Drill Rod Tool Steels 54178 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 54178 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 specification, this flat stock measures 0.625 inches thick, 2.5 inches wide, and 18 inches long, and weighs 8.06 pounds. O1 tool steel is a general-purpose oil-hardening grade valued for its good dimensional stability during heat treatment, moderate toughness, and ease of machining in the annealed state. Machinists, tool-and-die makers, and metalworking shops work with this material to produce punches, dies, gauges, and cutting tools.

This flat stock is suited for job shops, toolrooms, and production environments where O1 grade is specified. The annealed condition allows for machining, grinding, and drilling before hardening. At 18 inches in length, the bar can be cut to yield multiple blanks for small tooling components. It is appropriate for both short-run prototype work and repeat production of precision tooling where tight dimensional tolerances are required prior to heat treat.

Key Features

• AISI Type O1 oil-hardening tool steel - general-purpose grade with good machinability in annealed state
• Thickness tolerance of plus or minus 0.001 inches for consistent stock removal planning
• Width tolerance of plus 0.005 inches, minus 0.000 inches
• Length tolerance of plus 0.25 inches
• Squareness: edge 0.003 inches, end 0.004 inches per inch of thickness
• Ready for machining, grinding, or sawing before oil-quench hardening

Compatibility

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

Installation Notes

Work with this material using standard metalworking equipment including band saws, mills, and surface grinders. Heat treatment to harden O1 steel should be performed by a qualified heat treater following established time and temperature practices for oil-quench tool steels. Always allow the bar to reach ambient temperature before precision grinding or lapping to final dimensions. Follow applicable shop safety practices for hot work and quench operations.