Drill Rod Tool Steels 66731 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 66731 is an O1 oil-hardening tool steel flat stock bar measuring 0.125 inches thick, 0.25 inches wide, and 18 inches long. O1 is an oil-hardening, cold-work tool steel known for its good machinability in the annealed state and excellent edge retention after hardening. This flat stock is supplied to close dimensional tolerances, making it well suited for fabricating punches, dies, blades, gauges, and small tooling components. Machinists, toolmakers, and die makers are the primary users of this material in job shop and precision manufacturing environments.

This flat stock is used in both small-batch job shop work and prototype tooling applications where a readily machinable, oil-hardenable steel is required. The 18-inch length is a standard cut suitable for a wide range of tooling layouts. The piece is sized for applications requiring a thin, narrow profile, such as small die inserts, wear strips, or precision blanks. AISI Type O1 oil-hardening tool steel is a widely specified grade for applications that demand dimensional stability during heat treatment.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent, predictable heat treatment response
• Tight thickness tolerance of plus or minus 0.001 inches for precision fitment
• Width tolerance of plus 0.005 inches, minus 0.000 inches maintains minimum material condition
• Length tolerance of plus 0.25 inches allows for finish-cut stock removal
• 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 oil-hardening heat treat

Compatibility

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

Installation Notes

Cutting, grinding, and machining should be performed in the annealed state before heat treatment. Oil hardening should be performed by a qualified heat treater following established procedures for AISI O1 tool steel. Use appropriate personal protective equipment when cutting or grinding tool steel. Always allow the material to reach ambient temperature before taking final dimensional measurements.