Kennametal 4149239 Solid Carbide Jobber Drill 6.90 Mm

Product Description

The KENNAMETAL 4149239 is a solid carbide jobber-length drill designed for high-performance hole-making in demanding materials. It carries a 140-degree point angle for aggressive penetration and self-centering entry, a multilayer TiAlN coating for heat resistance and extended tool life, and a right-hand spiral flute configuration. The drill measures 6.90 mm (0.2717 inches) in diameter with an overall length of 91.00 mm (3.5827 inches) and a flute length of 53.00 mm (2.0866 inches). It conforms to DIN 6537K geometry. Machinists and tool-and-die professionals install this drill in CNC machining centers and drill presses where consistent bore quality in ferrous and non-ferrous workpieces is required.

This drill is suited for cutting steel, stainless steel, cast iron, aluminum, and other non-ferrous metals. The 5xD flute-to-diameter ratio provides adequate chip evacuation for jobber-depth holes. Coolant-through capability supports high-speed drilling cycles where through-spindle coolant is available, reducing heat buildup and chip packing in the flute. The straight cylindrical shank with an 8.00 mm (0.3150 inch) diameter seats in standard ER collet chucks, drill chucks, or hydraulic toolholders. Typical applications include production drilling in job shops, aerospace component machining, and general metalworking operations requiring tight diameter tolerance.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive workpiece materials
• Multilayer TiAlN coating reduces friction and extends cutting life at elevated temperatures
• 140-degree point angle improves self-centering and reduces thrust load on entry
• Coolant-through design compatible with through-spindle coolant delivery systems
• DIN 6537K specification ensures dimensional consistency and interchangeability
• Tapered web configuration maintains core strength while improving chip flow

Compatibility

Designed as a DIN 6537K-compliant jobber drill for use in machining centers and drill presses equipped with straight-shank toolholding systems accepting an 8.00 mm shank diameter. Suitable for workpiece materials including steel, stainless steel, cast iron, aluminum, and non-ferrous alloys.

Installation Notes

Installation is performed by a machinist or toolroom technician. Confirm the spindle or toolholder is fully stopped and the machine is in a safe state before changing tooling. Seat the straight shank fully into the collet or chuck and verify runout with a dial indicator before beginning a production run. Follow the tool manufacturer's recommended cutting parameters for the specific workpiece material; do not exceed the drill's rated maximum drilling depth of 43.00 mm (1.6929 inches) per cycle without retracting to clear chips.