Starrett 54477 O1 Tool Steel Flat Stock 3/4x1x36 in

Product Description

The STARRETT 54477 is an O1 oil-hardening tool steel flat stock bar sized at 0.75 inches thick, 1 inch wide, and 36 inches long. Manufactured to AISI Type O1 specifications, this flat stock is supplied in the annealed condition, ready for machining, grinding, and heat treating by tool and die makers, machinists, and metalworking professionals. The piece holds a thickness tolerance of plus or minus 0.001 inches and a squareness of 0.003 inches per inch on all edges, making it well suited for precision tooling applications where dimensional consistency is critical before hardening.

O1 tool steel flat stock of this size is commonly used in shop and industrial environments for fabricating punches, dies, gauges, fixtures, and cutting tools. The 36-inch length provides a useful working bar for layout and cutting to required blanks. Machinists and tool and die makers working in job shops, maintenance facilities, and manufacturing operations will find this stock appropriate for general-purpose tooling where oil-hardening characteristics and moderate toughness are required.

Key Features

• AISI Type O1 oil-hardening tool steel material specification
• Thickness tolerance of plus or minus 0.001 inches for precise fitment before machining
• Width tolerance of 0.000 to 0.005 inches (negative only)
• Length tolerance of plus 0.015 inches
• Edge squareness held to 0.003 inches per inch on all sides
• 36-inch bar length suitable for cutting multiple blanks from a single piece

Compatibility

Designed as a general-purpose O1 oil-hardening tool steel flat stock for machining, grinding, and heat-treating applications in tool and die, fixture, and precision tooling fabrication work.

Installation Notes

Machining and heat treating of tool steel flat stock should be performed by qualified machinists or tool and die makers using appropriate metalworking equipment. Always allow the bar to reach a stable temperature before precision grinding or measuring. Follow established AISI O1 heat-treating guidelines for hardening and tempering cycles, including proper quenching in oil. Handle with care after heat treatment as hardened tool steel is brittle and susceptible to edge chipping.