Osg 8595255 Screw Machine Drill Bit 2.55mm Tin Hss

Product Description

The OSG 8595255 is a screw machine length drill bit designed for high-performance drilling in steel, stainless steel, aluminum, and other non-ferrous materials. Built from vanadium high speed steel and finished with a TiN (titanium nitride) coating, it offers extended tool life and reduced friction at the cutting edge. The 130-degree, 4-facet point geometry with web thinning promotes accurate hole entry and reduces thrust force. At 46.00 mm overall length with a 14.00 mm flute length, this compact stub-style bit is suited for CNC machining centers, drill presses, and manual operations where rigidity and precision matter.

This drill bit is used in production machining and maintenance environments where shorter, stiffer tooling is preferred over jobber-length bits. The 2.55 mm diameter and straight cylindrical shank make it compatible with standard collet chucks and drill chucks. Its regular spiral flute geometry handles chip evacuation in a range of materials including mild steel, stainless, and aluminum alloys. The 5xD flute-to-diameter ratio keeps the tool body rigid in short-reach applications. This bit is typically run by machinists, tool and die technicians, and maintenance mechanics.

Key Features

• TiN coating reduces friction and extends cutting edge life compared to uncoated HSS
• 130-degree 4-facet point with web thinning for accurate hole entry and lower thrust
• Vanadium high speed steel construction for durability in ferrous and non-ferrous applications
• Screw machine (stub) length provides increased rigidity over jobber-length bits
• Right-hand cutting, regular spiral flute for positive chip removal
• Straight cylindrical shank fits standard collet and drill chuck systems

Compatibility

Designed as an OEM-style screw machine length drill bit suitable for use in standard drill chucks and collet systems accepting a 3.00 mm straight shank. Compatible workpiece materials include steel, stainless steel, aluminum, and non-ferrous alloys as stated by the manufacturer.

Installation Notes

Installation and operation should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tools. Secure the shank fully in the chuck or collet before operation and verify runout before beginning a cut. Always follow machine manufacturer guidelines for spindle speed and feed rate for the workpiece material. Eye protection and appropriate chip guarding are required during use.