Accupro 4500214 Letter I Carbide Jobber Drill Bit 0.272in

Product Description

The ACCUPRO 4500214 is a solid carbide jobber-length drill bit sized to Letter I (0.2720 inches) with a 118-degree point angle and a DLC (Diamond-Like Carbon) coating. It is designed for high-performance drilling in aluminum and non-ferrous materials where tool life and hole quality are critical. The straight cylindrical shank measures 17/64 inches (0.2656 inches decimal) and fits standard drill chucks. With coolant-through capability and a regular spiral flute geometry, this bit is suited for CNC machining centers and production drilling environments where coolant delivery at the cutting edge improves chip evacuation and tool life.

This drill bit is intended for use in machining aluminum, brass, copper, and other non-ferrous workpieces in production and job-shop environments. The 5xD flute-to-diameter ratio provides adequate chip clearance for deeper holes in softer, gummy materials. It is typically installed in CNC machining centers, drill presses, or high-speed spindles by machinists and tool-and-die professionals. The ISO specification designation confirms dimensional conformance to international tooling standards.

Key Features

• Solid carbide construction provides rigidity and wear resistance over high-speed steel alternatives in non-ferrous applications
• DLC coating reduces built-up edge and friction when cutting aluminum and other non-ferrous materials
• Coolant-through design delivers coolant directly to the cutting zone for improved chip evacuation and extended tool life
• 118-degree point angle suits general-purpose drilling in non-ferrous metals
• Regular spiral flute geometry with a 5xD ratio supports chip clearance in deeper holes
• Straight cylindrical shank is compatible with standard drill chucks and collet systems

Compatibility

Designed for use in CNC machining centers, drill presses, and other rotating spindle equipment that accept straight-shank drill bits. Primary workpiece material compatibility is aluminum and non-ferrous metals as specified by the manufacturer.

Installation Notes

This drill bit is installed and serviced by machinists and CNC operators. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Verify chuck or collet runout before use, as excessive runout accelerates edge wear on carbide tooling. Solid carbide bits are brittle compared to high-speed steel and should not be used in setups with significant side-load or vibration.