Starrett 54484 O1 Tool Steel Flat Stock 3/4x4x36 in

Product Description

The STARRETT 54484 is an O1 oil-hardening tool steel flat stock bar sized at 0.75 inches thick, 4 inches wide, and 36 inches long. Manufactured to AISI Type O1 specifications, this flat stock is used by tool and die makers, machinists, and metalworking professionals who need a reliable, machinable steel blank that hardens predictably in an oil quench. The tight thickness tolerance of plus or minus 0.001 inches and edge squareness of 0.003 per inch make it well suited for precision tooling applications where dimensional consistency is critical before and after heat treatment. At 30.6 pounds per bar, this is a substantial piece intended for production or shop-use scenarios.

O1 tool steel flat stock of this size is commonly used in fabrication shops, tool rooms, and manufacturing environments for making punches, dies, cutting tools, gauges, and jigs. Its oil-hardening characteristic gives the finished part good wear resistance and toughness when properly heat treated. Machinists typically rough-machine the stock in the annealed state, then send it out for or perform oil-quench hardening and tempering before final grinding to finished dimension. This bar is appropriate for both one-off tooling jobs and short-run production of wear components.

Key Features

• AISI Type O1 oil-hardening tool steel — predictable hardening response with minimal distortion during quench
• Thickness tolerance of plus or minus 0.001 inches for dimensional consistency in precision tooling layouts
• Width tolerance of 0.000 to minus 0.005 inches ensures bar is never oversized in width
• Length tolerance of plus 0.015 inches provides a clean cut end with stock to face
• Edge squareness held to 0.003 inches per inch on all edges
• Full 36-inch length supports longer tooling blanks, die sections, and multiple cuts from a single bar

Compatibility

Designed as a standard AISI Type O1 oil-hardening tool steel flat stock suitable for general tooling, die making, and precision machining applications requiring a ground or precision-tolerance steel blank in the 0.75 inch by 4 inch cross-section.

Installation Notes

This material is worked by qualified machinists and tool and die makers using standard metalworking equipment. Always clamp securely and use appropriate cutting speeds and feeds for annealed tool steel. Heat treatment — including oil quench hardening and tempering — should be performed by a qualified heat treater following published procedures for AISI O1 tool steel. Handle with care given the 30.6-pound bar weight to avoid personal injury and edge damage during transport and staging.