Starrett 54530 O1 Tool Steel Flat Stock 1.5x2x36 in

Product Description

The STARRETT 54530 is an O1 oil-hardening tool steel flat stock bar sized at 1-1/2 inches thick, 2 inches wide, and 36 inches long. Manufactured to AISI Type O1 specification, this flat stock is ground to close tolerances, making it suitable for toolmakers, machinists, and die makers who need consistent dimensions before hardening operations. The material holds a thickness tolerance of plus or minus 0.001 inches and a length tolerance of plus 0.015 inches, with a width tolerance of 0.000 to 0.005 inches negative. At 30.6 pounds, the bar is substantial and sized for larger tooling or fixture work.

O1 tool steel flat stock is used in machine shops, tool and die operations, and maintenance facilities where precision blanks are needed for punches, dies, gauges, and cutting tools. This bar is supplied in an annealed condition, ready for rough machining before oil-quench hardening. Typical users include tool and die makers, mold makers, and industrial maintenance machinists working on custom tooling fabrication or replacement of worn tooling components.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent hardenability in oil-quench operations
• Thickness tolerance of plus or minus 0.001 inches for precise stock removal planning
• Width tolerance of 0.000 to negative 0.005 inches, length tolerance of plus 0.015 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Weighs 30.6 pounds — sized for larger tooling blanks, dies, or fixture plates
• Supplied as a single 36-inch bar ready for layout and machining

Compatibility

Designed as a general-purpose O1 oil-hardening tool steel flat stock blank for use in tool and die fabrication, gauge making, and custom cutting tool applications wherever AISI O1 material specification is required.

Installation Notes

Machining and heat treatment of tool steel should be performed by qualified machinists or tool and die makers familiar with O1 oil-hardening procedures. Always anneal or stress-relieve the material before finish grinding if the stock has been heavily machined. Follow established shop safety procedures when handling large steel bar stock, including use of appropriate lifting equipment for pieces at or near 30 pounds. Heat treatment parameters should be sourced from the material manufacturer or a recognized metallurgical reference — do not estimate hardening temperatures or quench times from memory.