Starrett 54192 O1 Tool Steel Flat Stock 0.75x2.5x18 in

Product Description

The STARRETT 54192 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, jig and fixture fabrication, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 0.75 inches thick, 2.5 inches wide, and 18 inches long, weighing 9.56 pounds. The O1 grade offers good machinability in the annealed state and responds well to oil-quench hardening, making it a reliable choice for cutting tools, punches, and wear components that require a hard, stable working surface after heat treatment.

This flat stock is suited for machine shops, tool and die operations, and maintenance departments that need a precision-ground bar ready for layout and machining. The 18-inch length provides workable stock for a variety of tool blanks and small die components. Machinists and tool makers working in both production and job-shop environments use O1 flat stock as a starting point for custom tooling that will be hardened and finished to final dimensions.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable, controlled heat treatment response
• Thickness of 0.75 inches with a tolerance of plus or minus 0.001 inches for consistent stock removal planning
• Width of 2.5 inches with a tolerance of 0.0000 to minus 0.005 inches
• Length of 18 inches with a plus 0.250 inch length tolerance
• Edge squareness held to 0.003 inches per inch on all edges
• Precision flat stock format minimizes setup time for milling, grinding, and EDM operations

Compatibility

Designed as a general-purpose O1 oil-hardening tool steel flat bar suitable for toolmaking, die making, and precision machining applications requiring AISI Type O1 material.

Installation Notes

O1 tool steel flat stock is worked by qualified machinists and tool makers using conventional milling, grinding, and drilling equipment. Before hardening, ensure the part is machined to near-final dimensions, as distortion and slight dimensional change occur during oil quench. Heat treatment should be performed by personnel familiar with AISI O1 hardening and tempering procedures; improper quenching can cause cracking. Allow stock to reach room temperature before scribing layout lines or beginning machining.