Kennametal 4151140 Drill Bit 5.40mm Solid Carbide

Product Description

The KENNAMETAL 4151140 is a screw machine length drill bit designed for precision drilling in demanding metalworking applications. Built from solid carbide and coated with a multilayer TiAlN finish, this bit delivers extended tool life and heat resistance at elevated cutting speeds. The 140-degree split point reduces walking and minimizes the need for a center punch on flat or curved surfaces. At 2.6 inches overall length with a 5.40 mm diameter and a straight cylindrical shank, it is sized for short-reach, rigid setups in CNC machining centers, drill presses, and screw machines. Coolant-through capability supports chip evacuation and thermal control in deep-hole applications. Licensed machinists and tooling specialists are the primary users.

This drill bit is suited for production environments requiring repeatable hole quality in steel, stainless steel, cast iron, and similar ferrous materials. The screw machine length format provides added rigidity compared to jobber-length bits, making it a preferred choice for high-cycle, tight-tolerance drilling on CNC lathes, turret presses, and automatic screw machines. The 3xD flute-by-diameter ratio supports drilling to a maximum depth of 0.79 inches (20.00 mm) per pass. It is part of the KENNAMETAL B051A-CPG series.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• Multilayer TiAlN coating provides heat resistance and extends cutting life
• 140-degree point angle reduces thrust and minimizes drill walk on entry
• Coolant-through design supports chip flushing and temperature control in deep-hole drilling
• Straight cylindrical shank fits standard ER and drill chuck toolholders
• Tapered web configuration adds core strength without sacrificing chip clearance

Compatibility

Part of the KENNAMETAL B051A-CPG series. Designed as an OEM-style replacement or direct tooling selection for screw machine length drill bit applications requiring a 5.40 mm diameter, straight shank solid carbide bit with coolant-through capability.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and machine in a safe, locked-out state per applicable OSHA and machine tool safety standards. Confirm toolholder bore and collet size accommodate the 6.00 mm straight shank before seating the bit. Do not exceed the rated maximum drilling depth of 20.00 mm per pass without retracting to clear chips. Inspect the cutting edge and coating condition before each use to identify wear or chipping that could affect hole tolerance.