Drill Rod Tool Steels 66739 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 66739 is an O1 oil-hardening tool steel flat bar cut to a nominal 0.125-inch thickness, 2-inch width, and 18-inch length. O1 is a general-purpose oil-hardening tool steel conforming to AISI Type O1 specification, valued by machinists and toolmakers for its dimensional stability, moderate toughness, and good machinability in the annealed state. Thickness tolerance is held to plus or minus 0.001 inches, width tolerance is plus 0.005 inches to zero, and length tolerance is plus 0.25 inches. This flat stock ships at approximately 1.29 pounds per piece, making it practical to handle and size on a mill or surface grinder.

This flat bar is suited for toolroom applications including the fabrication of punches, dies, jigs, fixtures, gauges, and cutting tools. It is used in job shops, tool-and-die operations, and maintenance departments where a reliable, dimensionally controlled tool steel flat is required. The annealed condition allows conventional machining before hardening and tempering. Typical end users include tool and die makers, machinists, and maintenance technicians in industrial and manufacturing settings.

Key Features

• AISI Type O1 oil-hardening tool steel for good machinability and dimensional stability during heat treatment
• Thickness tolerance of plus or minus 0.001 inches for precision fitment in toolroom work
• Width tolerance of plus 0.005 inches to zero, length tolerance of plus 0.25 inches
• Squareness held to 0.003 inches on edge and 0.004 inches per inch of thickness on end
• Ships in annealed condition, ready for machining prior to oil-hardening heat treatment
• Single-piece minimum order quantity for low-volume toolroom and prototype needs

Compatibility

Designed as a standard AISI Type O1 oil-hardening tool steel flat stock suitable for general toolroom and die-making applications requiring a 0.125-inch by 2-inch cross section.

Installation Notes

Machining and heat treatment of tool steel flat stock should be performed by qualified machinists or tool-and-die professionals using appropriate personal protective equipment. Always anneal or verify annealed condition before heavy stock removal. Oil-hardening heat treatment requires controlled furnace temperatures and a suitable quenching oil bath - follow the material supplier heat-treat data sheet for O1 tool steel. Grinding operations on hardened tool steel require adequate coolant flow to prevent surface burning and stress cracking.