Starrett 54153 O1 Tool Steel Flat Stock 0.5x2x18 in

Product Description

The STARRETT 54153 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured from AISI Type O1 tool steel, this flat stock measures 0.5 inches thick, 2 inches wide, and 18 inches long, with a weight of 5.1 pounds. Thickness tolerance is held to plus or minus 0.001 inches, and squareness along all edges is maintained at 0.003 inches per inch. These tight tolerances make this stock suitable for applications where dimensional accuracy is critical before and after heat treatment. Licensed machinists, toolmakers, and die makers work with this material in job shops and industrial maintenance settings.

O1 tool steel flat stock in this size range is commonly used to produce punches, dies, gauges, fixtures, and cutting tools. The 0.5-inch thickness and 2-inch width make it practical for medium-duty tooling blanks that will be machined, ground, and then oil-hardened in a shop heat-treat process. This bar ships at a single-piece minimum and is sized for direct use without further slitting or resizing in most standard toolmaking workflows.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent response to shop heat treatment
• Thickness held to plus or minus 0.001 inches for precision fitment and grinding stock calculations
• Width tolerance of 0.000 to minus 0.005 inches ensures the bar fits within nominal width specifications
• Length tolerance of plus 0.250 inches, minus 0 inches provides extra stock for facing operations
• Edge squareness of 0.003 inches per inch on all edges supports accurate layout and machining setups
• Single-piece minimum order quantity for low-volume tooling and replacement part fabrication

Compatibility

Designed as a standard AISI Type O1 oil-hardening tool steel flat stock suitable for general toolmaking, die making, and precision machining applications requiring oil-hardened tool steel in this nominal size.

Installation Notes

This material is worked by qualified machinists and toolmakers using conventional milling, grinding, and sawing equipment. Follow proper shop safety procedures when cutting or grinding tool steel, including eye protection and appropriate ventilation. Oil hardening should be performed according to established heat-treat procedures for AISI O1 steel by qualified personnel. Allow the bar to reach room temperature before taking final measurements if it has been exposed to shop heat.