Osg 650021521 Screw Machine Drill Bit 0.2152 in Carbide

Product Description

The OSG 650021521 is a screw machine length solid carbide drill bit designed for high-performance drilling in demanding metalworking applications. With a 0.2152 inch (5.47 mm) diameter and a 140-degree split point angle, this bit delivers accurate starts and reduced thrust on hard and abrasive materials. The coated finish extends tool life in high-cycle production environments. A straight-cylindrical shank with a 6.00 mm diameter seats securely in standard drill chucks and collet holders. Coolant-through capability supports high-speed machining where internal coolant delivery is available. Licensed machinists, tool-and-die technicians, and CNC operators are the primary users of this tool.

This drill bit is engineered for production drilling in steel, alloy steel, cast iron, titanium, and titanium alloys. The screw machine length format provides greater rigidity than jobber-length bits, making it well suited for short-reach, high-accuracy drilling on machining centers, CNC lathes, and drill presses. The 3xD flute-to-diameter ratio and regular spiral flute geometry support consistent chip evacuation in these materials. It fits within the 0.2000 to 0.2500 inch diameter range of the OSG Series 6500 high-performance carbide drill line.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous and hard alloy materials
• 140-degree point angle with R-thinned web reduces thrust and improves centering accuracy
• Coated finish extends tool life in abrasive and high-temperature cutting conditions
• Coolant-through design supports high-speed drilling with internal coolant delivery
• Screw machine length with 3xD flute ratio provides rigidity for precise short-reach applications
• Right-hand cut, regular spiral flute geometry promotes reliable chip evacuation

Compatibility

Part of the OSG Series 6500 high-performance carbide drill line, suited for drilling steel, alloy steel, cast iron, titanium, and titanium alloys. Fits standard chucks and collet holders accepting a 6.00 mm straight-cylindrical shank.

Installation Notes

Installation and use of this tool should be performed by qualified machinists or CNC technicians familiar with carbide tooling. Ensure the machine spindle is fully stopped and the tool holder is clean and free of debris before seating the shank. Follow equipment manufacturer guidelines for runout tolerance, feed rate, and cutting speed when programming or setting up a new tool. Carbide tooling is brittle — avoid lateral loading, interrupted cuts beyond the tool rating, or re-chucking with worn collets that can cause vibration-induced fracture.