Starrett 53980 O1 Tool Steel Flat Stock 3/32x1x18 in

Product Description

The STARRETT 53980 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who need a reliable, machinable blank ready for heat treatment. Manufactured to AISI Type O1 specification, this bar measures 3/32 inches thick, 1 inch wide, and 18 inches long and weighs approximately 0.48 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for close-tolerance tool and die applications where dimensional consistency before hardening is critical. The stock ships in its annealed state, allowing conventional machining, grinding, and filing prior to the oil-quench hardening process.

O1 tool steel flat stock is used across a broad range of precision fabrication tasks including punch and die blanks, gauges, fixtures, small cutting tools, and wear parts. The 18-inch length provides enough material for multiple short blanks or a single longer workpiece. This bar is suited for job shops, tool rooms, and maintenance departments that regularly work with oil-hardening grades. It is equally appropriate for pattern makers and prototype fabricators who need a known-grade steel with predictable hardening response.

Key Features

• AISI Type O1 oil-hardening tool steel specification for consistent heat-treat response
• Thickness tolerance of plus or minus 0.001 inches for close-tolerance starting stock
• Width tolerance of 0.0000 to 0.0050 inches under nominal
• Length tolerance of plus 0.250 inches, minus 0 inches
• Edge squareness held to 0.003 inches per inch across all edges
• Annealed condition allows machining, grinding, and filing before hardening

Compatibility

Designed as a general-purpose O1 oil-hardening tool steel flat bar suitable for tool room, die shop, and precision fabrication applications requiring AISI Type O1 material.

Installation Notes

Cutting, grinding, and machining should be completed before the oil-quench hardening cycle. A licensed machinist or experienced toolmaker should perform heat treatment in accordance with the material supplier recommendations for AISI O1 steel. Always use appropriate personal protective equipment when cutting or grinding tool steel. Secure the workpiece properly before any cutting operation to prevent movement and ensure dimensional accuracy.