Starrett 57026 O1 Tool Steel Flat Stock 0.5x6x18 in

Product Description

The STARRETT 57026 is an O1 oil-hardening tool steel flat stock blank used in toolmaking, die making, jig and fixture fabrication, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 0.5 inches thick, 6 inches wide, and 18 inches long. Thickness and width tolerances run from +0.010 to +0.015 inches, and length tolerance is +0.250 inches. Edge squareness is held to 0.003 inches per inch, providing a reliable reference surface for layout and machining operations. This piece ships as a single unit and is suited for shops that need a ready-to-machine blank without additional sawing from larger bar stock.

O1 tool steel is a general-purpose oil-hardening grade used across a wide range of toolroom and production applications. This flat stock is commonly used by machinists, toolmakers, and die makers working in job shops, maintenance facilities, and production environments. Typical applications include punches, dies, gauges, bushings, and fixtures where good wear resistance after hardening is required. The flat ground finish and consistent tolerances reduce setup time and material prep before machining or heat treatment.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent heat treatment response
• Thickness and width tolerances of +0.010 to +0.015 inches for close-tolerance blanks
• Length tolerance of +0.250 inches allows for face-off material
• Edge squareness held to 0.003 inches per inch on all edges
• Ready-to-machine flat stock format reduces prep time in the toolroom
• Single-piece packaging with no minimum beyond one unit

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat stock suitable for general toolroom use where O1 grade material and flat ground stock are specified.

Installation Notes

Cutting and machining of tool steel flat stock should be performed by qualified machinists using appropriate cutting tools rated for tool steel. Follow established heat treatment procedures for AISI O1 when hardening and tempering. Handle edges with care, as ground surfaces can carry sharp burrs after sawing or grinding. Consult applicable shop safety standards and material safety data for tool steel when grinding or welding.