Kennametal 3640746 Solid Carbide Jobber Drill 4.50 Mm

Product Description

The KENNAMETAL 3640746 is a solid carbide jobber-length drill bit designed for high-performance metal cutting applications. It measures 4.50 mm in diameter with a 140-degree point angle and features an AlTiN (Aluminum Titanium Nitride) coating for extended tool life in demanding materials. The overall length is 74.00 mm, with a 36.00 mm flute length and a 6 mm straight cylindrical shank. Coolant-through capability supports high-speed drilling operations where heat management is critical. Right-hand cutting with a regular spiral flute provides efficient chip evacuation and consistent hole quality in production environments.

This drill bit is engineered for use in steel, stainless steel, and high-temperature alloys, making it well suited for aerospace, automotive, and precision machining applications. The web-thinned, tapered web construction reduces entry thrust and improves centering accuracy. With a 5xD flute-to-diameter ratio and a maximum drilling depth of 29.00 mm, it is appropriate for through-hole and blind-hole work on CNC machining centers and drill presses. It conforms to DIN 6537K specification, a common standard for carbide jobber drills used by professional machinists and tool-room technicians.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard workpiece materials
• AlTiN coating extends tool life at elevated cutting temperatures
• 140-degree point angle reduces thrust and improves self-centering on hard materials
• Coolant-through design supports high-speed, deep-hole drilling with effective heat and chip removal
• Web-thinned tapered web lowers entry force and improves hole accuracy
• Conforms to DIN 6537K specification for consistent dimensional standards

Compatibility

Designed for use in steel, stainless steel, and high-temperature alloys per manufacturer specification. Suitable for CNC machining centers, drill presses, and similar equipment capable of accepting a 6 mm straight cylindrical shank. Conforms to DIN 6537K.

Installation Notes

This tool is installed and operated by qualified machinists or CNC tooling technicians. Secure the shank fully in a collet or drill chuck rated for the intended cutting speeds before operation. Verify coolant-through supply pressure and flow are correctly configured before running through-coolant cycles. Do not use this bit in hand-held drill applications; it is intended for rigid machine tool setups only.