Osg HP258-1654 Taper Length Drill Bit 0.1654 in Carbide

Product Description

The OSG HP258-1654 is a solid carbide taper length drill bit designed for precision drilling in demanding industrial and machining applications. Featuring a 0.1654-inch (4.20 mm) cutting diameter and a 140-degree drill point angle with an R-thinned point, this bit delivers clean entry and reduces thrust in tough materials. The WD1 coating provides enhanced wear resistance for extended tool life in high-cycle production environments. At an overall length of 85.00 mm with a flute length of 45.00 mm, the HP258-1654 offers the extra reach needed for deeper hole applications beyond standard jobber-length drills. A 6.00 mm shank diameter and 8xD flute-to-diameter ratio complete the geometry. Coolant-through capability supports high-speed machining with external or internal coolant systems.

This taper length drill bit is suited for CNC machining centers, drill presses, and manual machines where extended reach or deeper hole depths are required. The right-hand spiral flute with regular spiral type promotes efficient chip evacuation in ferrous and non-ferrous metals, composites, and hardened alloys. It is appropriate for production shops, tool-and-die operations, aerospace fabrication, and precision metal fabrication environments where solid carbide tooling is specified for consistent hole quality and dimensional accuracy.

Key Features

• Solid carbide construction for high rigidity and wear resistance in demanding materials
• 140-degree drill point angle with R-thinned point for reduced thrust and accurate self-centering
• WD1 coating for extended tool life and improved surface finish in metal cutting
• Coolant-through design compatible with internal coolant spindle systems
• 8xD flute-to-diameter ratio provides taper length reach for deeper hole applications
• Right-hand cut with regular spiral flute for positive chip evacuation

Compatibility

Designed as an OEM-style taper length drill bit for use in CNC machining centers and drill presses accepting a 6.00 mm straight shank carbide drill.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Verify the collet or chuck size matches the 6.00 mm shank diameter before seating the drill. When using coolant-through capability, confirm the coolant system pressure and flow rate are compatible with the machine spindle before operation.