Starrett 54523 O1 Tool Steel Flat Stock 1-1/4x3x36 in

Product Description

The STARRETT 54523 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, jig and fixture fabrication, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 1-1/4 inches thick, 3 inches wide, and 36 inches long, with a weight of 38.25 pounds. Thickness and squareness tolerances are held to tight limits, making this stock suitable for applications where dimensional accuracy matters before and after heat treatment. Tool and die makers, machinists, and metalworking shops are the primary users of this material.

O1 tool steel flat stock is a common choice for producing punches, dies, gauges, cutting tools, and precision fixtures in job shops and manufacturing environments. The oil-hardening characteristic of O1 provides good dimensional stability during the hardening process, which reduces distortion compared to water-hardening grades. This 36-inch length accommodates a range of toolroom projects without requiring initial resizing. The material arrives in the annealed condition, ready for machining and subsequent heat treatment.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat-treat response
• Thickness tolerance of +/- 0.001 inches for precise as-received dimensional control
• Width tolerance of 0.000 to -0.005 inches
• Length tolerance of +0.015 inches
• Squareness held to 0.003 inches per inch on all edges
• Full 36-inch bar length suits standard toolroom cutting schedules

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat bar suitable for general toolmaking, die making, and precision machining applications requiring an oil-quenched tool steel in flat stock form.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists using appropriate coolant and tooling rated for tool steel. Heat treatment, including hardening and tempering, should be carried out by personnel familiar with O1 oil-quenching procedures and applicable shop safety requirements. Wear appropriate PPE when cutting or grinding. Handle heavy bar stock with mechanical assistance where required, as this bar weighs 38.25 pounds.