Kennametal 4150247 19/64 in Carbide Stub Drill Bit

Product Description

The KENNAMETAL 4150247 is a screw machine length (stub) solid carbide drill bit designed for high-performance drilling in demanding production environments. Built to DIN 6537K standards, it features a 19/64 inch (0.2969 inch decimal) diameter, a 140-degree split point for accurate self-centering, and a multilayer TiAlN coating at the tip to extend tool life under heat and abrasion. The straight cylindrical shank and right-hand spiral flute geometry suit it for use in CNC machining centers, drill presses, and screw machine setups where short, rigid tooling is required. This bit is sold individually and is appropriate for tool room machinists, production shop technicians, and CNC operators.

This drill bit is suited for stub-length applications where rigidity and minimal deflection are priorities over deep-hole capacity. The 3xD flute-to-diameter ratio and tapered web configuration support chip evacuation in short-reach drilling operations. Typical applications include precision hole-making in ferrous and non-ferrous metals on production lines or job shop floors where a compact, stiff drill profile reduces chatter and improves hole quality. Maximum drilling depth is 1.1417 inches (29.00 mm).

Key Features

• Solid carbide construction for rigidity and wear resistance in production drilling
• TiAlN tip coating extends tool life in high-temperature cutting conditions
• 140-degree point angle promotes self-centering and reduces walking on entry
• Stub length (screw machine length) profile minimizes deflection in short-reach setups
• Right-hand, regular spiral flute design with tapered web for efficient chip clearance
• Conforms to DIN 6537K specification for consistent dimensional tolerance (-0.0006 to 0.0000 inch)

Compatibility

Designed as an OEM-style stub drill for use in standard straight-shank drill chucks and collet systems accepting a 0.3150 inch (8.00 mm) shank diameter; part of the KENNAMETAL B041A-CPG series.

Installation Notes

Installation should be performed by a qualified machinist or CNC technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Secure the straight shank in a properly sized drill chuck or collet to the manufacturer-recommended clamping depth before operation. Verify spindle speed and feed rate settings match the workpiece material and drill diameter before engaging the cut.