Sgs 66469 Screw Machine Drill Bit 23/64 in Carbide

Product Description

The SGS 66469 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding production environments. With a 23/64 inch (0.3898 inch decimal) diameter and a 135-degree split point, this bit starts on contact and reduces walking on flat or curved surfaces. The Ti-NAMITE-X coating provides enhanced wear resistance and lubricity, extending tool life in a wide range of workpiece materials. At 3-1/2 inches overall length with a 1.85-inch spiral flute, it is built for compact, rigid setups where stub-length reach is preferred over jobber-length reach. Cutting direction is right hand with a regular spiral and web-thinned point for reduced thrust and cleaner entry. Coolant-through capability supports high-feed machining operations.

This drill bit is suited for CNC machining centers, drill presses, and screw machine setups where short overhang and rigidity are required. Its universal primary workpiece material rating means it performs across steel, stainless, aluminum, cast iron, and non-ferrous alloys. The 4-margin straight-cylindrical shank with a 0.3900 inch shank diameter seats directly in standard collets and drill chucks. It is a fit for job shops, production machining operations, and tool-and-die environments where consistent hole quality and tight diameter tolerance are required. The Series 142P designation identifies this as an SGS high-performance production drill within their micrograin carbide line.

Key Features

• Solid micrograin carbide construction for rigidity and edge retention at high cutting speeds
• Ti-NAMITE-X coating for reduced friction, extended tool life, and improved chip evacuation
• 135-degree web-thinned point reduces entry thrust and eliminates center punch requirement on most materials
• Coolant-through design supports high-pressure internal coolant delivery for deep-hole applications up to 1.85 inches depth
• 4-margin geometry provides superior hole straightness and surface finish
• Tight diameter tolerance of +0.00024 to +0.00083 inch ensures consistent fit in close-tolerance hole applications
• DIN 6537 specification compliance for dimensional standardization

Compatibility

Designed as a screw machine length replacement drill bit for production machining applications requiring a 23/64 inch diameter, straight-cylindrical shank, and DIN 6537 geometry. Fits standard drill chucks and collet systems accepting a 0.3900 inch shank diameter.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or tooling technicians familiar with carbide tooling handling. Carbide is brittle — avoid impact, side-loading, or dropping the bit, as chipping or fracture can occur. Ensure the collet or chuck is clean and concentric before seating the shank, and verify spindle runout is within acceptable limits before high-speed operation. When using the coolant-through feature, confirm the machine spindle and toolholder are rated for internal coolant delivery at the required pressure.