Drill Rod Tool Steels 66797 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 66797 is an O1 oil-hardening tool steel flat stock bar measuring 3/32 inches thick, 3/4 inches wide, and 36 inches long. Conforming to AISI Type O1 specifications, this flat stock is used by machinists, toolmakers, and die makers who require a machinable, weldable steel that hardens predictably in an oil quench. The stock ships in an annealed condition, ready for machining and subsequent heat treatment. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for precision tooling applications where dimensional consistency before hardening matters. The piece weighs approximately 0.73 pounds.

O1 tool steel flat stock is a standard material in job shops, maintenance departments, and tooling rooms. It is commonly used to produce punches, dies, gauges, blades, and small fixtures. The 36-inch length suits both full-length tooling blanks and cut-to-size work. This grade is well suited to light cutting tool fabrication and general-purpose tooling where extreme abrasion resistance is not the primary requirement. It is machined with conventional HSS or carbide tooling in its annealed state prior to hardening.

Key Features

• AISI Type O1 oil-hardening tool steel - predictable hardening response in an oil quench
• Tight thickness tolerance of plus or minus 0.001 inches for dimensional accuracy before heat treat
• 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
• Ships annealed and ready for machining

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat blank suitable for general toolmaking, die work, and precision machining applications requiring oil-quench heat treatment.

Installation Notes

Machining and heat treatment of tool steel should be performed by qualified machinists or tool and die makers familiar with O1 processing requirements. Secure workpieces properly before cutting or grinding to prevent movement. Heat treatment, including hardening and tempering, must follow established metallurgical procedures for O1 steel and should be performed by personnel with appropriate equipment and training. Grinding after hardening produces heat that can affect surface temper if coolant flow is inadequate.