Kennametal 6351180 5/16 in Carbide Drill Bit 140 Deg

Product Description

The KENNAMETAL 6351180 is a solid carbide screw machine length drill bit designed for high-performance hole-making in demanding materials. Built on the Series K210 platform and coated with AlTiN (aluminum titanium nitride), it handles elevated cutting temperatures while maintaining edge integrity. The 140-degree split point promotes accurate positioning and reduces thrust force at entry. At 3.11 inches overall length with a 5/16-inch diameter, this stub-length bit delivers rigidity and vibration resistance that longer jobber bits cannot match. It is suitable for machinists, tool-and-die technicians, and maintenance professionals running CNC or manual drilling operations.

This drill bit is sized at 0.3125 inches (5/16 inch) and fits within the 0.3000 to 0.3500 inch drill bit size range. The straight cylindrical shank seats securely in standard drill chucks and collet holders. With a flute-to-diameter ratio of 3xD and a maximum drilling depth of 1.11 inches, it is best suited for short, precise holes in ferrous alloys, stainless steel, cast iron, and other hard-to-machine materials where standard high-speed steel tooling falls short. Coolant-through capability supports applications requiring internal fluid delivery to the cutting zone.

Key Features

• AlTiN coating provides high-temperature resistance and extended tool life in abrasive and hard workpiece materials
• 140-degree point angle reduces walking and minimizes burr formation on entry and exit
• Solid carbide construction delivers rigidity and wear resistance superior to HSS alternatives
• Coolant-through design supports internal coolant or air delivery for deep or high-speed operations
• Straight cylindrical shank is compatible with standard drill chucks and ER collet systems
• Series K210 material grade KCMS15 optimized for consistent performance in difficult-to-cut materials

Compatibility

Designed as a screw machine length replacement drill bit for CNC machining centers, drill presses, and manual lathes accepting a straight cylindrical shank in the 0.3000 to 0.3500 inch diameter range.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the shank fully into the chuck or collet and verify runout before beginning a cut. Do not exceed the maximum drilling depth of 1.11 inches without retracting to clear chips, and confirm coolant supply is active when using the through-coolant feature.