Accupro 10391 Solid Carbide Jobber Drill Bit 7 Mm 150 Deg

Product Description

The ACCUPRO 10391 is a solid carbide jobber-length drill bit designed for precision hole-making in demanding shop and field applications. It measures 7 mm (0.2756 inches) in diameter with an overall length of 3.54 inches and a flute length of 1.65 inches. The 150-degree point angle reduces thrust and improves self-centering on entry, making it well suited for harder workpiece materials. The bright uncoated finish allows direct visual inspection of the carbide substrate. Three spiral flutes with a regular helix provide efficient chip evacuation and stable cutting geometry at the 5xD flute-to-diameter ratio. The straight cylindrical shank seats cleanly in standard drill chucks. Licensed trades and machinists working with tight-tolerance applications will recognize the ANSI specification designation as confirmation of dimensional conformance.

This bit is intended for right-hand cutting in stationary drilling equipment such as drill presses, CNC machining centers, and high-speed hand drills where carbide rigidity can be fully utilized. It falls within the 0.25 to 0.30 inch (7 mm to 8 mm) diameter range, making it a common size for tapping pilot holes, through-holes in ferrous and non-ferrous metals, and close-tolerance work in composites or hard plastics. The single-piece solid carbide construction is preferred in production environments where consistent hole quality across repeated cuts is required. It is sold individually.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• 150-degree point angle reduces entry thrust and improves self-centering
• Three spiral flutes with regular helix for efficient chip evacuation
• Bright uncoated finish — substrate condition visible at inspection
• Straight cylindrical shank for standard chuck compatibility
• ANSI specification designation confirms dimensional compliance

Compatibility

Designed as a standard jobber-length drill bit for use in drill presses, CNC machining centers, and hand drills accepting a straight cylindrical shank within the 7 mm to 8 mm diameter range.

Installation Notes

Solid carbide drill bits are brittle and must be secured in a properly tightened chuck before operation — side loads or angled entry can cause breakage. Power down and de-energize the machine before bit changes. Carbide is not recommended for use in hand-held drilling where deflection cannot be controlled. Follow applicable OSHA machine guarding requirements and the tool manufacturer's recommended spindle speed and feed rate for the workpiece material.