Drill Rod Tool Steels 66781 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 66781 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who require a precision-ground, ready-to-use workpiece. Conforming to AISI Type O1 specifications, this flat stock measures 0.5 inches thick, 3 inches wide, and 18 inches long with a thickness tolerance of plus or minus 0.001 inches and a width tolerance of plus 0.005 inches, minus 0.000 inches. The close dimensional tolerances and known oil-hardening response make it a reliable starting point for jigs, fixtures, punches, and custom tooling applications.

O1 tool steel flat stock is widely used in job shops and manufacturing environments where parts are machined to near-final shape in the annealed condition and then oil-quenched to achieve working hardness. This bar is suited for fabricating blanks, gauges, cutting tools, and wear components in both light industrial and heavy production settings. Machinists working in tool-and-die, mold-making, and general metalworking trades are the primary users of this material form.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat-treat response
• Thickness tolerance of plus or minus 0.001 inches for precise stock removal planning
• Width tolerance of plus 0.005 inches, minus 0.000 inches
• Length tolerance of plus 0.25 inches, minus 0.000 inches
• Squareness: edge 0.003 inches, end 0.004 inches per inch of thickness
• Single-piece packaging suitable for low-quantity toolroom procurement

Compatibility

Designed as a standard AISI Type O1 oil-hardening tool steel flat bar suitable for general toolmaking, die-making, and fixture fabrication where O1 material specification is required.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists using appropriate coolant to prevent heat buildup and microstructural changes. Heat treatment, including oil quenching, should follow established metallurgical procedures and be performed by personnel familiar with tool steel hardening processes. Appropriate personal protective equipment including eye protection and heat-resistant gloves is required during all machining and heat-treat operations. Verify final dimensions after heat treatment, as minor distortion is common with oil-hardening grades.