Kennametal 4112650 Solid Carbide Jobber Drill Bit 8.5 Mm

Product Description

The KENNAMETAL 4112650 is a solid carbide jobber length drill bit designed for precision hole-making in demanding machining applications. Built to DIN 6537K specification, it features a multilayer TiAlN coating that extends tool life in high-temperature cutting conditions. The bit measures 8.5 mm in diameter with an overall length of 4.055 inches (103 mm) and a flute length of 2.402 inches (61 mm). Internal coolant-through capability supports chip evacuation and heat management during deep-hole drilling operations. This bit is suited for CNC machining centers and production drilling environments where dimensional accuracy and tool longevity are critical priorities.

This drill bit is intended for use in metal cutting applications including steel, cast iron, stainless, and similar workpiece materials where a TiAlN-coated carbide tool is appropriate. The 5xD flute-to-diameter ratio and tapered web configuration make it well-suited for production environments running moderate to high spindle speeds with coolant delivery. It is used by machinists, toolroom technicians, and CNC operators working in aerospace, automotive, and general metalworking shops. The straight-cylindrical shank fits standard drill chucks and collet holders with a 10 mm shank diameter.

Key Features

• Solid carbide construction using KCPK15 material grade for rigidity and wear resistance
• Multilayer TiAlN coating for extended tool life at elevated cutting temperatures
• Coolant-through design aids chip evacuation and reduces heat at the cutting edge
• 135-degree split point angle reduces entry thrust and walking on hard materials
• Right-hand spiral flute with regular helix for consistent chip flow
• Diameter tolerance of 0.0002 to 0.0008 inches for precise hole sizing

Compatibility

Designed as an OEM-specification solid carbide jobber drill for use in standard drill chucks and collet tool holders accepting a 10 mm straight-cylindrical shank, suitable for CNC machining centers and manual machine tools configured for coolant-through tooling.

Installation Notes

This drill bit should be installed and operated by qualified machinists or CNC tooling technicians. Ensure the spindle and coolant supply are fully powered off before changing tooling. Verify that the collet or chuck is rated for the 10 mm shank diameter and that internal coolant passages are clear before use. Do not exceed the recommended maximum drilling depth of 1.929 inches (49 mm) per pass without retracting to clear chips.