Drill Rod Tool Steels 811091 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 811091 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who require a precision-ground blank ready for heat treatment. Supplied to AISI Type O1 material specification, this flat stock measures 5/32 inches thick by 5/32 inches wide by 18 inches long and weighs approximately 0.13 pounds. The oil-hardening grade offers good dimensional stability during the hardening process, making it a common choice for punches, dies, gauges, and small cutting tools where consistent cross-section is critical.

This flat stock is suited for job-shop and tool-room environments handling light to medium tooling fabrication. The 18-inch length provides a practical working blank for single-piece or short-run tool production. The square cross-section profile simplifies layout and machining before hardening. It is appropriate for applications in precision metalworking, mold making, and fixture building where O1 tool steel properties are specified.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat-treat response
• Thickness tolerance of plus or minus 0.001 inches for close dimensional control
• Width tolerance of plus 0.005 inches to minus 0.000 inches
• Length tolerance of plus 0.250 inches
• Square tolerance of plus or minus 0.003 inches across thickness and width
• Squareness: edge 0.003 inches per inch of thickness, end 0.004 inches per inch of thickness

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock for general tool-room and die-making applications requiring AISI Type O1 material specification.

Installation Notes

Machining and heat treatment of tool steel should be performed by qualified machinists or toolmakers familiar with O1 oil-hardening procedures. Always follow established shop safety practices when cutting, grinding, or heat-treating tool steel. Quench media, temperature cycles, and tempering procedures should conform to the material manufacturer guidelines and applicable shop standards. Wear appropriate PPE including eye protection and heat-resistant gloves during any thermal processing operations.