Starrett 54522 O1 Tool Steel Flat Stock 1-1/4x2-1/2x36 in

Product Description

The STARRETT 54522 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who need a reliable, pre-sized blank ready for further machining and heat treatment. Manufactured to AISI Type O1 specifications, this flat stock measures 1-1/4 inches thick, 2-1/2 inches wide, and 36 inches long, weighing approximately 31.88 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for precision tool and die applications where tight dimensional control matters before and after hardening.

O1 tool steel flat stock is used across toolroom, job shop, and industrial manufacturing environments. Typical applications include blanks for punches, dies, gauges, fixtures, and cutting tools. This size is commonly cut to length or machined to final geometry before oil-quench hardening. The 36-inch length accommodates a range of workpiece layouts without requiring additional splicing. Machinists and tool and die makers working with manual mills, surface grinders, and EDM setups will find this stock dimensionally consistent from piece to piece.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent heat-treat response
• Thickness held to plus or minus 0.001 inches for tight pre-machining control
• Width tolerance of 0.000 to minus 0.005 inches ensures predictable stock removal
• Length tolerance of plus 0.015 inches supports cut-to-length workflows without undersize risk
• Edge squareness maintained to 0.003 inches per inch for reliable reference surfaces
• 31.88-pound bar suitable for medium to large tooling blanks

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock for general toolroom and precision machining applications requiring AISI Type O1 material specification.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists or tool and die makers using appropriate cutting fluids and personal protective equipment. Secure the workpiece firmly before any machining or sawing operation. Heat treatment, including oil quenching, should follow established metallurgical procedures and applicable shop safety protocols. Avoid grinding dry without adequate coolant flow to prevent surface decarburization or thermal stress cracking.