Kennametal 4150820 Carbide Jobber Drill 21/32 in 140 Deg

Product Description

The KENNAMETAL 4150820 is a solid carbide jobber-length drill bit designed for high-performance hole-making in demanding production environments. It features a 21/32-inch (0.6563-inch) diameter, a 140-degree point angle for aggressive entry and reduced thrust, and a multilayer TiAlN coating that extends tool life under heat and abrasion. The straight cylindrical shank measures 18 mm in diameter and seats securely in standard drill chucks and collet holders. With an overall length of 143.00 mm (5.63 inches) and a flute length of 93.00 mm (3.66 inches), this tool delivers consistent chip evacuation through its regular right-hand spiral flute geometry. It is intended for use by machinists and tooling professionals in CNC and manual drilling applications.

This drill is rated for use in steel, stainless steel, cast iron, aluminum, and other non-ferrous materials, making it a versatile option across production floors and job shops. The 5xD flute-to-diameter ratio and tapered web configuration support hole depths up to 71.00 mm (2.80 inches). The DIN 6537K specification designation confirms it meets recognized dimensional and performance standards for carbide jobber drills. It is suited for moderate-to-high spindle speeds and is compatible with standard flood coolant setups, though this drill does not include through-coolant capability.

Key Features

• Solid carbide construction for rigidity and extended tool life compared to high-speed steel alternatives
• Multilayer TiAlN coating provides heat resistance and reduced friction at the cutting edge
• 140-degree point angle reduces thrust and improves centering on entry
• Regular right-hand spiral flute promotes efficient chip evacuation
• Tapered web configuration adds core strength without sacrificing cutting performance
• Meets DIN 6537K specification for dimensional consistency

Compatibility

Designed for use in steel, stainless steel, cast iron, aluminum, and non-ferrous materials as stated in the product specifications. Suitable for standard straight-shank drill chucks and collet systems accepting an 18 mm shank diameter.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with carbide tooling. Before changing or seating the drill, ensure the spindle is fully stopped and the machine is in a safe state per shop lockout procedures. Carbide tooling is brittle and should not be subjected to side loads, interrupted cuts beyond its rated capacity, or improper runout conditions. Verify shank seating and chuck or collet condition before running at rated speed.