Hertel 85704617 Jobber Drill Bit 7/16 in Hss Tin

Product Description

The HERTEL 85704617 is a jobber-length twist drill bit designed for general-purpose metal drilling in maintenance, fabrication, and trade service applications. Ground from high speed steel (HSS) with a titanium nitride (TiN) coating, it delivers improved surface hardness and extended cutting life compared to uncoated HSS. The 7/16 inch (0.4375 inch decimal) diameter bit features a 118-degree standard point angle and a web-thinned, tapered-web geometry that reduces entry force and walking on flat stock. Overall length is 5.5 inches with a 4.0625-inch flute length, and the straight-cylindrical shank accepts standard drill chucks.

This bit is suited for electricians, plumbers, HVAC technicians, pipefitters, and general maintenance trades that need a reliable 7/16 inch hole in mild steel, aluminum, copper, cast iron, and similar machinable materials. The right-hand spiral flute design efficiently clears chips during through-hole drilling in both handheld and drill-press setups. The general-purpose grade makes it a practical stock item for service vans and shop benches alike. Coolant-through capability is not supported, so this bit is intended for dry or externally lubricated drilling operations.

Key Features

• High speed steel construction with TiN coating for increased surface hardness and longer service life
• 118-degree standard point angle with web-thinned, tapered-web tip for reduced thrust and cleaner entry
• Right-hand cut, regular spiral flute for efficient chip evacuation
• 7/16 inch straight-cylindrical shank fits standard 3-jaw drill chucks
• 5.5-inch overall length with 4.0625-inch flute length — jobber proportions suitable for most through-hole applications
• 2-flute design balances cutting speed and chip clearance in general-purpose materials

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard drill chuck accepting a 7/16 inch straight-cylindrical shank, including handheld power drills, drill presses, and magnetic-base drills.

Installation Notes

Installation is performed by a qualified tradesperson using a drill press, corded drill, or magnetic-base drill with a properly sized chuck. Always secure the workpiece before drilling and apply appropriate cutting fluid to ferrous materials to reduce heat buildup. Inspect the cutting edges before use and replace bits that show signs of chipping, dulling, or coating wear to maintain hole quality and prevent workpiece damage. Follow applicable shop safety practices and wear appropriate eye protection.