Kennametal 5990937 Solid Carbide Jobber Drill Letter F

Product Description

The KENNAMETAL 5990937 is a solid carbide jobber-length drill bit sized to Letter F (0.2570 inches) with a 135-degree split-point geometry. It is designed for precision hole-making in aluminum and non-ferrous materials at production volumes. The 135-degree point reduces walking at entry and minimizes burring at exit. Built from solid carbide in a bright/uncoated finish, this drill delivers the rigidity and wear resistance that machinists and tool-room technicians require when drilling non-ferrous alloys. Coolant-through capability supports high-speed, deep-hole applications where chip evacuation and heat management are critical.

This drill is suited to CNC machining centers, drill presses, and manual machine-shop setups where Letter F diameter holes are required in aluminum, copper, brass, and similar non-ferrous workpiece materials. The 3-flat shank (8 mm shank diameter) prevents rotation in the chuck and is compatible with standard collet and keyless chuck systems. With a 5xD flute-to-diameter ratio and a 53 mm flute length, it handles moderate-depth bores cleanly. Installation and operation are performed by machinists and tool-and-die professionals in metalworking environments.

Key Features

• Solid carbide construction provides rigidity and extended tool life in non-ferrous applications
• 135-degree split-point geometry reduces entry walking and exit burr formation
• Coolant-through design supports chip evacuation and heat control at depth
• 3-flat shank (8 mm diameter) prevents chuck slippage during high-torque drilling
• Bright/uncoated finish optimized for aluminum and non-ferrous workpiece materials
• Tight diameter tolerance of 0.0002 to 0.0008 inches ensures consistent hole sizing

Compatibility

Designed for use in aluminum and non-ferrous workpiece materials. The 3-flat shank is compatible with standard collet chucks and keyless chuck systems that accept an 8 mm shank. Intended for CNC and manual machining setups requiring a Letter F (0.2570 inch) bore diameter.

Installation Notes

Installation and tool changes must be performed with the machine powered down and in a locked-out state per applicable shop safety procedures. Seat the 3-flat shank fully into the chuck and verify positive engagement before resuming operation. When using coolant-through capability, confirm that the coolant supply line and pressure are set per the machine manufacturer specifications before initiating the cut. Carbide tooling is brittle — avoid lateral loading or impact that can cause chipping or fracture.