Starrett 54500 O1 Tool Steel Flat Stock 1x1x36 in

Product Description

The STARRETT 54500 is an O1 oil-hardening tool steel flat stock bar measuring 1 inch thick, 1 inch wide, and 36 inches long. Manufactured to AISI Type O1 material specification, this flat stock is intended for toolmakers, machinists, and die makers who need a reliable, machinable steel that hardens predictably in an oil quench. Thickness and square tolerances are held to plus or minus 0.001 inches, making it suitable for precision tooling applications where dimensional consistency before hardening matters. Width tolerance runs from 0.000 to 0.005 inches under nominal. Length tolerance is plus 0.015 inches from nominal.

O1 tool steel flat stock in this size is commonly used in machine shops and tool-and-die operations for fabricating punches, dies, gauges, jigs, and small fixtures. The 36-inch length allows multiple blanks to be cut from a single bar. This stock is typically worked in the annealed condition, then oil-quenched and tempered to the desired hardness for the final application. It is appropriate for both production shop environments and individual toolmakers working on precision components.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent, controlled hardening in an oil quench
• Tight thickness tolerance of plus or minus 0.001 inches for precision blanking and layout work
• Width tolerance held to 0.000 to 0.005 inches under nominal
• Squareness held to edge: all 0.003 inches per inch across the bar
• 36-inch bar length allows multiple blanks from a single piece
• Supplied in annealed condition for ease of machining prior to heat treatment

Compatibility

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

Installation Notes

Machining and grinding of O1 tool steel should be performed in the annealed state before heat treatment. Oil quenching and tempering should be carried out by a qualified heat treater or machinist with appropriate equipment and safety controls. Proper eye protection, heat-resistant gloves, and ventilation are required during any heat treatment process. Follow applicable shop safety standards and equipment manufacturer guidelines when handling hot stock or quench media.