Drill Rod Tool Steels 66722 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 66722 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, jigs, fixtures, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 1/16 inch thick, 2 inches wide, and 18 inches long, with a thickness tolerance of plus or minus 0.001 inches. The tight dimensional tolerances make it suitable for applications where consistent stock size is critical before hardening. Machinists, tool-and-die makers, and metalworking professionals install and process this material in shop environments. It ships in a single piece per package and weighs 0.64 pounds.

O1 tool steel is a general-purpose oil-hardening grade widely used for cutting tools, punches, dies, gauges, and machine parts that require good wear resistance and edge retention after heat treatment. This flat stock format is suited for both manual and CNC machining operations prior to hardening. It is appropriate for low-to-medium production tooling in job shops, tool rooms, and manufacturing facilities. The 18-inch length provides useful working stock for a range of tool geometries without requiring initial cutdown from longer bar lengths.

Key Features

• AISI Type O1 oil-hardening tool steel - general-purpose grade with good machinability before hardening
• Thickness tolerance of plus or minus 0.001 inches for consistent pre-grind stock allowance
• Width tolerance of plus 0.005 inches, minus 0.000 inches
• Length tolerance of plus 0.25 inches, minus 0.000 inches
• Squareness tolerance: edge 0.003 inches, end 0.004 inches per inch of thickness
• Ready-to-machine flat bar format - no initial milling required on thickness faces

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat stock suitable for general toolmaking, die-making, and precision machining applications where O1 grade specification is required.

Installation Notes

O1 tool steel flat stock is processed by machinists and tool-and-die makers using standard milling, grinding, and sawing equipment. Material should be rough-machined to near-final dimensions before oil-hardening heat treatment, as post-hardening machining requires grinding. Heat treatment should follow AISI O1 specifications for austenitizing temperature and quenching in oil - always consult a qualified heat-treat procedure, as improper quenching can cause distortion or cracking. Handle with care to avoid nicks or surface damage that could propagate during hardening.