Osg 8609151 Screw Machine Drill Bit 29/64 in Xpm

Product Description

The OSG 8609151 is a screw machine length drill bit designed for high-performance metal drilling in demanding shop and production environments. Built from XPM high-speed steel with a coated finish, this bit measures 29/64 inch (0.4531 inches) in diameter and features a 130-degree drill point angle suited for work on harder ferrous materials. With a straight-cylindrical shank and two spiral flutes, it installs readily into standard drill chucks and CNC toolholders. The overall length is 104.00 mm and the shank diameter is 12.00 mm. Machinists and tool-and-die professionals select this bit for its stub-length rigidity and consistent dimensional tolerance.

The OSG 8609151 is intended for drilling steel, alloy steel, cast iron, and nickel alloy workpieces in production machining, maintenance, and repair operations. The screw machine (stub) length format provides increased rigidity compared to jobber-length bits, making it well suited for drill press, turret lathe, and CNC machining center applications where chatter control and hole accuracy are priorities. The Series 1900 designation places it within OSG's high-performance stub drill line.

Key Features

• XPM high-speed steel construction with coated finish for extended tool life on ferrous materials
• 130-degree split point angle reduces walking and improves entry on steel and cast iron
• R-thinned web with tapered web configuration lowers thrust requirements and improves chip evacuation
• Right-hand cut, regular spiral, two-flute geometry for standard through-hole drilling
• Straight-cylindrical shank accepts standard drill chucks and collet holders
• Stub screw machine length format provides added rigidity versus jobber-length bits

Compatibility

Designed as a screw machine length replacement drill bit for use in standard drill presses, turret lathes, and CNC machining centers accepting a 12.00 mm straight shank. Primary workpiece materials are steel, alloy steel, cast iron, and nickel alloy, within the 0.4500 to 0.5000 decimal inch diameter range.

Installation Notes

Installation is performed by machining professionals using a compatible drill chuck or collet system rated for the shank diameter. Secure the shank fully within the chuck or collet and verify runout before cutting. Ensure the workpiece is firmly fixtured and the machine spindle is at a safe stop before inserting or removing the bit. Follow applicable shop safety practices and machine manufacturer guidelines for speed and feed selection when working with steel and nickel alloys.