Osg 8595138 Screw Machine Drill Bit 1.38 Mm Hss 140pt

Product Description

The OSG 8595138 is a screw machine length drill bit designed for high-performance drilling in metalworking and machining applications. Built from high speed steel with a coated finish, this bit measures 1.38 mm in diameter with a 140-degree faceted point for fast penetration and accurate starting. The overall length is 41 mm (approximately 1.614 inches) with a 3 mm straight-cylindrical shank. The web-thinned, tapered web configuration reduces cutting resistance and improves chip evacuation. This bit is a practical choice for machinists, tool-and-die technicians, and precision metalworkers requiring consistent, repeatable results in short-length drilling operations.

The OSG 8595138 is suited for drilling in steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate. Its screw machine length body keeps the bit rigid and reduces deflection, making it well-matched for drill press, CNC, and benchtop machining center applications where hole position accuracy and finish quality matter. The 5xD flute-to-diameter ratio supports effective chip clearance during deeper passes relative to bit diameter.

Key Features

• 1.38 mm cutting diameter with a tolerance of +0 to -0.014 mm for precision fitment
• 140-degree faceted point reduces walking and improves entry accuracy
• High speed steel construction with coated finish for extended tool life
• Web-thinned tapered web lowers thrust requirements and aids chip flow
• Screw machine length body provides added rigidity over jobber-length alternatives
• Right-hand spiral flute with 2 flutes for balanced cutting in ferrous and non-ferrous materials

Compatibility

Designed as an OEM-style replacement and standard-service drill bit for use in screw machine, CNC drilling, and benchtop press applications requiring a 1.38 mm diameter, straight-cylindrical shank bit in the OSG Series 1100 line.

Installation Notes

Installation and use should be performed by qualified machinists or tool technicians familiar with rotary cutting tool safety. Secure the shank fully in the chuck or collet before operation and verify runout is within acceptable limits. Power down the machine and lock out all energy sources before changing or inspecting the bit. Do not exceed the recommended feed and speed parameters for the workpiece material being drilled.