Drill Rod Tool Steels 57978 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 57978 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, jig fabrication, and precision machining applications. It measures 0.625 inches thick, 6 inches wide, and 36 inches long, and weighs 38.66 pounds. O1 tool steel is valued for its dimensional stability through the hardening process and its ability to hold a sharp edge after heat treatment. Thickness tolerance is held to plus or minus 0.001 inches, making this stock well-suited for applications where tight dimensional control is required before and after machining. Machinists, tool and die makers, and metalworking shops are the primary users of this material.

This flat stock is used in fabricating punches, dies, gauges, knives, and other precision tooling components. The oil-hardening grade is appropriate for shop environments where a water-quench process is not preferred, as O1 responds well to oil quench with reduced distortion risk compared to water-hardening grades. The 6-inch width and 36-inch length make this bar suitable for cutting multiple blanks from a single piece, reducing material waste in production tooling scenarios. Metalworking shops and tool rooms performing general-purpose tooling work will find this size practical for a wide range of projects.

Key Features

• AISI Type O1 oil-hardening tool steel construction for predictable heat-treat response
• Thickness tolerance of plus or minus 0.001 inches for tight dimensional control
• Width tolerance of plus 0.005 inches, minus 0.000 inches
• Length tolerance of plus 0.5 inches
• Squareness: edge 0.003 inches, end 0.004 inches per inch of thickness
• 36-inch length supports multiple blank cuts from a single bar

Compatibility

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

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists or tool and die makers using appropriate metalworking equipment. Follow standard shop safety practices including the use of eye protection and appropriate cutting fluids. Heat treatment, including oil quenching and tempering, should be performed according to established procedures for AISI O1 tool steel and carried out by personnel familiar with metallurgical requirements. Always verify final dimensions after machining and before heat treatment.