Osg HP258-1417 Taper Length Drill Bit 0.1417 in Solid Carbide

Product Description

The OSG HP258-1417 is a solid carbide taper length drill bit designed for precision drilling in demanding industrial and machining applications. It measures 0.1417 inches (3.60 mm) in diameter with an overall length of approximately 3.03 inches (77.00 mm) and a flute length of approximately 1.42 inches (36.00 mm). The 140-degree split point with R-thinned geometry reduces walking and thrust force at entry. The WD1 coating improves wear resistance and heat dissipation. Coolant-through capability supports high-speed drilling in deep-hole operations where chip evacuation and thermal management are critical. This bit is suited for machinists, tool and die makers, and CNC operators working in production environments.

The HP258-1417 is intended for use in CNC machining centers, drill presses, and manual lathes where tight-tolerance hole making is required. The 8xD flute-length-to-diameter ratio makes it well suited for deeper holes relative to its diameter. Right-hand spiral flute geometry supports standard right-hand cutting operations. The taper length body provides added reach compared to jobber-length bits without sacrificing rigidity. Typical applications include aerospace components, mold and die work, and precision metalworking where carbide tooling is specified.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• 140-degree R-thinned point reduces entry thrust and improves self-centering
• WD1 coating enhances surface hardness and extends tool life
• Coolant-through design supports chip evacuation in deep-hole drilling
• 8xD flute length ratio for increased reach in taper length applications
• Right-hand spiral flute for standard CNC and manual machining setups

Compatibility

Designed as an OEM-style replacement or production drill bit for use in standard taper length drill applications requiring a 4.00 mm shank diameter and solid carbide tooling.

Installation Notes

Installation should be performed by qualified machinists or CNC technicians familiar with toolholder specifications and runout tolerances. Ensure the shank is fully seated and properly torqued in the collet or chuck before operation. Verify spindle RPM and feed rate settings are appropriate for the workpiece material and bit diameter before engaging the cut. Do not exceed the rated flute depth for chip clearance in blind-hole applications.