Starrett 54364 O1 Tool Steel Flat Stock 1/4x1x36 in

Product Description

The STARRETT 54364 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, jig and fixture fabrication, and precision machining applications. Manufactured from AISI Type O1 tool steel, this flat stock measures 0.25 inches thick, 1 inch wide, and 36 inches long, with a weight of 2.55 pounds. O1 is a versatile cold-work tool steel known for its excellent machinability in the annealed state and its ability to achieve high hardness after oil quenching. Close-tolerance grinding on the flat faces delivers a thickness tolerance of plus or minus 0.001 inches, making this stock suitable for applications where dimensional accuracy is critical before or after hardening.

This flat stock is used by tool and die makers, machinists, and fabricators in job shops, production facilities, and maintenance departments. Typical applications include making punches, dies, gauges, cutting tools, arbors, and templates. The 36-inch bar length provides practical yield for multiple pieces when cut to length. The annealed condition of the stock allows for conventional machining, grinding, drilling, and tapping prior to heat treatment.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable hardening response and good wear resistance after quenching
• Thickness tolerance of plus or minus 0.001 inches for close-tolerance work
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.015 inches
• Squareness: edge all 0.003 inches per inch
• Annealed condition supports full machinability before heat treatment

Compatibility

Designed as a standard O1 oil-hardening tool steel flat bar suitable for general toolmaking and precision fabrication applications requiring AISI Type O1 material specification.

Installation Notes

Machining and grinding of O1 tool steel should be performed in the annealed condition prior to hardening. Heat treatment, including oil quenching, should be performed by a qualified tool room technician or heat treater following the material manufacturer's recommended temperature and quench parameters. Always use appropriate personal protective equipment when cutting, grinding, or heat treating tool steel. Secure the bar properly in a vise or fixture before machining to prevent movement and maintain dimensional accuracy.