Sgs 66461 Screw Machine Drill Bit 21/64 in Solid Carbide

Product Description

The SGS 66461 is a solid carbide screw machine length drill bit designed for high-performance drilling across a wide range of materials. It measures 21/64 inches (0.3583 inches) in diameter with a 135-degree split point and a Ti-NAMITE-X coating that extends tool life and reduces heat buildup at the cutting edge. The overall length is 3.5 inches with a 1.85-inch spiral flute. The straight-cylindrical shank measures 0.39 inches in diameter and is ground to a web-thinned standard point for improved chip evacuation and reduced thrust force. Licensed trades and machining professionals install this bit in production drilling environments where consistent hole geometry and tool longevity are required.

The SGS 66461 is suited for use in CNC machining centers, drill presses, and production screw machine setups where shorter overall length provides better rigidity than jobber-length alternatives. The screw machine length format reduces deflection in close-tolerance applications. Rated for universal workpiece materials, it handles steels, aluminum, cast iron, and non-ferrous alloys. The coolant-through design allows internal coolant delivery to the cutting zone, making it a practical choice for high-speed production runs where chip control and thermal management are critical.

Key Features

• Solid carbide micrograin construction for hardness and wear resistance
• Ti-NAMITE-X coating reduces friction and extends cutting life
• 135-degree web-thinned split point lowers thrust and improves self-centering
• Coolant-through capability delivers fluid directly to the cutting edge
• 4-margin geometry improves hole roundness and surface finish
• Screw machine length (3.5 inches OAL) provides added rigidity over jobber-length bits

Compatibility

The SGS 66461 is a Series 142P screw machine length drill bit rated for universal workpiece materials and is compatible with any spindle or collet system accepting a 0.39-inch straight-cylindrical shank.

Installation Notes

This bit is installed and operated by machinists and tool-and-die professionals working with CNC or manual drilling equipment. Ensure the spindle and collet are fully stopped and locked out before changing tooling. Verify shank seating and runout before initiating a cut. When using the coolant-through feature, confirm coolant pressure and flow rate are within the machine specifications before operation.