Starrett 54225 O1 Tool Steel Flat Stock 1-1/8x1-1/2x18in

Product Description

The STARRETT 54225 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured to AISI Type O1 material specification, this flat stock measures 1-1/8 inches thick, 1-1/2 inches wide, and 18 inches long. It weighs 6.46 pounds. Thickness tolerance is held to plus or minus 0.001 inches, and squareness on all edges is controlled to 0.003 inches per inch, making this stock suitable for close-tolerance tooling work. Machinists, tool and die makers, and fabricators use this material as a starting blank for punches, dies, gauges, and fixtures that require subsequent heat treatment.

O1 tool steel flat stock is a standard material in job shops, tool rooms, and maintenance departments. The 18-inch length provides enough bar stock for most tooling blanks without requiring resawing. The oil-hardening designation means this steel is hardened by quenching in oil rather than water, reducing distortion risk during heat treatment. This stock is supplied in the annealed condition, ready for machining prior to hardening. Width tolerance runs from 0.000 to minus 0.005 inches and length tolerance is plus 0.250 inches, zero minus.

Key Features

• AISI Type O1 oil-hardening tool steel — annealed condition, ready for machining
• Thickness tolerance: plus or minus 0.001 inches for close-tolerance blanks
• Width tolerance: 0.000 to minus 0.005 inches
• Length tolerance: plus 0.250 inches, zero minus
• Edge squareness held to 0.003 inches per inch on all edges
• Single-piece packaging — no minimum bundle required

Compatibility

Designed as a general-purpose O1 oil-hardening tool steel flat stock blank for toolmaking, die making, gauging, and fixture fabrication applications requiring a machinable, hardenable steel in annealed flat bar form.

Installation Notes

Machining and heat treatment of tool steel should be performed by qualified machinists or tool and die makers familiar with O1 steel properties. Secure the workpiece properly before cutting or grinding operations. Heat treatment — including hardening and tempering — should follow established metallurgical procedures for AISI O1 tool steel and be performed in equipment capable of controlled temperatures. Do not attempt to harden this material without appropriate quench facilities and protective equipment.