Kennametal 4151123 Drill Bit 4.30mm Solid Carbide 140 Deg

Product Description

The KENNAMETAL 4151123 is a screw machine length (stub) drill bit engineered for precision drilling in metalworking and machining applications. Built from solid carbide and coated with a multilayer TiAlN finish at the tip, it delivers extended tool life under high-speed cutting conditions. The bit features a 140-degree split point that reduces walking and thrust load at entry. With a 4.30 mm cutting diameter, an overall length of 66.00 mm (2.5984 inches), and a 6.00 mm straight-cylindrical shank, this bit is sized for use in CNC machining centers, drill presses, and screw machine setups. It conforms to DIN 6537K specification. Installation is handled by machinists and tool-and-die professionals in production and job-shop environments.

This drill bit is suited for high-production drilling in ferrous and non-ferrous metals where tight tolerances and repeatable hole quality are required. The stub-length design increases rigidity compared to jobber-length bits, making it effective in applications where deflection and runout must be minimized. The coolant-through design supports internal coolant delivery for chip evacuation and heat management in deep-hole and high-feed operations. The 3xD flute-to-diameter ratio and regular spiral flutes provide consistent chip flow at production feed rates.

Key Features

• Solid carbide construction for rigidity and wear resistance in metalcutting
• Multilayer TiAlN coating (TiN at tip) extends cutting edge life under heat
• 140-degree point angle reduces entry thrust and self-centers without a pilot hole
• Coolant-through design supports internal coolant delivery for chip evacuation
• Straight-cylindrical 6.00 mm shank fits standard drill chucks and collets
• DIN 6537K compliant with tapered web and 3xD flute ratio for production use

Compatibility

Designed as an OEM-style replacement and standard tooling option within the KENNAMETAL B051A-CPG series. Fits standard straight-shank drill chucks and collets accepting a 6.00 mm shank diameter.

Installation Notes

Installation is performed by machinists in machine shop environments. Secure the shank firmly in a collet or drill chuck and verify runout before cutting. Power down and de-energize the machine spindle before changing tooling. Follow shop-floor tooling change procedures and applicable OSHA machine guarding requirements when handling carbide cutting tools.