Drill Rod Tool Steels 66738 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 66738 is an O1 oil-hardening tool steel flat stock bar measuring 0.125 inches thick, 1.75 inches wide, and 18 inches long. Conforming to AISI Type O1 material specification, this flat stock is supplied in the annealed condition and is intended for applications requiring precise dimensional tolerances before heat treatment. Thickness tolerance is plus or minus 0.001 inches, width tolerance is plus 0.005 inches to zero, and length tolerance is plus 0.25 inches. The piece weighs approximately 1.13 pounds. Machinists, toolmakers, and die makers use this stock to fabricate punches, dies, gauges, jigs, and cutting tools where tight dimensional control is required prior to oil-quench hardening.

O1 tool steel flat stock is commonly used in tool-and-die shops, machine shops, and maintenance-repair environments. Typical applications include blanking and forming dies, precision fixtures, master gauges, lathe tools, and hand cutting tools. The 18-inch length and 1.75-inch width make this bar suitable for small-batch tooling work where stock is cut to individual component dimensions. This flat stock is appropriate for both one-off prototype tooling and short-run production tool fabrication.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable hardening response in oil quench
• Tight thickness tolerance of plus or minus 0.001 inches for precise pre-machined fits
• Width tolerance of plus 0.005 to zero inches supports consistent stock removal planning
• Edge squareness of 0.003 inches and end squareness of 0.004 inches per inch of thickness
• Supplied in annealed condition for ease of machining before hardening operations
• Single-piece minimum order quantity supports low-volume toolroom requirements

Compatibility

Designed as a standard O1 oil-hardening tool steel flat bar for use in general toolroom, die-making, and precision machining applications where AISI Type O1 material specification is required.

Installation Notes

Cutting and machining of tool steel flat stock should be performed by qualified machinists or toolmakers using appropriate metalworking equipment. Eye protection and proper machine guarding are required during all cutting, grinding, and milling operations. Heat treatment, including oil quenching and tempering, must follow established metallurgical procedures for AISI O1 tool steel and should be performed by qualified personnel or a commercial heat treater. Allow the stock to reach a uniform temperature before quenching to avoid distortion or cracking.