Starrett 54122 O1 Tool Steel Flat Stock 3/8x1-3/4x18 in

Product Description

The STARRETT 54122 is an O1 oil-hardening tool steel flat stock bar used in tool and die work, fixture building, punch and stamp fabrication, and general machine shop applications. Conforming to AISI Type O1 specifications, this flat stock measures 3/8 inches thick, 1-3/4 inches wide, and 18 inches long, weighing 3.35 pounds. Thickness tolerance is held to plus or minus 0.001 inches, and squareness is controlled to 0.003 inches per inch on all edges. These tight tolerances make it suitable for precision tooling applications where dimensional consistency before and after heat treatment is critical. Machinists, tool and die makers, and metalworking shops are the primary users of this material.

O1 tool steel flat stock is commonly used in the fabrication of cutting tools, punches, dies, gauges, and fixtures. Its oil-hardening characteristic makes it well-suited for applications requiring moderate wear resistance and good machinability in the annealed state. This 18-inch length is a practical size for shop use, allowing for layout, sawing, and finish machining prior to hardening. It is appropriate for both job shop and production toolroom environments where consistent raw material quality is required.

Key Features

• AISI Type O1 oil-hardening tool steel for reliable heat treatment response
• Thickness: 3/8 inches with plus or minus 0.001 inch tolerance
• Width: 1-3/4 inches with tolerance of minus 0.000 to minus 0.005 inches
• Length: 18 inches with plus 0.250 inch length tolerance
• Squareness held to 0.003 inches per inch on all edges
• Good machinability in annealed state before oil-hardening heat treatment

Compatibility

Designed as a standard AISI Type O1 oil-hardening tool steel flat stock suitable for general toolroom and machine shop use where O1 grade material in this cross-section is specified.

Installation Notes

Cutting, grinding, and machining should be performed in the annealed state prior to heat treatment. Heat treatment of O1 tool steel should be performed by a qualified tool and die maker or heat treater following established metallurgical procedures for oil-quench hardening steels. Appropriate personal protective equipment is required during sawing, grinding, and heat treatment operations. Follow applicable shop safety standards for handling and storing tool steel stock.