Starrett 54282 O1 Tool Steel Flat Stock 3/32x1-1/4x36in

Product Description

The STARRETT 54282 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Produced to AISI Type O1 specification, this flat stock measures 3/32 inches thick, 1-1/4 inches wide, and 36 inches long, and weighs approximately 1.2 pounds. Thickness tolerance is held to plus or minus 0.001 inches, supporting close-tolerance work where dimensional consistency matters before and after hardening. Machinists, tool and die makers, and industrial maintenance technicians work with this material to fabricate punches, dies, gauges, and custom tooling components.

O1 tool steel flat stock is used in job shops, toolrooms, and maintenance departments for fabricating custom cutting tools, fixture components, and wear parts. The 36-inch bar length allows for multiple piece layouts from a single bar, reducing material waste in short-run tooling production. It is suited for both manual and CNC machining operations prior to oil hardening and tempering. This product ships as a single bar at a minimum order quantity of one piece.

Key Features

• AISI Type O1 oil-hardening tool steel construction for reliable through-hardening performance
• Thickness tolerance of plus or minus 0.001 inches for close-tolerance tooling applications
• Width tolerance of 0.000 to minus 0.005 inches for consistent fitment in machined slots and holders
• Length tolerance of plus 0.015 inches ensures full usable bar length
• Edge squareness held to 0.003 inches per inch across all edges
• 36-inch bar length accommodates multiple part layouts per piece

Compatibility

Designed as a standard O1 oil-hardening tool steel flat bar suitable for general toolroom, die making, and precision fabrication applications requiring AISI Type O1 material specification.

Installation Notes

Machining of O1 tool steel flat stock should be completed before the hardening cycle, as post-hardening grinding is typically required to restore final dimensions. Oil hardening and tempering operations should be performed by qualified personnel following established heat-treat procedures for AISI O1 tool steel. Always allow the workpiece to reach ambient temperature before measuring final dimensions after heat treatment. Proper personal protective equipment is required when cutting, grinding, or heat-treating tool steel stock.