Starrett 54452 O1 Tool Steel Flat Stock 0.5x8x36 in

Product Description

The STARRETT 54452 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 0.5 inches thick, 8 inches wide, and 36 inches long, with a finished weight of 40.8 pounds. Thickness and squareness tolerances are held to plus or minus 0.001 inches, while edge squareness is controlled to 0.003 inches per inch. O1 tool steel offers excellent machinability in the annealed state and responds predictably to oil-hardening heat treatment, making it a reliable choice for shops that grind, mill, or profile tool blanks to final geometry.

This flat stock is suited for fabricating punches, dies, gauges, cutting tools, and general toolroom stock where dimensional consistency is required before hardening. The 8-inch width and 36-inch length provide enough material for medium to large tool blanks or multiple smaller pieces cut from a single bar. Machinists and tool-and-die makers working in job shops, production toolrooms, and maintenance departments are the primary users of this stock size.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat-treat response
• Thickness held to plus or minus 0.001 inches for close-tolerance toolroom work
• Width tolerance of 0.000 to minus 0.005 inches for consistent stock removal planning
• Length tolerance of plus 0.015 inches, zero minus
• Edge squareness controlled to 0.003 inches per inch on all edges
• 40.8-pound bar weight — plan lift assist or two-person handling during staging

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat bar suitable for use wherever O1 flat stock is specified in toolmaking, die making, or precision fabrication applications.

Installation Notes

Cutting, grinding, and milling should be performed in the annealed condition before heat treatment. A qualified heat treater or toolroom machinist should handle oil-quench hardening and tempering operations in accordance with AISI O1 recommended procedures. Secure the bar with appropriate workholding before any machining operation — flat stock of this size and weight requires stable fixturing. Personal protective equipment including safety glasses and cut-resistant gloves is required when handling and cutting tool steel bar stock.