Drill Rod Tool Steels 57965 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 57965 is an O1 oil-hardening tool steel flat stock bar measuring 9/16 inches thick, 3/4 inches wide, and 36 inches long. Manufactured to AISI Type O1 specification, this flat stock is intended for toolmakers, machinists, and die makers who require a precision-ground, oil-hardening steel with tight dimensional tolerances. The thickness tolerance holds to plus or minus 0.001 inches, and the width tolerance is held to plus 0.005 inches and minus 0.000 inches, making it suitable for close-tolerance tooling applications where consistency before heat treat is critical.

O1 tool steel flat stock of this profile is commonly used in the fabrication of punches, dies, gauges, jigs, fixtures, and cutting tools in both job shop and production machine shop environments. The 36-inch length allows a machinist to cut multiple blanks from a single piece, reducing material waste. This flat stock is supplied in the annealed condition and is intended to be hardened by oil quenching after machining to final or near-final dimensions.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat-treat response
• Thickness tolerance of plus or minus 0.001 inches for precise pre-grind fitment
• Width tolerance of plus 0.005 inches, minus 0.000 inches
• Length tolerance of plus 0.5 inches, minus 0.000 inches
• Squareness held to 0.003 inches on edges and 0.004 inches per inch of thickness on ends
• Single-piece minimum order quantity suits small-run and prototype work

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat bar suitable for general toolmaking, die making, and precision machining applications requiring an oil-quench hardenable steel in flat stock form.

Installation Notes

O1 tool steel flat stock is machined using conventional toolroom equipment including mills, lathes, surface grinders, and EDM machines. Heat treatment to full hardness requires oil quenching and should be performed by a qualified heat treater following established AISI O1 time-temperature guidelines. Always allow the steel to reach uniform temperature before quenching to minimize distortion. Grinding after hardening is standard practice to achieve final dimensional and surface finish requirements.