Starrett 54068 O1 Tool Steel Flat Stock 1/4x1/4x18 in

Product Description

The STARRETT 54068 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. Manufactured from AISI Type O1 tool steel, this flat stock measures 0.25 inches thick by 0.25 inches wide by 18 inches long and weighs 0.32 pounds. O1 tool steel is valued for its consistent response to oil-hardening heat treatment, good machinability in the annealed state, and ability to hold a sharp edge after hardening. Thickness tolerance is held to plus or minus 0.001 inches, making this stock suitable for applications where dimensional accuracy prior to grinding or final machining is critical. Machinists, toolmakers, and die makers are the primary users of this material.

This flat stock is suited for small tool blanks, punches, form tools, and custom die components in both job shop and production tool room environments. The 18-inch length allows multiple pieces to be cut from a single bar. The tight squareness specification of 0.003 inches per inch on all edges reduces layout and setup time. This bar ships in an annealed condition, ready for machining and subsequent heat treatment.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat treat response
• Thickness: 0.25 inches with plus or minus 0.001 inch tolerance
• Width: 0.25 inches with tolerance of minus 0.000 to minus 0.005 inches
• Length: 18 inches with plus 0.250 inch length tolerance
• Edge squareness held to 0.003 inches per inch on all edges
• Annealed condition — machinable before hardening

Compatibility

Designed as a standard O1 tool steel flat stock bar for use in tool rooms, die shops, and precision machining operations requiring oil-hardening tool steel in a 0.25 inch by 0.25 inch cross-section.

Installation Notes

Cutting and machining of tool steel flat stock should be performed with tooling rated for hardened or semi-hard ferrous stock, depending on the material condition. Heat treatment of O1 steel should be performed by a qualified heat treater or toolmaker following established procedures for oil quenching. Always wear appropriate PPE when cutting, grinding, or heat treating tool steel. Dispose of cutting fluids and quench oils in accordance with local regulations.