Starrett 54233 O1 Tool Steel Flat Stock 1-1/4x2-1/2x18in

Product Description

The STARRETT 54233 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured to AISI Type O1 material specification, this flat stock measures 1-1/4 inches thick, 2-1/2 inches wide, and 18 inches long. Thickness and squareness tolerances are held to plus or minus 0.001 inches, with an edge squareness of 0.003 per inch, making it well-suited for applications that require close dimensional control before heat treatment. The bar ships in annealed condition and is ready for machining prior to oil-hardening. Machinists, tool and die makers, and skilled tradespeople working in maintenance or fabrication shops are the primary installers of this material.

O1 tool steel flat stock in this size range is commonly used to produce punches, dies, cutting tools, gauges, jigs, and fixtures in both job shop and production environments. The 18-inch length provides a workable blank for a wide range of tooling applications without requiring further sawing in many cases. The 1-1/4-inch thickness suits heavier tooling cross-sections where rigidity after hardening is required. This bar is appropriate for both prototype and short-run production tooling where oil-hardening steel is specified by design or engineering requirements.

Key Features

• AISI Type O1 oil-hardening tool steel material specification
• Thickness tolerance of plus or minus 0.001 inches for close pre-machining fit
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.250 inches, minus 0 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Supplied in annealed condition, ready for machining and subsequent oil-hardening heat treatment

Compatibility

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

Installation Notes

Machining and heat treatment of tool steel flat stock should be performed by qualified machinists or tool and die makers familiar with O1 steel handling procedures. All rough machining should be completed before oil-hardening heat treatment, as the material will be significantly harder afterward. Appropriate personal protective equipment and machine guarding must be in place during all cutting, grinding, and sawing operations. Consult the applicable material data sheet and shop safety standards before beginning heat treatment.