Starrett 57014 O1 Oil-hardening Flat Stock 1/2x1/2x18in

Product Description

The STARRETT 57014 is an O1 oil-hardening flat stock bar made from AISI Type O1 tool steel. It measures 0.5 inches thick, 0.5 inches wide, and 18 inches long, weighing 1.28 pounds. O1 tool steel offers reliable edge-holding ability and dimensional stability after heat treatment, making it a standard choice for toolmakers, machinists, and die makers who need consistent stock for punches, dies, gauges, and cutting tools. The thickness and width tolerances run +0.010 to +0.015 inches, the length tolerance is +0.250 inches, and the squareness is held to 0.003 inches per inch on all edges.

This flat stock is suited for machine shops, tool-and-die operations, and maintenance shops that require annealed O1 stock ready for layout, machining, and oil-quench hardening. It is commonly cut to length, milled, ground, and heat-treated on-site to produce custom tooling components. The 18-inch bar length provides a practical starting point for multiple parts from a single piece. Professional machinists and tool grinders working in both production and job-shop environments use this material regularly.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable hardening response in an oil quench
• Thickness: 0.5 inches with +0.010 to +0.015 inch tolerance
• Width: 0.5 inches with +0.010 to +0.015 inch tolerance
• Length: 18 inches with +0.250 inch tolerance
• Squareness held to 0.003 inches per inch on all edges for reliable layout and grinding setups
• Ships in annealed condition, ready for machining prior to heat treatment

Compatibility

Designed as a standard annealed O1 oil-hardening flat stock bar suitable for general toolmaking, die making, and gauge fabrication applications where AISI Type O1 tool steel is specified.

Installation Notes

Machining and heat treatment of O1 tool steel should be performed by qualified machinists or tool-and-die makers familiar with proper hardening and tempering procedures. Always secure the workpiece with appropriate fixturing before machining. Follow established heat-treatment practices for O1 tool steel, including proper preheat, austenitizing temperature, and immediate oil quenching to avoid cracking. Wear appropriate PPE when handling hot tooling or performing grinding operations.