Osg HP255-4567 Solid Carbide Jobber Drill Bit 11.6 Mm

Product Description

The OSG HP255-4567 is a solid carbide jobber-length drill bit engineered for high-performance drilling in steel, alloy steel, and cast iron. It carries a 140-degree point angle with an R-thinned web geometry that promotes self-centering and reduces thrust on entry. The WD1 coating adds surface hardness and heat resistance, extending tool life in demanding ferrous machining environments. At 118 mm overall length with a 71 mm flute length, this bit runs a 5xD flute-to-diameter ratio suited for reaching blind holes and cross holes without sacrificing rigidity. Machinists and tool-room operators working in production or job-shop settings will find it well matched to CNC and manual drilling operations.

The HP255-4567 targets applications in ferrous metals, specifically steel, alloy steel, and cast iron in both production and maintenance machining contexts. Its straight-cylindrical shank with a 12 mm shank diameter seats directly in standard drill chucks and collet holders without adapters. Designed for blind hole, cross hole, general drilling, and self-centering work, this bit handles the application range typical of tooling used in precision fabrication, mold making, and general metalworking shops. The right-hand spiral flute promotes consistent chip evacuation during through and blind-hole cuts.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous materials
• WD1 coating for elevated heat resistance and extended tool life
• 140-degree point angle with R-thinned web for self-centering and reduced thrust
• Coolant-through design supports flushing chips and controlling heat in deep or tight-tolerance holes
• 5xD flute-to-diameter ratio balances reach and stiffness for blind and cross-hole work
• Straight-cylindrical 12 mm shank fits standard chucks and collet systems without adapters

Compatibility

Designed as an OSG Series HP255 jobber-length drill bit for use in steel, alloy steel, and cast iron workpieces across standard CNC machining centers and manual drilling equipment equipped with a compatible chuck or collet accepting a 12 mm straight shank.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the straight shank fully into the chuck or collet holder and verify runout before beginning a cut. When using the coolant-through capability, confirm that the machine's internal coolant system pressure and flow rate are compatible with the tool before operation.