Kennametal 4150221 Screw Machine Drill Bit Size 2 Carbide

Product Description

The KENNAMETAL 4150221 is a screw machine length (stub length) drill bit designed for high-performance drilling in demanding production environments. Built from solid carbide and coated with TiN at the tip, it delivers the hardness and wear resistance required for drilling steel, cast iron, and other ferrous materials at elevated speeds. The 140-degree point angle promotes fast penetration and reduces thrust load on entry. At 2.5984 inches overall length with a 1.1024-inch flute length, this compact geometry suits applications where rigidity and minimal deflection are priorities. HVAC fabricators, tool and die shops, and general machining operations rely on this style of bit for close-tolerance work.

This drill bit is suited for use in CNC machining centers, drill presses, and screw machine operations requiring consistent hole quality in metallic workpieces. The 0.2210-inch cutting diameter and straight cylindrical shank with a 0.2362-inch shank diameter allow direct installation into standard collets and drill chucks. The regular spiral flute pattern and tapered web configuration support efficient chip evacuation at moderate to high feed rates. It is not designed for coolant-through applications. Maximum drilling depth is 0.7874 inches, making it appropriate for shallow-to-medium depth holes typical in production drilling cycles.

Key Features

• Solid carbide construction for superior wear resistance in ferrous and non-ferrous materials
• TiN tip coating reduces friction and extends tool life at the cutting edge
• 140-degree standard point angle reduces entry thrust and improves self-centering
• Straight cylindrical shank (0.2362 inches diameter) for compatibility with standard collets and chucks
• Tapered web configuration supports chip flow in short-depth drilling applications
• Conforms to DIN 6537K specification for dimensional consistency

Compatibility

Designed as an OEM-style replacement and general-use drill bit for screw machine and stub-length drilling applications; confirm chuck or collet clearance for 0.2362-inch straight shank before installation.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the spindle is fully stopped and the machine is locked out before inserting or removing the bit from the chuck or collet. Verify runout with a dial indicator after seating the shank to prevent premature edge wear. Do not exceed the maximum drilling depth of 0.7874 inches in a single pass without retracting to clear chips, as this bit does not support coolant-through operation.