Starrett 54529 O1 Tool Steel Flat Stock 1.5x1.5x36 in

Product Description

The STARRETT 54529 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 1-1/2 inches thick by 1-1/2 inches wide by 36 inches long and weighs approximately 22.95 pounds. Thickness tolerance is held to plus or minus 0.001 inches, and edge squareness is maintained at 0.003 inches per inch — tolerances that matter when the stock feeds directly into jig, fixture, or tool component fabrication. Machinists and toolmakers order this bar for stock removal, profile grinding, and hardening operations.

O1 tool steel is a general-purpose oil-hardening grade widely used in industrial and tool-and-die shops. This flat stock is suited for producing punches, dies, gauges, taps, reamers, and similar cutting or forming tools. The 36-inch length provides substantial stock for multiple parts or longer tooling components. Its consistent cross-section and tight dimensional tolerances reduce setup time and rework at the machine. This bar is sold individually and is appropriate for both production shops and low-volume tool room environments.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent heat-treat response
• Thickness tolerance of plus or minus 0.001 inches for precision stock
• 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
• Full 36-inch length at 1-1/2 x 1-1/2 inches cross-section — approximately 22.95 pounds per bar

Compatibility

Designed as a standard AISI O1 oil-hardening flat stock suitable for general tool-and-die, jig, fixture, and precision machining fabrication applications where O1 grade tool steel is specified.

Installation Notes

Cutting and machining of tool steel flat stock should be performed by qualified machinists using appropriate tooling rated for hard or semi-hard steel. Wear appropriate PPE during sawing, grinding, or milling operations. Heat treatment — including oil quenching — should follow established metallurgical procedures for AISI O1 steel and be performed by qualified personnel. Handle with care due to weight; the bar weighs approximately 22.95 pounds.