Starrett 54264 O1 Tool Steel Flat Stock 1/16x2.5x36 in

Product Description

The STARRETT 54264 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, fixture fabrication, and precision machining applications. It measures 1/16 inch thick, 2-1/2 inches wide, and 36 inches long, with a weight of 1.59 pounds. Manufactured to AISI Type O1 specifications, it holds a thickness tolerance of plus or minus 0.001 inches, making it suitable for applications where close dimensional control is required before hardening. Machinists, tool and die makers, and precision fabricators stock and cut this material for gauges, punches, dies, and similar tooling components.

O1 oil-hardening tool steel is a general-purpose tool steel commonly used in low- to medium-production tooling. This flat stock format is suited for bench or machine sawing, milling, drilling, and grinding prior to heat treatment. After machining to near-net shape, it is hardened in oil and tempered to the desired working hardness. Typical applications include knife blanks, stamps, scribers, lathe tools, and small die sections. This stock length of 36 inches allows multiple blanks to be cut from a single piece, reducing material waste in job-shop and maintenance environments.

Key Features

• AISI Type O1 oil-hardening tool steel for general toolmaking and die applications
• Thickness tolerance of plus or minus 0.001 inches for close dimensional control
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.015 inches
• Edge squareness held to 0.003 inches per inch across all edges
• 36-inch bar length allows multiple blanks from a single piece

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock suitable for general toolmaking, die making, and precision fabrication work requiring a pre-hardened or anneal-and-harden workflow.

Installation Notes

Cut to length using a metal-cutting bandsaw, cold saw, or abrasive cutoff wheel before machining. Machine in the annealed state, then harden by heating to the appropriate austenitizing range and quenching in oil, followed by an immediate temper. Allow the steel to cool to hand-warm before tempering to reduce the risk of cracking. Standard shop safety practices apply, including eye protection and secure workholding during all cutting and grinding operations.