Starrett 54483 O1 Tool Steel Flat Stock 3/4x3.5x36 in

Product Description

The STARRETT 54483 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, die makers, and maintenance shops requiring a reliable, ready-to-machine steel blank. Manufactured to AISI Type O1 specification, this flat stock measures 0.75 inches thick, 3.5 inches wide, and 36 inches long, weighing approximately 26.78 pounds. Thickness tolerance is held to plus or minus 0.001 inches, supporting precision layout and machining applications where dimensional consistency is critical before heat treatment. O1 tool steel is known for its good machinability in the annealed state and its ability to achieve high hardness after oil quenching.

This flat stock is suited for fabricating punches, dies, jigs, fixtures, gauges, and cutting tools in job shops, toolrooms, and production maintenance environments. The 36-inch length provides enough material for multiple workpieces from a single bar. Edge squareness is held to 0.003 inches per inch across all edges, reducing setup time when referencing off milled surfaces. It is appropriate for both small-batch tooling and one-off prototype work where tight pre-hardened tolerances matter.

Key Features

• AISI Type O1 oil-hardening tool steel — good machinability in annealed condition, high hardness after quench
• Thickness: 0.75 inches with plus or minus 0.001 inches tolerance
• Width: 3.5 inches with tolerance of minus 0 to minus 0.005 inches
• Length: 36 inches with plus 0.015 inches tolerance
• Edge squareness: 0.003 inches per inch on all edges
• Weight: 26.78 pounds per bar

Compatibility

Designed as a standard O1 tool steel flat stock blank suitable for toolroom, die shop, and general machining applications requiring AISI Type O1 oil-hardening material.

Installation Notes

Machining and heat treatment of O1 tool steel flat stock should be performed by qualified machinists or toolmakers familiar with tool steel handling procedures. Always clamp workpieces securely and use appropriate cutting fluids during milling or grinding operations. Oil quenching for hardening should be performed in a controlled environment following recognized heat treatment practices and applicable shop safety codes. Allow parts to fully cool and temper before putting hardened tooling into service.