Hertel 85704641 Jobber Drill Bit 31/64 in Hss Tin

Product Description

The HERTEL 85704641 is a jobber-length twist drill bit designed for general-purpose drilling in metal, wood, and plastic. Built from high speed steel (HSS) with a titanium nitride (TiN) coating, this bit delivers extended tool life and reduced friction during cutting. The 118-degree standard point angle and web-thinned, tapered web configuration allow for clean entry and efficient chip evacuation. At 5-7/8 inches overall length with a 4-3/8 inch flute length, the 85704641 fits standard drill chucks and machine spindles. Machinists, maintenance technicians, and general fabricators install this bit in drill presses, handheld drills, and CNC drilling setups.

This bit is suited for light to medium-duty drilling applications in general manufacturing, maintenance, and repair environments. The straight-cylindrical shank seats securely in three-jaw chucks without slipping under load. The right-hand spiral flute pulls chips up and out of the hole during drilling, reducing heat buildup and bit walking. The 31/64 inch diameter falls within the 0.4000 to 0.5000 inch decimal range, making it a common size for through-hole and clearance-hole work in mild steel, aluminum, and similar materials.

Key Features

• HSS construction with TiN coating for extended cutting life and reduced friction
• 118-degree standard point angle for general-purpose drilling in a wide range of materials
• Web-thinned, tapered web reduces thrust force and improves chip flow
• Right-hand spiral flute with regular helix efficiently evacuates chips
• Straight-cylindrical shank for secure seating in standard three-jaw chucks
• 5-7/8 inch overall length provides jobber-standard reach for most benchtop and floor-standing drill presses

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with standard three-jaw chucks accepting a 31/64 inch straight-cylindrical shank.

Installation Notes

Installation is performed by machinists or maintenance technicians using a standard drill press, handheld drill, or CNC spindle. Secure the straight-cylindrical shank fully into the chuck and tighten all jaws before operation. Center-punch the workpiece before drilling to prevent walking at startup. Apply cutting fluid when drilling ferrous metals to manage heat and extend bit life.