Starrett 57234 O1 Tool Steel Flat Stock 1/2x1-3/4x18 in

Product Description

The STARRETT 57234 is an O1 oil-hardening tool steel flat stock bar measuring 0.5 inches thick, 1.75 inches wide, and 18 inches long. Manufactured to AISI Type O1 specification, this flat stock is produced from tool steel known for its excellent edge retention, dimensional stability after heat treatment, and machinability in the annealed state. Thickness tolerance is held to plus or minus 0.001 inches, and squareness is controlled to 0.003 inches per inch on all edges. Weighing 4.47 pounds per piece, this stock is suited for toolmakers, machinists, and die makers who need a reliable, close-tolerance starting blank for tool and die work, punches, gauges, and similar applications.

O1 tool steel flat stock in this size range is commonly used in job shops, tool rooms, and maintenance departments for fabricating custom cutting tools, jigs, fixtures, and wear components. The 18-inch length provides a practical working blank for most bench and machine shop operations. This stock is supplied in the annealed condition, ready for machining before hardening. It is appropriate for low-to-medium production tooling where oil-quench heat treatment is preferred over air or water hardening methods.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat-treat response
• Thickness tolerance of plus or minus 0.001 inches for close-tolerance blanks
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.250 inches, minus 0 inches
• Squareness held to 0.003 inches per inch on all edges
• Supplied in annealed condition, ready for machining

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock blank suitable for general tool room, die making, and machining applications where AISI O1 material specification is required.

Installation Notes

Machining and heat treatment of tool steel should be performed by qualified machinists or toolmakers familiar with O1 oil-hardening procedures. Wear appropriate PPE when cutting, grinding, or heat treating. Follow established shop safety practices and applicable OSHA guidelines when operating machine tools or heat-treat equipment. Allow the workpiece to reach ambient temperature before final measurement to ensure dimensional accuracy.