Chicago-latrobe 50461 Extra Length Drill Bit 0.125 in Hss

Product Description

The CHICAGO-LATROBE 50461 is a Series 120X extra length high speed steel drill bit designed for long-reach drilling applications where standard-length bits cannot access the work zone. Built from high speed steel with an oxide finish, this bit measures 0.125 inches in diameter and carries a 118-degree notched point angle. The 12-inch overall length paired with a 9-inch spiral flute gives machinists, fabricators, and maintenance technicians the reach needed to bore through deep sections, stacked material, or confined-access fixtures. A web-thinned, tapered-web construction reduces thrust and improves chip evacuation at the cutting tip.

This bit is suited for general-purpose drilling in cast iron and steel across industrial, maintenance, and fabrication environments. The straight-cylindrical shank accepts standard drill chucks without adapters, making it compatible with bench-top drill presses, magnetic drills, and hand-held electric drills. The right-hand cutting direction and regular spiral flute geometry make it a dependable choice for production drilling and one-off repair tasks where depth of cut exceeds the reach of jobber-length tooling.

Key Features

• Extra length design: 12-inch overall length with 9-inch flute length for deep-reach applications
• High speed steel construction for durability in cast iron and steel workpieces
• 118-degree notched point angle reduces walking and improves starting accuracy
• Web-thinned tapered web lowers cutting thrust and promotes chip clearance
• Oxide finish provides mild corrosion resistance and reduces friction at the cutting edge
• Straight-cylindrical shank fits standard drill chucks without special adapters

Compatibility

Designed for general-purpose long-reach drilling in cast iron and steel. Primary workpiece materials listed by the manufacturer are cast iron and steel. Fits any standard drill chuck accepting a 0.125-inch straight-cylindrical shank.

Installation Notes

Installation is performed by machinists, tool-and-die technicians, or maintenance mechanics using a drill press, magnetic drill, or hand-held electric drill. Secure the shank firmly in the chuck before operation and confirm the workpiece is clamped or fixtured to prevent movement. Use appropriate cutting fluid or coolant for steel workpieces to extend tool life and control heat buildup. Inspect the cutting edges for wear before each use, as a dull tip on an extra-length bit increases deflection risk.