Osg 10328105 Screw Machine Drill Bit 0.3281 in Cobalt Hss

Product Description

The OSG 10328105 is a screw machine length drill bit designed for high-performance drilling in steel and alloy steel. Built from cobalt high speed steel with a coated finish, it delivers extended tool life in demanding production and maintenance environments. The 130-degree split point reduces walking and thrust load at entry, making it well suited for hard materials. With a straight-cylindrical shank and right-hand spiral flute, this bit fits standard drill chucks and produces clean, consistent holes. Licensed HVAC, plumbing, and mechanical trades as well as metalworking shops rely on this geometry for reliable results in ferrous stock.

This drill bit is intended for use on steel and alloy steel workpieces in screw machine and general production drilling applications. The screw machine length profile — shorter overall length with a compact flute — provides rigidity and accuracy at higher feed rates. It suits benchtop drill presses, CNC machining centers, and handheld power tools where a straight shank is compatible. The 3xD flute-to-diameter ratio supports chip evacuation in moderate-depth holes without coolant-through capability required.

Key Features

• Cobalt high speed steel construction for heat and wear resistance in ferrous materials
• 130-degree drill point angle with R-thinned web reduces entry thrust and minimizes walking
• Right-hand cut with regular spiral flute for efficient chip evacuation
• Screw machine length body provides added rigidity over jobber-length bits
• Straight-cylindrical shank fits standard three-jaw chucks and collets
• Diameter tolerance of plus 0 to minus 0.022 mm ensures close-tolerance hole sizing

Compatibility

Designed as an OEM-style screw machine drill bit compatible with standard straight-shank drill chucks, collets, and spindles across benchtop, floor-standing, and CNC drilling equipment configured for straight-shank tooling.

Installation Notes

Installation and use should be performed by qualified machinists or tradespeople familiar with rotating cutting tools. Secure the shank fully in the chuck and verify runout before drilling. Always power down and lock out the machine before changing bits. Eye protection and appropriate workholding are required; never hold workpieces freehand when drilling metal.