Starrett 54261 O1 Tool Steel Flat Stock 1/16 X 1-1/2 X 36 in

Product Description

The STARRETT 54261 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who need a precision-ground blank ready for layout, machining, and hardening. It measures 0.0625 inches thick, 1.5 inches wide, and 36 inches long. The material conforms to AISI Type O1 oil-hardening specification, a widely used cold-work tool steel known for its dimensional stability during heat treatment. Thickness tolerance is held to plus or minus 0.001 inches, making this bar suitable for applications where tight pre-hardened dimensions reduce downstream grinding time.

O1 flat stock at this size is commonly used in the fabrication of punches, dies, gauges, jigs, fixtures, and cutting tools in both job-shop and production toolroom environments. The 36-inch length allows the bar to be cut to multiple shorter blanks from a single piece, reducing material waste. Machinists working in tool and die, mold making, and precision instrument manufacturing will find this stock appropriate for close-tolerance work before or after heat treatment.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat-treat response and good dimensional stability
• Thickness tolerance of plus or minus 0.001 inches for precision pre-machined fitment
• Width tolerance of 0.000 to minus 0.005 inches held across the 1.5-inch face
• Length tolerance of plus 0.015 inches on the 36-inch bar
• Edge squareness held to 0.003 inches per inch across all edges
• Single 36-inch bar allows multiple cut-to-length blanks from one piece

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock blank suitable for general toolroom fabrication wherever AISI Type O1 material specification is required.

Installation Notes

O1 tool steel flat stock is machined and fitted by toolmakers and machinists using conventional milling, grinding, and sawing equipment. Heat treatment should be performed by a qualified heat treater following established AISI O1 austenitizing and oil-quench procedures. Always use appropriate cutting fluids when machining to maintain surface finish and dimensional accuracy. Wear appropriate PPE when cutting or grinding tool steel bar stock.