Starrett 54074 O1 Tool Steel Flat Stock 1/4x1-1/2x18 in

Product Description

The STARRETT 54074 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, jig fabrication, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 0.25 inches thick, 1.5 inches wide, and 18 inches long, with a weight of 1.91 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for applications that require close dimensional control before and after heat treatment. Machinists, tool and die makers, and industrial maintenance professionals work with this material regularly.

O1 tool steel flat stock is commonly used in shops producing punches, dies, gauges, and cutting tools. This bar is supplied in the annealed condition, ready for machining and subsequent oil-quench hardening. The 18-inch length provides enough material for multiple smaller blanks or a single longer component. It suits both job-shop and maintenance-department applications where consistent material quality and dimensional accuracy are required.

Key Features

• AISI Type O1 oil-hardening tool steel construction for reliable heat-treat response
• Thickness of 0.25 inches held to plus or minus 0.001 inches tolerance
• Width of 1.5 inches with tolerance of minus 0.000 to minus 0.005 inches
• Length of 18 inches with plus 0.250 inches length tolerance
• Edge squareness held to 0.003 inches per inch on all edges
• Ready for machining in annealed condition prior to hardening

Compatibility

Designed as a standard O1 oil-hardening tool steel flat bar suitable for general toolmaking, die making, and precision machining applications requiring AISI Type O1 material specification.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists or tool and die makers using appropriate cutting tools and coolant. Follow shop safety procedures when cutting or grinding, including use of proper eye protection and ventilation. Heat treatment, including oil quenching and tempering, should be carried out according to established procedures for AISI O1 tool steel and applicable shop standards. Always allow material to reach ambient temperature before taking final measurements.