Starrett 54084 O1 Tool Steel Flat Stock 0.25x6x18 in

Product Description

The STARRETT 54084 is an O1 oil-hardening tool steel flat stock bar designed for toolmakers, machinists, and die makers who require tight-tolerance ground stock for fabricating punches, dies, gauges, and cutting tools. Manufactured to AISI Type O1 specification, this flat bar measures 0.25 inches thick, 6 inches wide, and 18 inches long, with a weight of 7.65 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for precision tool and fixture applications where dimensional consistency is critical before and after heat treatment.

O1 tool steel flat stock is a standard material in job shops, tool rooms, and maintenance departments. It is used to produce custom tooling, jig components, wear plates, and blanks that will be finish-machined and then oil-quenched to hardness. This 6-inch-wide by 18-inch-long bar provides enough stock for medium to large tool blanks without requiring a full-length mill order. It is handled primarily by toolmakers, machinists, and precision fabricators working on manual or CNC mill setups.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent response to heat treatment
• Thickness held to plus or minus 0.001 inches for precision ground surfaces
• Width tolerance of 0.000 to minus 0.005 inches ensures stock fits standard setups
• Length tolerance of plus 0.250 inches, minus 0 inches provides usable full-length stock
• Edge squareness held to 0.003 inches per inch across all edges
• Single-piece package with no minimum order beyond one unit

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat bar suitable for general tool room and die shop applications requiring ground flat stock in 0.25-inch thickness.

Installation Notes

Cutting and machining of tool steel flat stock should be performed with appropriate metalworking equipment by qualified machinists or toolmakers. Carbide or high-speed-steel tooling is typically used for milling and grinding operations. Heat treatment, including oil quenching, should follow AISI O1 recommended procedures and be performed by qualified personnel with proper furnace and quench equipment. Always allow the material to normalize and reach ambient temperature before precision grinding to final dimension.