O-1 Flat Bar Tool Steel Oversize Oil Hardened is a precision ground tool steel manufactured for machining, tooling, and fabrication applications requiring excellent wear resistance and dimensional stability. The 1/8″ x 1-1/4″ (.125″ x 1.250″) flat bar is supplied in an oversize condition to allow for finish grinding or machining to exact dimensions after heat treatment. O-1 tool steel is an oil-hardening grade known for its high hardness, good toughness, and ease of machining in the annealed state, making it ideal for custom tooling and precision components. Sold in 18″ or 36″ lengths to accommodate a variety of shop and production requirements.

Applications:
O-1 Flat Bar Tool Steel is commonly used in precision tooling and industrial applications, including:
• Cutting tools and machine knives
• Dies, punches, and blanking tools
• Jigs, fixtures, and gauges
• Wear plates and precision machine components
• Bushings, shims, and spacers
• General tool room and fabrication projects

Advantages:
• Oil hardening steel: Minimizes distortion during heat treatment
• Precision ground oversize stock: Allows finishing to exact tolerances
• Excellent wear resistance: Suitable for high-contact tooling applications
• Good machinability: Easily machined in the annealed condition
• High hardness capability: Can achieve excellent edge retention and durability
• Versatile material: Suitable for custom tooling, repair, and fabrication work
• Multiple length options: Available in 18″ or 36″ lengths for flexibility and reduced material waste

Summary:
The 1/8″ x 1-1/4″ (.125″ x 1.250″) O-1 Flat Bar Tool Steel Oversize Oil Hardened stock is a durable, precision-ground tool steel designed for machining, tooling, and wear-resistant applications. Available in 18″ or 36″ lengths, its excellent hardness potential, dimensional stability, and machinability make it an ideal choice for dies, fixtures, cutting tools, and custom precision components.