Osg HP255-3307 Solid Carbide Jobber Drill 8.40mm 140 Deg

Product Description

The OSG HP255-3307 is a solid carbide jobber-length drill bit designed for high-performance drilling in ferrous and cast-iron materials. It features an 8.40 mm diameter with a 140-degree point angle and WD1 coating that improves wear resistance and heat dissipation during extended cutting cycles. The R-thinned web reduces thrust force and promotes self-centering on entry. At 103.00 mm overall length with a 61.00 mm flute length, this bit fits standard toolholders accepting a 10.00 mm straight-cylindrical shank. It is installed by machinists and CNC operators working in production or job-shop environments.

This drill is suited for drilling blind holes, cross holes, and through-hole applications in steel, alloy steel, and cast iron. The 5xD flute-to-diameter ratio and coolant-through design support deeper hole drilling without chip packing. It is a strong choice for production drilling where dimensional accuracy and tool life in ferrous materials are priorities. The HP255 series is built for general high-performance drilling operations in industrial machining environments.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous materials
• WD1 coating extends tool life and reduces built-up edge in steel and cast iron
• 140-degree point angle with R-thinned web for self-centering and reduced entry thrust
• Coolant-through design supports chip evacuation in blind-hole and deep-hole drilling
• 5xD flute-to-diameter ratio handles moderate depth-to-diameter drilling requirements
• Straight-cylindrical 10.00 mm shank compatible with standard collet and hydraulic toolholders

Compatibility

Designed for use in CNC machining centers and drill presses accepting a 10.00 mm straight-cylindrical shank. Primary workpiece materials are steel, alloy steel, and cast iron (ISO material codes P and K). Suitable for blind hole, cross hole, general drilling, and self-centering applications within the HP255 series range of 8.00 mm to 9.00 mm diameter.

Installation Notes

Install and remove drill bits only with the spindle fully stopped and machine power locked out per applicable shop safety procedures. Seat the shank fully in the collet or toolholder and verify runout before starting a cut. Ensure coolant-through supply pressure and flow are compatible with the machine spindle before enabling internal coolant. Inspect the cutting edges and web thinning for chipping before each use, as carbide tools are brittle and should not be used if edge damage is visible.