Drill Rod Tool Steels 57751 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 57751 is an O1 oil-hardening tool steel flat bar cut to 5/16 inches thick, 5/16 inches wide, and 18 inches long. O1 is an oil-quench tool steel known for good wear resistance, dimensional stability during hardening, and machinability in the annealed state. This flat stock ships in the annealed condition, ready for machining, grinding, and heat treating to final hardness. Machinists, tool-and-die makers, and metalworking professionals use this material to fabricate punches, dies, gauges, jigs, and cutting tools where controlled tolerances and predictable hardening response are required.

This flat stock is suited to small-shop and production tool rooms working in light to medium tooling applications. The 18-inch length provides a practical starting cut for fabricating short tooling components without significant material waste. The square cross-section profile simplifies fixturing and grinding to final dimensions. At 0.51 pounds per piece, this bar is easy to handle at the bench vise or surface grinder without additional support equipment.

Key Features

• AISI Type O1 oil-hardening tool steel - consistent, predictable heat-treat response
• Annealed condition - machines and grinds cleanly before hardening
• Tight thickness tolerance of plus or minus 0.001 inches for close-tolerance tooling work
• Width tolerance of plus 0.005 inches, minus 0.000 inches - always at or above nominal
• Length tolerance of plus 0.25 inches - no undersize cuts
• Square tolerance of plus or minus 0.003 inches for accurate cross-section geometry

Compatibility

Designed as a standard AISI O1 oil-hardening flat stock suitable for general tool-and-die, jig, fixture, and gauge fabrication applications requiring an oil-quench tool steel in flat bar form.

Installation Notes

Machining and heat treatment of O1 tool steel should be performed by qualified machinists or tool-and-die professionals familiar with oil-quench hardening procedures. Always follow established shop safety practices when grinding or heat treating tool steel, including appropriate PPE and ventilation. Consult the material specification sheet for recommended preheat, austenitizing, and quench parameters before heat treating. Do not apply heat treatment procedures without verified process data for AISI O1 steel.