Kennametal 4150209 Carbide Drill Bit 4.90 Mm 140 Deg

Product Description

The KENNAMETAL 4150209 is a screw machine length (stub) drill bit engineered for precision drilling in demanding industrial and metalworking applications. Built from solid carbide and coated with a multilayer TiAlN finish at the tip, this bit delivers hardness and heat resistance required when drilling through ferrous metals, alloys, and hardened materials. The 140-degree split point reduces thrust and walking at entry. At 4.90 mm in diameter with an overall length of 66.00 mm (approximately 2.60 inches), it is sized for short, rigid setups where runout control and hole accuracy are critical. Qualified machinists and tool-and-die professionals install this type of tooling in CNC machining centers, drill presses, and manual screw machines.

This stub-length drill is suited for applications where a shorter flute and overall length increase rigidity and reduce deflection, particularly in hard or interrupted-cut materials. The straight cylindrical shank accepts standard collets and drill chucks. The regular spiral flute geometry handles chip evacuation in through-hole and blind-hole drilling. The series B041A-CPG designation identifies this as part of a family of solid carbide stub drills conforming to DIN 6537K, a common standard in precision machining environments for tight-tolerance bore work.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• Multilayer TiAlN coating at the tip reduces friction and extends tool life at elevated cutting temperatures
• 140-degree point angle minimizes entry thrust and reduces drill walk on flat and curved surfaces
• Stub length design (flute length 28.00 mm) maximizes stiffness and minimizes deflection
• Straight cylindrical shank (6.00 mm diameter) fits standard collets and chucks without adapters
• Conforms to DIN 6537K specification for consistent dimensional tolerances
• Diameter tolerance held to -0.012 to 0.000 mm for repeatable hole sizing

Compatibility

Designed as a DIN 6537K-compliant stub drill for use in CNC machining centers, drill presses, and screw machines that accept a 6.00 mm straight cylindrical shank. Appropriate for applications within the 3.50 mm to 5.00 mm drill diameter range of the B041A-CPG series.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the straight shank fully and evenly in a collet or drill chuck rated for the shank diameter to prevent runout. Do not use this bit in handheld drills; it is designed for fixed, rigid machine tool setups where axial alignment can be maintained.