Starrett 54307 O1 Tool Steel Flat Stock 3x36 in

Product Description

The STARRETT 54307 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, punches, and precision machining applications. Measuring 0.125 inches thick, 3 inches wide, and 36 inches long, this flat stock is manufactured to AISI Type O1 material specification. The tight thickness tolerance of plus or minus 0.001 inches makes it suitable for applications where dimensional accuracy is critical before and after hardening. At 4.47 pounds, the bar is a standard stock length used by tool and die makers, machinists, and maintenance shops for fabricating custom tooling components.

O1 tool steel flat stock is used in both production and maintenance environments where a reliable, oil-hardening steel is needed for making jigs, fixtures, gauges, blades, and cutting tools. The 36-inch length provides sufficient material for most shop-floor toolmaking tasks. This bar ships as a single piece and is intended for professional use in machine shops, tool rooms, and fabrication facilities where O1 is the specified grade.

Key Features

• AISI Type O1 oil-hardening tool steel construction for consistent hardenability
• Thickness tolerance of plus or minus 0.001 inches for precision fitment before heat treatment
• Width tolerance of 0.000 to minus 0.005 inches ensures predictable material removal during machining
• Length tolerance of plus 0.015 inches provides slight overstock for facing to final dimension
• Squareness held to 0.003 inches per inch on all edges
• Standard 36-inch bar length suits most toolmaking and die-making stock requirements

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock bar suitable for toolmaking, die making, fixture fabrication, and general precision machining applications where AISI Type O1 material is specified.

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 steel procedures. When hardening, follow established shop practices for austenitizing temperature ranges and quench media appropriate for O1 steel. Always wear appropriate PPE when cutting, grinding, or heat treating tool steel. Inspect bar ends and edges for burrs before handling or fixturing.