Osg 8595345 Screw Machine Drill Bit 0.136 in Hss

Product Description

The OSG 8595345 is a screw machine length drill bit designed for high-performance drilling in metalworking and fabrication applications. It measures 0.136 inches (Wire Size 29, 3.45 mm) in diameter with a straight-cylindrical shank and a 130-degree faceted drill point. Built from high speed steel with a coated finish, this bit is web-thinned with a tapered web configuration to reduce thrust and improve chip evacuation. The two-flute, regular spiral design delivers consistent cutting action in demanding production environments. Overall length is approximately 2.05 inches (52 mm), with a shank diameter of approximately 0.157 inches (4 mm) and a flute length of approximately 0.787 inches (20 mm).

This screw machine length bit is suited for close-tolerance drilling operations in steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. Its compact body length makes it ideal for drill press, CNC, and turret lathe setups where rigidity and minimal deflection are critical. The Series 1100 designation places it in OSG's high-performance drill line, making it a practical choice for production shops, tool rooms, and maintenance environments that require repeatable hole quality in ferrous and non-ferrous metals.

Key Features

• Wire Size 29 diameter (0.136 inches / 3.45 mm) with a diameter tolerance of +0 to -0.018 mm for close-tolerance work
• 130-degree faceted drill point reduces walking and improves entry accuracy on flat and curved surfaces
• Web-thinned, tapered web lowers cutting thrust and extends tool life in production drilling
• High speed steel construction with coated finish for improved wear resistance and heat dissipation
• Screw machine (stub) length body increases rigidity and minimizes deflection compared to jobber-length bits
• Right-hand cut, two-flute spiral design compatible with standard drill press and CNC spindle rotation

Compatibility

Designed for use in standard straight-shank drill chucks and collet systems accepting a 4 mm (approximately 0.157 inches) shank diameter. Suitable for drilling steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces in production and maintenance machining setups.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom personnel familiar with drill bit geometry and cutting parameters. Secure the shank fully in the chuck or collet before operation and verify spindle runout is within acceptable limits for the required hole tolerance. Always power down and de-energize the machine before changing tooling. Follow applicable shop safety standards and machine manufacturer guidelines when selecting feeds and speeds for the workpiece material.