Kennametal 4149643 Taper Length Drill Bit 6.2mm Carbide

Product Description

The KENNAMETAL 4149643 is a taper length solid carbide drill bit from the B053A-CPG series, designed for precision drilling in demanding industrial and metalworking applications. The bit measures 6.2 mm (0.2441 inches) in diameter with a 105 mm (4 inches) overall length and a 67 mm (2.64 inches) spiral flute length. A 140-degree standard point angle delivers efficient cutting entry and reduced thrust. The TiAlN coating extends tool life in high-heat cutting environments. Coolant-through capability allows cutting fluid to reach the cutting zone directly, improving chip evacuation and thermal control. This bit is installed by machinists and tooling professionals in production and job shop settings.

The 4149643 suits taper length drilling operations where added flute length is needed beyond a jobber drill. The 8xD flute-to-diameter ratio supports deeper hole engagement. The straight cylindrical shank measures 8 mm (0.315 inches) in diameter and 36 mm (1.42 inches) in length, making it compatible with standard drill chucks and collet systems. Maximum drilling depth is 57 mm (2.24 inches). The right-hand spiral flute and tapered web configuration promote clean chip flow and centerline stability through the cut. This drill suits CNC machining centers and manual drilling setups requiring close-tolerance hole sizing.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• TiAlN coating for extended tool life in high-temperature cutting conditions
• 140-degree standard point angle reduces thrust and improves entry accuracy
• Coolant-through design delivers fluid directly to the cutting edge for chip evacuation and heat control
• 8xD flute-to-diameter ratio supports deeper hole applications
• Tapered web configuration promotes centerline strength and stability

Compatibility

Designed as a taper length drill bit in the B053A-CPG series, this bit fits standard straight-shank drill chucks and collet holders accepting an 8 mm shank diameter. Verify spindle and chuck capacity before installation.

Installation Notes

Installation is performed by machinists and CNC tooling technicians. Ensure the machine spindle is fully stopped and locked out before loading or removing the bit. Secure the straight shank fully within the chuck or collet to the recommended engagement depth to prevent runout. When using coolant-through capability, confirm the machine spindle and toolholder are configured for internal coolant delivery before engaging the coolant supply.