Kennametal 4150217 Drill Bit Size 3 Solid Carbide 140 Deg

Product Description

The KENNAMETAL 4150217 is a screw machine length (stub) drill bit in wire gauge Size 3, equal to 0.2130 inches in diameter. Built from solid carbide and coated with TiAlN at the tip, it is engineered for high-speed drilling in hard or abrasive workpiece materials where tool life and hole accuracy are critical. The 140-degree split-point geometry reduces thrust and self-centers on contact, minimizing the need for a center punch or pilot hole. Overall length is 2.5984 inches (66.00 mm), with a straight cylindrical shank of 0.2362 inches (6.00 mm) diameter. This bit is intended for use by machinists and toolroom technicians operating CNC machining centers, drill presses, and screw machines.

This drill bit is suited for close-tolerance production drilling in metalworking environments, including job shops, contract machining, and OEM manufacturing operations. Its stub-length design increases rigidity and reduces deflection in short-reach applications where standard-length bits would flex or chatter. The 2-flute regular spiral geometry provides efficient chip evacuation in through-hole and shallow blind-hole applications. Maximum recommended drilling depth is 0.7874 inches (20.00 mm), consistent with the 3xD flute-by-diameter ratio of the Series B041A-CPG design. No coolant-through feature is present; external coolant or cutting fluid application is standard practice for this bit type.

Key Features

• Solid carbide construction for superior hardness and wear resistance in metalworking applications
• TiAlN tip coating reduces heat buildup and extends tool life in ferrous and hardened materials
• 140-degree standard point angle self-centers and reduces drill thrust
• Stub-length design increases rigidity and minimizes deflection in short-reach setups
• Straight cylindrical shank compatible with standard drill chucks and collet holders
• Diameter tolerance of -0.0005 to 0.0000 inches ensures close-tolerance hole sizing per DIN 6537K

Compatibility

Designed as an OEM-style replacement and production drill bit for use in standard drill chucks and collet systems accepting a 0.2362-inch straight shank. Fits drill presses, CNC machining centers, and screw machines configured for stub-length tooling in the 0.2000 to 0.2500 inch diameter range.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom technicians familiar with cutting tool setup and machine operation. Ensure the machine spindle is fully stopped and locked out before loading or removing the bit from the chuck or collet. Verify shank seating and runout with a dial indicator prior to production use, especially in tight-tolerance applications. Apply appropriate cutting fluid externally, as this bit does not feature coolant-through capability.