Starrett 54193 O1 Tool Steel Flat Stock 3/4x3x18 in

Product Description

The STARRETT 54193 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 material specification, this flat stock measures 0.75 inches thick, 3 inches wide, and 18 inches long with tightly controlled tolerances throughout. Thickness tolerance holds to plus or minus 0.001 inches, making it suitable for applications where dimensional consistency is critical before and after hardening. Weighing approximately 11.48 pounds, this piece is sized for single-piece toolroom use and ships in a package quantity of one.

O1 tool steel flat stock of this size is commonly used by machinists, tool and die makers, and moldmakers working in job shops, maintenance departments, and production toolrooms. It is well suited for fabricating punches, dies, gauges, cutting tools, and other precision components that require oil-quench heat treatment to reach working hardness. The 18-inch length provides practical stock for a range of toolroom projects without requiring initial resizing on most standard mill tables.

Key Features

• AISI Type O1 oil-hardening tool steel — designed for oil-quench hardening to achieve working hardness
• Thickness tolerance of plus or minus 0.001 inches for consistent stock dimensioning
• Width tolerance of minus 0.000 to minus 0.005 inches for predictable fit in close-tolerance fixtures
• Length tolerance of plus 0.250 inches, minus 0 inches — full usable length guaranteed
• Edge squareness held to 0.003 inches per inch across all edges
• Single-piece packaging suitable for toolroom and maintenance shop purchasing

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock for general toolroom use. Suitable for any application requiring AISI Type O1 material in flat bar form at 0.75 inches thick by 3 inches wide by 18 inches long.

Installation Notes

Cutting, grinding, and machining should be performed by qualified machinists using appropriate toolroom equipment. Heat treatment to working hardness requires oil-quench hardening per standard O1 tool steel procedure and should be carried out by personnel familiar with tool steel heat treatment practices. Always allow the material to reach ambient temperature before performing final grinding or precision dimensioning. Wear appropriate PPE when cutting, grinding, or heat treating tool steel stock.