Starrett 54444 O1 Tool Steel Flat Stock 0.5x2.5x36 in

Product Description

The STARRETT 54444 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 0.5 inches thick, 2.5 inches wide, and 36 inches long, weighing 12.75 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for applications where dimensional consistency is critical before and after heat treatment. O1 tool steel is known for its good machinability in the annealed state and its ability to achieve high hardness through oil quenching.

This flat stock is used in the fabrication of punches, dies, jigs, fixtures, and cutting tools in job shops, tool rooms, and maintenance departments. It arrives in the annealed condition, ready for machining and grinding to final shape prior to heat treatment. Machinists, tool and die makers, and industrial maintenance technicians commonly work with this material when building or rebuilding precision tooling components.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent hardenability
• Thickness tolerance of plus or minus 0.001 inches for close-tolerance stock
• 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
• Annealed condition allows for machining and grinding before hardening

Compatibility

Designed as a standard O1 oil-hardening tool steel flat bar suitable for general toolroom use wherever AISI Type O1 material is specified.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists or tool and die makers using appropriate cutting fluids and personal protective equipment. Heat treatment, including oil quenching, must follow established metallurgical procedures and applicable shop safety protocols. Consult material safety data and applicable OSHA standards before any heat-treating operation.