Accupro 10403 Solid Carbide Jobber Drill Bit 21/64 in

Product Description

The ACCUPRO 10403 is a solid carbide jobber-length drill bit designed for precision drilling in demanding machining applications. Ground to a 150-degree point angle with a bright, uncoated finish, this bit delivers clean entry and consistent hole geometry in hard and abrasive workpiece materials. Three spiral flutes with a regular spiral type provide efficient chip evacuation across the 2-inch flute length, while the straight cylindrical shank ensures secure seating in standard drill chucks and collets. At 4 inches overall length and 21/64 inch (0.3281 inch) diameter, this bit suits production and job-shop environments where dimensional accuracy and tool life are priorities.

This drill bit is suited for use in CNC machining centers, drill presses, and hand-held drilling equipment where solid carbide tooling is specified. The ANSI-compliant geometry and 5xD flute-to-diameter ratio make it a practical choice for drilling through ferrous and non-ferrous metals, composites, and other materials that benefit from carbide hardness. Machinists, tool-and-die makers, and maintenance technicians typically reach for this bit when high-speed steel tooling underperforms in harder or abrasive materials.

Key Features

• Solid carbide construction for superior hardness and wear resistance in demanding materials
• 150-degree point angle reduces thrust force and improves hole entry on flat and curved surfaces
• Three spiral flutes with regular helix for consistent chip evacuation and reduced heat buildup
• Bright, uncoated finish maintains full carbide substrate hardness without coating-related dimensional variation
• ANSI specification compliance ensures dimensional consistency and interchangeability
• Straight cylindrical shank fits standard chucks and collets without adapters

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide jobber drill bit fitting standard straight-shank drill chucks and collets in the 21/64 inch diameter range per ANSI specification.

Installation Notes

Installation is typically performed by a machinist or maintenance technician. Ensure the machine spindle is fully powered down and locked out before changing tooling. Seat the straight cylindrical shank fully into the chuck or collet and tighten to the equipment manufacturer's specified clamping procedure. Solid carbide is brittle compared to high-speed steel — avoid side loads and interrupted cuts that could cause chipping or breakage.