Starrett 54183 O1 Tool Steel Flat Stock 0.625x6x18 in

Product Description

The STARRETT 54183 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured to AISI Type O1 material specification, this flat stock measures 0.625 inches thick, 6 inches wide, and 18 inches long with tightly controlled tolerances throughout. Thickness tolerance is held to plus or minus 0.001 inches, width tolerance runs from 0 to 0.005 inches, and length tolerance is plus 0.25 inches. Edge squareness is maintained at 0.003 inches per inch across all edges. Machinists, tool and die makers, and fabricators use this stock to produce punches, dies, gauges, and other precision tooling components that require predictable oil-hardening heat treatment response.

O1 tool steel flat stock in this size range is commonly used in job shops, tool rooms, and production facilities where close-tolerance blanks are needed before final grinding and heat treatment. The 0.625 inch thickness and 6 inch width make this bar well suited for larger die sections, wear plates, and fixture components. It is delivered in the annealed condition, making it readily machinable before hardening. Professionals working in precision manufacturing, mold making, and custom tooling will find this stock appropriate for applications that require a reliable, well-documented oil-hardening steel.

Key Features

• AISI Type O1 oil-hardening tool steel material specification
• Thickness tolerance of plus or minus 0.001 inches for precise stock removal planning
• Width tolerance held from 0 to 0.005 inches
• Length tolerance of plus 0.25 inches
• Edge squareness maintained at 0.003 inches per inch on all edges
• Delivered in annealed condition for machinability prior to heat treatment

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat bar suitable for general toolroom and die-making applications where this material specification and size are required.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed using equipment and tooling rated for hardened or semi-hardened steel materials. Heat treatment of O1 tool steel requires controlled oil-quench procedures and should be carried out by qualified personnel following established metallurgical guidelines. Wear appropriate personal protective equipment when cutting or grinding. Consult material safety data sheets for handling guidance related to metal chips and grinding dust.