Kennametal 4151149 Solid Carbide Stub Drill Bit 6.10mm

Product Description

The KENNAMETAL 4151149 is a solid carbide screw machine length (stub) drill bit designed for high-performance drilling in demanding metalworking and machining applications. Built to DIN 6537K specification, it features a 6.10 mm cutting diameter, a 140-degree split point for accurate starting and reduced thrust, and a multilayer TiAlN coating at the tip to extend tool life at elevated cutting temperatures. The straight-cylindrical shank measures 8.00 mm in diameter and seats securely in standard chucks and collets. This bit is suited for production drilling environments where cycle time and tool longevity are priorities.

This drill bit is used in CNC machining centers, drill presses, and screw machines handling ferrous and non-ferrous metals, stainless steels, cast iron, and hardened alloys. Its stub-length body and 3xD flute-to-diameter ratio make it well suited for short-reach, rigid setups where runout must be minimized. Coolant-through capability supports high-speed production drilling with through-spindle coolant systems, improving chip evacuation and thermal management at the cutting zone.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard or abrasive materials
• 140-degree point angle reduces thrust and improves self-centering on entry
• TiAlN tip coating extends cutting life under high heat conditions
• Coolant-through design supports through-spindle coolant for deep-hole chip evacuation
• DIN 6537K specification ensures dimensional consistency and interchangeability
• Tapered web configuration adds core strength and reduces cutting forces

Compatibility

Designed as a Series B051A-CPG stub-length carbide drill bit for use in standard straight-shank chucks and collets accepting an 8.00 mm shank diameter, in CNC and manual drilling applications requiring a 6.10 mm bore diameter per DIN 6537K.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank fully in the collet or chuck and verify runout with a dial indicator before production use. When using coolant-through capability, confirm that spindle coolant pressure and flow rate are within the machine tool manufacturer's recommended range before drilling.