Starrett 54232 O1 Tool Steel Flat Stock 1-1/4x2x18 in

Product Description

The STARRETT 54232 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who need a ground, precision-tolerance blank ready for layout, machining, or heat treating. Manufactured to AISI Type O1 specifications, this flat stock measures 1-1/4 inches thick by 2 inches wide by 18 inches long and weighs 12.75 pounds. Thickness and squareness tolerances are held to plus or minus 0.001 inches, making it suitable for precision tooling applications where dimensional consistency matters before and after heat treatment.

O1 tool steel flat stock is used in shops producing punches, dies, gauges, bushings, and general tooling fixtures. This bar is appropriate for both job shop and production environments where a reliable, oil-hardening grade is specified. The 18-inch length provides enough stock for multiple smaller tool blanks or a single longer component, and the 1-1/4 by 2 inch cross section suits medium to heavy tooling work. Licensed machinists and tool and die makers are the primary installers and end users of this material.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable, controlled heat treatment response
• Thickness tolerance of plus or minus 0.001 inches for precision blank preparation
• Width tolerance of 0.000 to 0.005 inches under nominal for consistent stock removal planning
• Length tolerance of plus 0.250 inches, zero minus, ensuring full usable length
• Edge squareness held to 0.003 inches per inch across all edges
• Ready-to-machine condition suitable for layout, milling, grinding, and EDM operations

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat stock blank compatible with conventional machining, surface grinding, and oil-quench heat treating processes used in tool and die fabrication.

Installation Notes

Cutting and machining of tool steel flat stock should be performed by qualified machinists using appropriate coolant and tooling rated for high-carbon tool steels. Secure the workpiece firmly before any sawing, milling, or grinding operation to prevent movement and maintain dimensional accuracy. Heat treating to final hardness should follow the material supplier recommendations for O1 steel and be performed by qualified personnel using properly calibrated equipment. Always wear appropriate PPE including eye protection and gloves when handling and cutting steel bar stock.