Drill Rod Tool Steels 66735 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 66735 is an O1 oil-hardening tool steel flat bar cut to 0.125 inches thick, 1 inch wide, and 18 inches long. Manufactured to AISI Type O1 specification, this flat stock is ground to tight dimensional tolerances, making it suitable for toolmaking, die work, punches, and precision fixtures. The thickness tolerance holds at plus or minus 0.001 inches, and the width tolerance is held to plus 0.005 inches with no undercut. Machinists, tool and die makers, and metalworking shops use this material where dimensional accuracy and hardenability are required before final heat treatment.

O1 tool steel flat stock in this size range is commonly used in job shops and production toolrooms for fabricating blanks, stripper plates, small die components, and guiding elements. The 18-inch length provides workable stock for multiple short workpiece cuts or a single longer tool blank. Its oil-hardening characteristic allows controlled hardening with reduced distortion compared to water-hardening grades, making it a practical choice for precision tool fabrication in both light manufacturing and prototype environments.

Key Features

• AISI Type O1 oil-hardening tool steel for controlled, low-distortion hardening
• Thickness tolerance of plus or minus 0.001 inches for precise fit in tooling applications
• Width tolerance of plus 0.005 inches with zero undercut
• Length tolerance of plus 0.25 inches
• Squareness: edge 0.003 inches, end 0.004 inches per inch of thickness
• Ready-to-machine flat stock requiring no additional surface prep before layout and cutting

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat bar suitable for general toolroom and die-shop applications where this material specification and size are required.

Installation Notes

Machining and heat treatment of tool steel should be performed by qualified machinists or tool and die makers familiar with O1 steel handling. Always anneal before machining if material has been previously hardened, and quench in oil per standard O1 heat treatment procedure. Secure workpiece properly before cutting or grinding to prevent movement. Follow applicable shop safety standards when handling freshly hardened or ground steel stock.