Starrett 57229 O1 Tool Steel Flat Stock 1/8x3/8x18 in

Product Description

The STARRETT 57229 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who need a reliable, machinable blank for custom tooling, punches, dies, and gauges. Manufactured to AISI Type O1 specification, this flat stock measures 1/8 inch thick by 3/8 inch wide by 18 inches long and weighs 0.24 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for applications where dimensional consistency before hardening is critical. O1 tool steel is widely used in job shops and tool rooms for its good machinability in the annealed state and its ability to achieve high hardness after oil quenching.

This flat stock is appropriate for small tooling blanks, form tools, scribes, cutting blades, and similar components fabricated in both production and one-off toolroom environments. The 18-inch length provides a practical working blank that can be cut to size on a bandsaw or cold saw. Its compact cross-section makes it well suited for slender punch blanks, small die components, and precision layout or measuring tools. This material is typically worked by machinists and tool and die makers in both commercial and in-house tool rooms.

Key Features

• AISI Type O1 oil-hardening tool steel for good machinability and high post-quench hardness
• Tight thickness tolerance of plus or minus 0.001 inches for dimensional consistency
• Width tolerance of 0.000 to minus 0.005 inches ensures reliable fit in close-clearance applications
• Length tolerance of plus 0.250 inches provides extra stock for facing or squaring operations
• Squareness held to 0.003 inches per inch on all edges
• Sold individually as a single 18-inch bar with no minimum order beyond one piece

Compatibility

Designed as a standard AISI Type O1 oil-hardening tool steel flat stock suitable for general toolroom and die-making applications requiring a pre-cut blank in a 1/8 inch by 3/8 inch cross-section.

Installation Notes

Machining and grinding should be performed in the annealed state before hardening. Oil quenching and tempering should be carried out by qualified personnel following established heat-treatment procedures for AISI O1 tool steel. Wear appropriate PPE when cutting, grinding, or heat-treating tool steel. Consult applicable shop safety standards before performing any hardening operations.