Starrett 54442 O1 Tool Steel Flat Stock 0.5x1.5x36 in

Product Description

The STARRETT 54442 is an O1 oil-hardening tool steel flat stock bar used in tool and die work, jig making, punch fabrication, and general machinist applications. Manufactured to AISI Type O1 specification, this flat stock measures 0.5 inches thick, 1.5 inches wide, and 36 inches long, and weighs 7.65 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for applications where dimensional consistency is critical before heat treatment. Machinists and toolmakers rely on O1 stock for its oil-hardening characteristics, which produce minimal distortion during the hardening process compared to water-hardening grades.

This flat stock is used in toolroom and production environments for fabricating cutting tools, mold components, gauges, and fixtures. The 36-inch length provides usable bar stock for multiple blanks from a single piece. It is suited for both manual and CNC machining prior to hardening and finishing. Typical users include toolmakers, machinists, die makers, and maintenance shops requiring precision-ground or pre-machined stock in a manageable bar length.

Key Features

• AISI Type O1 oil-hardening tool steel for minimal distortion during heat treatment
• Thickness tolerance of plus or minus 0.001 inches for consistent pre-machined fitment
• 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 on all edges
• 36-inch bar length yields multiple blanks per piece

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat stock suitable for general toolroom fabrication, fixture making, and die work where O1 grade material is specified.

Installation Notes

O1 tool steel flat stock is machined by skilled toolmakers or machinists using standard metal-cutting equipment before heat treatment. Parts should be rough-machined with adequate stock allowance prior to hardening to accommodate any movement during the oil-quench process. Heat treatment, including austenitizing temperature and oil quench procedure, should follow AISI O1 specifications and be performed by qualified personnel. Handle bar stock with appropriate lifting and securing practices to prevent injury from sharp edges.