Accupro 20359 Jobber Drill Bit Wire 21 Solid Carbide Tin

Product Description

The ACCUPRO 20359 is a jobber-length drill bit designed for precision drilling in metal, composite, and hard material applications. Built from solid carbide with a titanium nitride (TiN) coating, it delivers extended tool life and reduced friction compared to uncoated high-speed steel bits. The bit measures 2.5 inches overall length with a 1 inch flute length, and its wire gauge size 21 corresponds to a decimal diameter of 0.1590 inches. The 150-degree point angle and three-flute spiral geometry promote fast chip evacuation and accurate hole entry, making it a go-to choice for machinists, tool-and-die technicians, and maintenance professionals working with tight-tolerance holes.

This drill bit is suited for production and maintenance drilling operations where consistent hole quality and tool longevity are required. The straight cylindrical shank fits standard drill chucks and CNC tool holders. Its 5xD flute-to-diameter ratio supports deep drilling in a single pass for most jobber-length applications. Right-hand cutting direction is standard for conventional drill press, lathe, and machining center setups. The ANSI specification designation confirms dimensional conformance to recognized industry standards.

Key Features

• Solid carbide construction for hardness and wear resistance in demanding materials
• TiN coating reduces friction and increases surface hardness for longer tool life
• 150-degree point angle for aggressive cutting and reduced thrust force
• Three-flute spiral design promotes efficient chip evacuation
• Wire size 21 decimal diameter of 0.1590 inches for tight-tolerance hole sizing
• ANSI-conforming dimensions ensure compatibility with standard tooling setups

Compatibility

Designed as a standard jobber-length drill bit with a straight cylindrical shank, compatible with conventional drill chucks, collet holders, and CNC tool holders accepting a shank diameter corresponding to wire size 21 (0.1590 inches).

Installation Notes

Solid carbide bits are brittle and require rigid setups — avoid use in handheld drills where lateral flex can cause chipping or breakage. Secure the workpiece firmly and verify spindle runout is within acceptable limits before drilling. Confirm cutting speed and feed rate are appropriate for the workpiece material and carbide tooling requirements. Follow all applicable shop safety procedures and machine guarding requirements when operating drilling equipment.