Osg 8690420 Solid Carbide Screw Machine Drill Bit

Product Description

The OSG 8690420 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding industrial and machining applications. It measures 4.20 mm (0.1654 inches) in diameter with a 140-degree split point angle and features coolant-through capability, making it well-suited for deep-hole and high-speed operations where heat management is critical. The straight-cylindrical shank and R-thinned web reduce thrust and improve chip evacuation. This bit belongs to OSG Series 6500 and is built to tight diameter tolerances of plus 0 to minus 0.018 mm. It is installed and used by machinists, tool-and-die professionals, and CNC operators.

This drill bit is intended for use on steel, alloy steel, cast iron, titanium, and titanium alloys. Its screw machine length (stub) geometry makes it a practical choice for rigid setups in machining centers, drill presses, and CNC lathes where a shorter overhang is preferred for improved rigidity and positional accuracy. The 3xD flute-to-diameter ratio supports efficient chip removal in moderate-depth holes. It is well-suited for production environments where consistent hole quality and tool life are priorities.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• 140-degree point angle reduces thrust and improves self-centering on entry
• Coolant-through design supports internal coolant delivery for heat control and chip flushing
• R-thinned web with tapered web configuration lowers cutting force at the chisel edge
• Right-hand spiral flute geometry for standard CNC and manual machine spindle compatibility
• Straight-cylindrical shank fits standard collets and drill chucks without adapters

Compatibility

Designed for use in machining applications involving steel, alloy steel, cast iron, titanium, and titanium alloys. Part of the OSG Series 6500 high-performance screw machine drill line. Fits any spindle or chuck accepting a 5.00 mm straight shank.

Installation Notes

Install in a collet or keyless chuck rated for the shank diameter before powering the spindle. Verify spindle speed and feed rate settings against the workpiece material prior to cutting. When using the coolant-through feature, confirm that the machine tool's coolant supply is connected and at the correct pressure before beginning the operation. Inspect the cutting edges for wear or chipping before each use and replace the bit if edge integrity is compromised.