Osg HP253-1563 Carbide Screw Machine Drill Bit 5/32 in

Product Description

The OSG HP253-1563 is a solid carbide screw machine length drill bit designed for high-performance drilling in ferrous materials. Built to the HP253 series standard, it features a 140-degree split point with R-thinned web geometry that reduces entry force and improves hole accuracy. The straight-cylindrical shank measures 6.00 millimeters in diameter and seats securely in standard drill chucks and quick-change toolholders. Coolant-through capability supports chip evacuation and thermal management at elevated feed rates. This bit is sized at 5/32 inch (0.1562 inches) and is intended for use by machinists, tool-and-die professionals, and CNC operators working in production environments.

The HP253-1563 is suited for drilling in steel, alloy steel, and cast iron in screw machine, CNC lathe, and machining center applications. The screw machine length format provides increased rigidity over jobber-length bits, making it a practical choice for short-hole drilling where runout control and positional accuracy matter. The 3xD flute-to-diameter ratio keeps the tool compact while maintaining adequate chip clearance. It is commonly used in short-run and production drilling operations where tool life and repeatability are critical.

Key Features

• Solid carbide construction for extended tool life in ferrous workpiece materials
• 140-degree drill point angle with R-thinned, tapered web for reduced thrust and clean entry
• Coolant-through design supports chip evacuation and heat control at the cutting edge
• Screw machine length (3xD flute ratio) provides rigidity advantage over jobber-length alternatives
• Right-hand cut, regular spiral flute geometry suitable for steel and cast iron
• Straight-cylindrical shank compatible with standard drill chucks and collet toolholders

Compatibility

Designed for use in steel, alloy steel, and cast iron workpieces. Compatible with standard straight-shank drill chucks and collet holders accepting a 6.00 millimeter shank diameter. Fits within the 0.1500 to 0.2000 decimal inch drill bit size range of the HP253 series.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with carbide cutting tool handling. Ensure the machine spindle and toolholder are clean and free of debris before seating the shank to prevent runout. Carbide is brittle — avoid dropping or lateral impact. When coolant-through functionality is used, verify that the machine tool's coolant system pressure and flow rate are compatible with the tool before engaging the spindle.