Drill Rod Tool Steels 66820 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 66820 is an O1 oil-hardening tool steel flat bar cut to 3/16 inches thick, 2 inches wide, and 36 inches long. O1 is a general-purpose tool steel known for good machinability in the annealed state and consistent response to oil quench hardening. This flat stock is supplied to tight dimensional tolerances, making it suitable for fabricating punches, dies, cutting tools, gauges, and other precision tooling components. Machinists, tool-and-die makers, and industrial maintenance technicians work with this material when dimensional accuracy and predictable heat treatment response are required.

This flat stock is used in machine shops, toolrooms, and industrial fabrication environments where oil-hardening tool steel is specified. Typical applications include blanking dies, form tools, knife blades, reamers, and fixture components. The 36-inch length provides a workable starting blank for most benchtop and knee-mill operations. At 3.87 pounds per piece, individual handling is straightforward for single-operator work.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent heat treatment response
• Tight thickness tolerance of plus or minus 0.001 inches for precision tooling applications
• Width tolerance of plus 0.005 inches, minus 0.000 inches
• Length tolerance of plus 0.5 inches
• Squareness held to 0.003 inches on edges and 0.004 inches per inch of thickness on ends
• Supplied in annealed condition, ready for machining prior to hardening

Compatibility

Designed as a standard AISI Type O1 oil-hardening tool steel flat bar suitable for general toolmaking and die-making applications where O1 specification material is required.

Installation Notes

Cutting, grinding, and machining should be performed in the annealed state before heat treatment. Oil hardening requires controlled furnace heating followed by an oil quench - this work should be performed by qualified heat-treating personnel following established metallurgical procedures. Always use appropriate eye protection, gloves, and ventilation when grinding or cutting tool steel stock. Consult applicable shop safety codes and material data sheets before processing.