard 3-jaw chucks. This is a single-piece, individually packaged bit intended for professional use.

Key Features

• 21/64 inch diameter with 0.3281 inch decimal equivalent for precise sizing
• 118-degree standard point angle with web-thinned, tapered-web construction for easier starts
• TiN coating over HSS body for extended wear resistance and reduced friction
• Right-hand cut, regular spiral flute for efficient chip evacuation
• 4-5/8 inch overall length with 3-5/16 inch flute length for jobber-range reach
• Straight-cylindrical shank fits standard 3-jaw drill chucks

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any drilling tool that accepts a straight-cylindrical shank in the 21/64 inch diameter range, including hand drills, drill presses, and CNC machining centers.

Installation Notes

Installation is performed by machinists, electricians, pipefitters, and other tradespeople using standard drill equipment. Secure the straight-cylindrical shank fully into the chuck and verify it is centered and tightened before operation. Apply appropriate cutting fluid when drilling hardened metals to preserve the TiN coating and cutting edge. Inspect the bit for wear or damage before each use and replace if the point or flute edges show signs of chipping.