Starrett 54472 O1 Tool Steel Flat Stock 5/8x6x36 in

Product Description

The STARRETT 54472 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, jig fabrication, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 5/8 inch thick, 6 inches wide, and 36 inches long, and weighs 38.26 pounds. Thickness tolerance is held to +/- 0.001 inches, making it suitable for applications requiring tight dimensional control before and after heat treatment. O1 tool steel is known for its machinability in the annealed state and its ability to achieve high hardness through oil-quench hardening. Machinists, toolmakers, and die makers work with this material regularly.

This flat stock is used in the fabrication of punches, dies, gauges, cutting tools, and fixtures in both job shop and production environments. The 36-inch length provides sufficient stock for most bench-scale toolmaking operations. Width tolerance runs from 0.000 to -0.005 inches, and length tolerance is +0.015 inches. The material arrives in the annealed condition, ready for machining prior to heat treatment. Edge squareness is held to 0.003 inches per inch across all edges, supporting accurate layout and setup work.

Key Features

• AISI Type O1 oil-hardening tool steel for high hardness after quench and temper
• Thickness tolerance of +/- 0.001 inches for tight dimensional control
• Edge squareness held to 0.003 inches per inch on all edges
• Annealed condition allows machining before heat treatment
• Full 36-inch length suitable for most toolmaking and die-making stock requirements
• Width tolerance 0.000 to -0.005 inches for consistent fit in precision applications

Compatibility

Designed as a general-purpose O1 tool steel flat bar suitable for toolmaking, die making, and precision fixture fabrication where oil-hardening tool steel stock is specified.

Installation Notes

Work with this material using standard metalworking equipment including mills, surface grinders, and bandsaws rated for tool steel. Heat treatment should be performed by a qualified heat treater following AISI O1 specifications for austenitizing temperature, oil quench, and temper cycle. Always allow the bar to reach ambient temperature before precision layout or finish grinding. Follow applicable shop safety standards when cutting, grinding, or handling hardened tool steel.