Starrett 54302 O1 Tool Steel Flat Stock 1/8x1-1/4x36 in

Product Description

The STARRETT 54302 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, jig fabrication, and precision machining applications. It measures 1/8 inch thick, 1-1/4 inches wide, and 36 inches long, and is manufactured to AISI Type O1 material specification. Thickness tolerance is held to +/- 0.001 inches, making it suitable for applications where close dimensional control is required before heat treating. At 1.91 pounds per piece, it is a manageable length for bench and shop use. Machinists, tool and die makers, and skilled tradespeople work with this stock to produce punches, dies, gauges, and similar hardened tooling components.

O1 tool steel flat stock is a standard choice in job shops, maintenance departments, and tool rooms handling light- to medium-duty tooling work. This bar is supplied in the annealed condition, allowing it to be machined or ground to final dimensions before oil quench hardening. It is appropriate for producing small to mid-size flat tooling components in both one-off and short-run production scenarios. The 36-inch length allows multiple blanks to be cut from a single piece, reducing material waste on typical tooling projects.

Key Features

• AISI Type O1 oil-hardening tool steel for reliable heat-treat response
• Tight thickness tolerance of +/- 0.001 inches suits precision tooling work
• Width tolerance of 0.0000 to 0.0050 inches for consistent stock sizing
• Length tolerance of +0.015 inches ensures no undersize pieces
• Edge squareness held to 0.003 inches per inch on all edges
• Supplied in annealed condition, ready for machining and grinding prior to hardening

Compatibility

Designed as a standard O1 oil-hardening tool steel flat bar for use in tool and die making, fixture fabrication, and general precision tooling applications requiring an oil-quench-hardening grade of tool steel.

Installation Notes

Cutting and machining of tool steel flat stock should be performed with appropriate metalworking equipment and tooling rated for hardened or semi-hard steel grades. Work in the annealed condition prior to heat treatment to maintain dimensional accuracy. Oil quench hardening should be performed by personnel familiar with heat-treating procedures for O1 tool steel to avoid warping or cracking. Follow applicable shop safety practices when cutting, grinding, or handling raw tool steel stock.