Drill Rod Tool Steels 66766 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 66766 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, jig fabrication, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 5/16 inches thick, 1 inch wide, and 18 inches long, with a weight of 1.61 pounds. O1 tool steel is known for its good machinability in the annealed state and its ability to achieve high hardness after oil quench. Machinists and tool and die makers stock this material for blanks, punches, bushings, and similar components that require a stable, hardenable steel with predictable dimensional tolerances.

This flat stock is suited for job shop, toolroom, and maintenance machining environments. It is appropriate for fabricating small tools, gauges, blades, and fixture components where tight dimensional control is required prior to heat treatment. The 18-inch length provides practical stock for multiple short cuts or a single longer workpiece. The annealed condition allows conventional milling, drilling, and grinding before hardening.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent hardenability
• Thickness tolerance of plus or minus 0.001 inches for precise stock removal calculations
• Width tolerance of plus 0.005 inches, minus 0.000 inches
• Length tolerance of plus 0.25 inches
• Squareness tolerance of plus or minus 0.003 inches on edges; 0.004 inches per inch of thickness on ends
• Single-piece minimum order quantity for small job and toolroom use

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock suitable for toolroom, die shop, and general precision machining applications requiring AISI Type O1 material specification.

Installation Notes

Cutting, grinding, and machining should be performed in the annealed condition prior to heat treatment. Oil hardening and tempering should be carried out by a qualified heat treater or toolroom professional following established procedures for AISI O1 tool steel. Appropriate eye protection, machine guarding, and cutting fluid practices apply during all machining operations. Handle cut edges carefully as ground or sawed tool steel stock can have sharp burrs.