Starrett 54222 O1 Tool Steel Flat Stock 1x8x18 in

Product Description

The STARRETT 54222 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. It measures 1 inch thick, 8 inches wide, and 18 inches long, and is manufactured from AISI Type O1 tool steel, a general-purpose oil-hardening grade known for its dimensional stability and good machinability in the annealed state. Thickness tolerance is held to plus or minus 0.001 inches, and squareness is maintained to 0.003 inches per inch along all edges. At 40.8 pounds, this is a substantial stock piece suited for heavy-duty tooling work. It is sourced and cut to consistent dimensional standards for direct use in tool and die shops.

This flat stock is used by toolmakers, machinists, and die makers working in job shops, production tool rooms, and maintenance-and-repair operations. It is appropriate for applications requiring a tough, wear-resistant steel that can be oil-hardened and tempered after rough machining. Common uses include punches, dies, gauges, jigs, fixtures, and cutting tools. The piece size makes it practical for larger tooling blanks or plates that would be cut down and finish-machined before hardening.

Key Features

• AISI Type O1 oil-hardening tool steel — machines well in the annealed state before heat treatment
• Tight thickness tolerance of plus or minus 0.001 inches for precise stock removal planning
• Width tolerance of 0.000 to minus 0.005 inches ensures stock is never oversize in width
• Length tolerance of plus 0.250 inches provides safe extra material for facing operations
• Squareness held to 0.003 inches per inch on all edges for accurate layout work
• Single-piece packaging at a substantial 40.8 pounds — suitable for large tooling blanks

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock blank for use in tool and die applications requiring AISI Type O1 material specification.

Installation Notes

This material is supplied in the annealed condition and should be rough-machined before heat treatment. Oil hardening and tempering operations should be performed by a qualified heat treater or tool room professional following established metallurgical procedures for AISI O1 tool steel. Secure workpieces properly during sawing and milling operations given the weight of the stock. Follow applicable shop safety practices for handling large steel bar stock.