Drill Rod Tool Steels 66721 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 66721 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who need a precision-ground, ready-to-machine blank. O1 tool steel is a general-purpose oil-hardening grade known for good wear resistance and ease of hardening in shop conditions. This piece measures 0.0625 inches thick by 1.5 inches wide by 18 inches long and carries tight dimensional tolerances throughout, making it suitable for fixture plates, blanking dies, punches, gauges, and small cutting tools. The stock ships in an annealed condition ready for machining and subsequent oil quench hardening.

This flat stock is used in machine shops, tool rooms, and maintenance departments for fabricating precision tooling components. Typical applications include die sections, forming tools, jigs, and fixture details where controlled heat treatment and dimensional accuracy are required. The 18-inch length provides a practical starting blank for most bench tooling and die-shop applications. Both job shops handling one-off tooling and production facilities maintaining spare blanks will find this size convenient.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable, low-distortion heat treatment
• Thickness of 0.0625 inches held to a tolerance of plus or minus 0.001 inches
• Width of 1.5 inches held to a tolerance of plus 0.005 inches, minus 0.000 inches
• Length of 18 inches with a plus 0.25-inch length tolerance
• Squareness held to 0.003 inches on edges and 0.004 inches per inch of thickness on ends
• Supplied in annealed condition for direct machining prior to hardening

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat stock suitable for general toolmaking, die making, and precision machining applications where this grade and size are specified.

Installation Notes

Machining and heat treatment of tool steel should be performed by qualified machinists or toolmakers familiar with O1 steel procedures. Follow the material supplier's recommended annealing, hardening, and tempering temperatures for AISI O1 before placing the finished tool in service. Secure the workpiece properly in a milling vise or surface grinder magnetic chuck before cutting operations. Allow the steel to reach a uniform temperature during heat treatment to minimize distortion and cracking.