Starrett 57045 O1 Tool Steel Flat Stock 0.75x1.5x18 in

Product Description

The STARRETT 57045 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 0.75 inches thick, 1.5 inches wide, and 18 inches long, with a shipping weight of 5.74 pounds. Thickness and width tolerances are held to +0.0100 to +0.0150 inches, and length tolerance is +0.2500 inches. Edge squareness is maintained at 0.003 inches per inch across all edges. O1 tool steel is known for its machinability in the annealed state and its ability to achieve high hardness after oil quenching, making it a dependable choice for jigs, fixtures, punches, and cutting tools.

This flat stock is suited for job shops, toolrooms, and industrial fabrication environments where precision blanks are required. It is commonly used to machine custom tooling components, gauges, dies, and wear parts. Because the bar ships in annealed condition, it can be machined, ground, and shaped prior to heat treatment. Machinists and tool and die makers working with milling machines, surface grinders, and EDM equipment will find this stock size practical for a range of small-to-medium tooling projects.

Key Features

• AISI Type O1 oil-hardening tool steel for good machinability before heat treat and high wear resistance after quenching
• Thickness: 0.75 inches with tolerance of +0.0100 to +0.0150 inches
• Width: 1.5 inches with tolerance of +0.0100 to +0.0150 inches
• Length: 18 inches with tolerance of +0.2500 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Supplied in annealed condition, ready for machining and grinding prior to heat treatment

Compatibility

Designed as a standard O1 oil-hardening tool steel flat bar suitable for general toolroom and die-making applications requiring AISI Type O1 material in 0.75 inches by 1.5 inches cross-section.

Installation Notes

This flat stock is a raw material bar and is worked by machinists and tool and die makers using conventional metalworking equipment. Follow standard metalworking safety practices including proper machine guarding and eye protection. Heat treatment, including oil quenching and tempering, should be performed by qualified personnel following established metallurgical procedures for AISI O1 tool steel. Handle cut or ground edges with care, as burrs from machining can be sharp.