Kennametal 4149236 Solid Carbide Jobber Drill 6.70mm

Product Description

The KENNAMETAL 4149236 is a solid carbide jobber-length drill bit with a 6.70 mm (0.2638 inch) diameter and a 140-degree point angle. It features a multilayer TiAlN coating applied over a high-performance carbide substrate, which extends tool life in demanding materials by reducing heat buildup and edge wear. The drill runs in a right-hand cutting direction with a regular spiral flute configuration and a straight cylindrical shank. Overall length is 91.00 mm (3.5827 inches), with a 53.00 mm (2.0866 inch) flute length. Coolant-through capability is included, making it suitable for high-speed drilling operations where chip evacuation and thermal management are critical. This drill is intended for installation by machinists and toolroom professionals operating CNC machining centers and drill presses.

This drill is rated for use in steel, stainless steel, cast iron, aluminum, and other non-ferrous materials. Its 5xD flute-to-diameter ratio supports deeper hole applications relative to standard jobber geometry. The straight shank diameter of 8.00 mm (0.3150 inch per the shank spec) accommodates standard collets and drill chucks commonly used on vertical machining centers, CNC lathes, and bench-top drill presses. The 140-degree point angle is well suited to harder workpiece materials where a more aggressive point geometry reduces thrust force and improves hole entry accuracy. Typical applications include production drilling in metalworking shops, maintenance repair environments, and precision fabrication settings.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous and non-ferrous materials
• Multilayer TiAlN coating reduces friction and extends tool life at elevated cutting temperatures
• 140-degree point angle optimized for steel and stainless steel applications
• Coolant-through design supports chip evacuation and thermal control at depth
• Regular spiral flute with tapered web configuration for consistent chip flow
• Meets DIN 6537K specification for dimensional and geometric accuracy

Compatibility

Designed as an OEM-style replacement or direct-use drill bit for machining centers, CNC lathes, and drill presses accepting straight-shank tooling. Primary workpiece materials include steel, stainless steel, cast iron, aluminum, and non-ferrous alloys. Drill bit size falls within the 6.00 mm to 7.00 mm (0.2500 to 0.3000 inch) diameter range per the DIN specification designation.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom technicians familiar with rotating cutting tool safety. Ensure the machine spindle is fully stopped and the tool holder is de-energized before loading or removing the drill. Verify collet or chuck bore matches the 8.00 mm shank diameter before securing; improper seating can cause runout and premature tool failure. When running with coolant-through capability, confirm the machine tool spindle and toolholder assembly support internal coolant delivery before engaging the coolant circuit.