Starrett 54033 O1 Tool Steel Flat Stock 5/32x1-3/4x18in

Product Description

The STARRETT 54033 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured to AISI Type O1 specification, this flat bar measures 5/32 inches thick, 1-3/4 inches wide, and 18 inches long, and weighs 1.4 pounds. Thickness tolerance is held to plus or minus 0.001 inches, and squareness along all edges is controlled to 0.003 inches per inch. These tight tolerances make this stock suitable for applications where dimensional consistency before heat treatment is critical. Licensed machinists, toolmakers, and die shops are the primary users of this material.

O1 tool steel flat stock is commonly used in the fabrication of cutting tools, punches, dies, gauges, and fixtures in both job-shop and production environments. It is supplied in the annealed condition, ready for machining to final dimensions before oil-hardening heat treatment. The 18-inch length and 1-3/4-inch width make it a practical starting size for a broad range of small-to-medium tooling components. This stock is appropriate for both general tool room use and prototype work where close tolerances are required prior to hardening.

Key Features

• AISI Type O1 oil-hardening tool steel, supplied in annealed condition for machinability
• Thickness of 5/32 inches held to plus or minus 0.001 inches tolerance
• Width of 1-3/4 inches with tolerance of 0.0000 to minus 0.005 inches
• Length of 18 inches with a length tolerance of plus 0.250 inches, minus 0
• Squareness: all edges held to 0.003 inches per inch
• Single-piece packaging with a minimum order quantity of one

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat bar suitable for general toolmaking, die making, and precision fixture fabrication applications where pre-hardened or anneal-and-harden stock is required.

Installation Notes

This material is typically machined, ground, or cut to final dimensions by skilled machinists or toolmakers before heat treatment. Oil-hardening of O1 tool steel should be performed by a qualified heat treater following established metallurgical procedures and applicable shop safety protocols. Use appropriate personal protective equipment when cutting or grinding tool steel. Consult material data sheets for specific heat treatment temperature ranges and quench media requirements before processing.