Import BDNA--22439-1 Jobber Drill Bit Letter K 9/32 Hss

Product Description

The IMPORT BDNA--22439-1 is a jobber-length drill bit sized to Letter K, equivalent to 0.2812 inches (9/32 inch) in diameter. It is manufactured from high speed steel (HSS) with a gold oxide coating that provides basic lubricity and corrosion resistance during drilling operations. The bit features a 118-degree split point, a regular spiral flute, and a straight-cylindrical shank. Web thinning reduces entry thrust, making it suitable for general-purpose drilling in metal, wood, and plastics. This bit is sold individually and is a standard choice for machinists, maintenance technicians, and trade professionals needing a reliable letter-size drill in everyday shop or field use.

This jobber-length bit is designed for general-purpose drilling applications across a wide range of materials including mild steel, aluminum, and similar substrates. The 4-1/4 inch overall length and 2-15/16 inch flute length are consistent with standard jobber proportions, making it compatible with most benchtop drill presses, handheld power drills, and drill chucks accepting a 9/32 inch straight shank. It fits within the 0.2500 to 0.3000 inch drill bit size range, covering common Letter K applications in fabrication, HVAC sheet metal, plumbing rough-in, and general mechanical work.

Key Features

• Letter K size at 0.2812 inches (9/32 inch) diameter for precise hole sizing
• 118-degree split point reduces walking and lowers entry thrust on hard surfaces
• Gold oxide coating improves lubricity and resists surface corrosion
• Web-thinned, tapered web configuration reduces cutting resistance
• Regular spiral flute with right-hand cut for standard drilling direction
• Straight-cylindrical shank compatible with standard 3-jaw drill chucks

Compatibility

Designed as a general-purpose jobber-length drill bit suitable for use in standard drill presses, handheld power drills, and magnetic base drills accepting a 9/32 inch straight-cylindrical shank.

Installation Notes

Install into a properly sized drill chuck and tighten securely before use. Ensure the workpiece is clamped or secured to prevent movement during drilling. Use appropriate cutting fluid when drilling ferrous metals to extend bit life. Always wear eye protection and follow applicable shop safety practices when operating drilling equipment.