Drill Rod Tool Steels 57820 O1 Oil-hardening Flat Stock

Product Description

The DRILL ROD TOOL STEELS 57820 is an O1 oil-hardening flat stock bar cut to 3/4 inch thick, 4 inches wide, and 18 inches long. O1 tool steel is a general-purpose oil-hardening grade known for its dimensional stability during heat treatment and good machinability in the annealed state. This flat stock ships in the soft, annealed condition, ready for machining to final dimensions before hardening. It suits toolmakers, machinists, and die makers who need a reliable oil-hardening steel for punches, dies, gauges, and similar tooling components. Weight is approximately 15.47 pounds per piece.

O1 flat stock in this size is commonly used in tool and die shops, job shops, and maintenance departments. Typical applications include fabricating blanking dies, forming tools, drill jigs, and precision gauges where close dimensional tolerances are required. The 3/4 inch thickness and 4 inch width make this bar suited to medium-scale tooling work in both production and prototype environments. Machinists and tool and die makers are the primary installers and fabricators of parts made from this material.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent heat-treat response
• Annealed flat stock ready for machining prior to hardening
• Thickness tolerance of plus or minus 0.001 inches for close-tolerance work
• Width tolerance of plus 0.005 inches, minus 0.000 inches
• Length tolerance of plus 0.25 inches
• Squareness held to 0.003 inches on edges and 0.004 inches per inch of thickness on ends

Compatibility

Designed as a standard O1 oil-hardening tool steel flat bar suitable for general tooling, die making, and precision machining applications requiring an oil-hardening grade material.

Installation Notes

Machining and heat treatment of tool steel should be performed by qualified machinists or tool and die makers following established shop practices. Always follow appropriate hardening and tempering procedures for AISI O1 tool steel as outlined by the material manufacturer or a recognized metallurgical reference. Use proper personal protective equipment when cutting, grinding, or heat-treating tool steel. Secure the workpiece firmly before machining to maintain dimensional accuracy.