Drill Rod Tool Steels 57970 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 57970 is an O1 oil-hardening tool steel flat stock bar measuring 0.625 inches thick, 0.75 inches wide, and 36 inches long. Manufactured to AISI Type O1 specification, this flat stock is designed for toolmakers, machinists, and die makers who require tight dimensional tolerances and consistent hardenability. The O1 grade responds predictably to oil-quench hardening, making it a go-to material for cutting tools, punches, dies, gauges, and fixtures where dimensional stability after heat treatment is critical. At 4.85 pounds per piece, it is a solid, workable bar suited to precision shop applications.

O1 flat stock in this size is commonly used in tool-and-die shops, machine shops, and maintenance departments for fabricating custom tooling, jigs, blades, and wear parts. The 36-inch length provides a full bar suitable for multiple part blanks. This stock is used by machinists and tool makers working in both production and prototype environments where oil-hardening steel is specified by engineering or shop standard practice.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable, controlled heat treatment response
• Tight thickness tolerance of plus or minus 0.001 inches for precision blank preparation
• Width tolerance of plus 0.005 to minus 0.000 inches maintains consistent stock width
• Length tolerance of plus 0.5 inches on a 36-inch bar allows for part-off and facing allowance
• Edge squareness held to 0.003 inches; end squareness held to 0.004 inches per inch of thickness
• Ready-to-machine surface condition suitable for direct layout and cutting operations

Compatibility

Designed as a standard O1 oil-hardening tool steel flat bar for general tool-and-die, machining, and fabrication applications requiring AISI Type O1 material specification.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists or toolmakers using appropriate equipment and personal protective equipment. Heat treatment, including oil quenching and tempering, must follow established metallurgical procedures for AISI O1 and should be performed by personnel experienced with tool steel processing. Always allow the bar to reach a stable temperature before precision measurement. Consult applicable shop safety standards and material safety data for tool steel handling and heat treat operations.