Starrett 57034 O1 Tool Steel Flat Stock 5/8x1.5x18 in

Product Description

The STARRETT 57034 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, jig fabrication, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 5/8 inches thick, 1-1/2 inches wide, and 18 inches long. Thickness and width tolerances are held to +0.0100 to 0.0150 inches, and length tolerance is +0.2500 inches. Edge squareness is maintained at 0.003 inches per inch across all edges. At 4.78 pounds, this bar is sized for bench-scale toolroom work and is ready for machining prior to heat treatment.

O1 tool steel is a general-purpose oil-hardening grade well suited for punches, dies, gauges, bushings, and cutting tools. This flat stock is typically used by tool and die makers, machinists, and maintenance shops that require a readily machinable steel with good dimensional stability through the hardening process. The 18-inch length suits most short-run toolroom needs without requiring full-bar stock handling. This bar is supplied in the annealed condition, ready for machining and subsequent oil-quench heat treatment.

Key Features

• AISI Type O1 oil-hardening tool steel for reliable hardness response after oil quench
• Tight thickness and width tolerances of +0.0100 to +0.0150 inches for consistent stock removal calculations
• Edge squareness held to 0.003 inches per inch on all edges
• Length tolerance of +0.2500 inches allows for face-cut cleanup without undersize risk
• Supplied in annealed condition for ease of machining before hardening
• Single-bar packaging with no minimum order quantity above one piece

Compatibility

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

Installation Notes

Machining and heat treatment of tool steel should be performed by qualified machinists or tool and die makers familiar with O1 grade steel handling. Secure the workpiece properly in a vise or fixture before machining to prevent movement. Heat treatment, including austenitizing temperature, soak time, and oil quench procedure, must follow AISI O1 guidelines and should not be performed without proper equipment and safety controls. Allow the bar to reach room temperature before taking final dimensional measurements.