Kennametal 4150159 Screw Machine Drill Bit 3.20mm Carbide

Product Description

The KENNAMETAL 4150159 is a solid carbide screw machine length drill bit designed for precision drilling in demanding industrial and metalworking applications. Built to Series B041A standards and compliant with DIN 6537K, this bit features a 140-degree split-point geometry and a TiN tip coating to extend tool life and reduce heat buildup at the cutting edge. With a 3.20 mm diameter and a compact 62.00 mm overall length, it is suited to short-reach, high-accuracy drilling where rigidity and repeatability matter. A right-hand, regular spiral flute with a tapered web configuration promotes efficient chip evacuation in tough materials. Machinists, toolroom technicians, and production floor operators are the primary users of this type of tooling.

This drill bit is intended for use on steel, stainless steel, cast iron, and high-temperature alloys in production machining environments. The screw machine length designation means the short flute-to-diameter ratio maximizes stiffness, making it a reliable choice for CNC machining centers, drill presses, and screw machines where minimal deflection is critical. The straight-cylindrical shank at 6.00 mm diameter fits standard collets and chucks. Maximum drilling depth is 14.00 mm, and the flute-to-diameter ratio is 3xD, consistent with stub-length drilling performance expectations.

Key Features

• Solid carbide construction for hardness and wear resistance in ferrous and high-temp alloy workpieces
• 140-degree drill point angle reduces thrust force and improves centering on entry
• TiN tip coating extends cutting edge life and resists galling in steel and stainless applications
• Screw machine length body provides maximum rigidity and minimizes deflection in short-reach bores
• Tapered web configuration supports efficient chip flow without coolant-through requirement
• Meets DIN 6535 and DIN 6537 standards for dimensional and geometric consistency

Compatibility

Designed for use in standard straight-shank collets and drill chucks accepting a 6.00 mm shank diameter. Suitable for drilling steel, stainless steel, cast iron, and high-temperature alloys. Compatible with CNC machining centers, turret lathes, and drill presses equipped for screw machine length tooling in the 0.1000 to 0.1500 decimal inch diameter range.

Installation Notes

Installation should be performed by qualified machinists or toolroom personnel following established machine tool safety procedures. Ensure the spindle is fully stopped and machine power is isolated before changing tooling. Verify collet or chuck runout is within acceptable limits before seating the shank, as excess runout accelerates carbide wear and can cause premature breakage. Do not use this bit beyond its rated 14.00 mm maximum drilling depth without confirming chip clearance and tool deflection are within process tolerances.