Value Collection OR03.5X1 O-1 Tool Steel Round 3.5in

Product Description

The VALUE COLLECTION OR03.5X1 is a decarburization-free O-1 oil-hardening tool steel round bar cut to a 1-inch overall length with a 3.5-inch diameter. O-1 tool steel is a general-purpose, oil-hardening grade known for good machinability, dimensional stability during heat treatment, and the ability to hold a fine edge after hardening. The decarb-free condition means the outer surface retains full carbon content, eliminating the need to machine away a decarburized layer before use. This bar is suited for machinists, toolmakers, and die shops working to close tolerances on tool and die components.

This round is a stock-length piece intended for shop use in fabricating punches, dies, gauges, bushings, and similar tooling components. The 3.5-inch diameter and 1-inch length make it practical for facing, boring, or turning operations where a short, large-diameter blank is required. It is appropriate for job shops, maintenance departments, and production toolrooms that work with oil-hardening tool steels on a regular basis.

Key Features

• Decarb-free condition — surface carbon content is intact, reducing prep time before machining or heat treating
• O-1 oil-hardening grade — stable dimensional change during hardening compared to water-hardening grades
• Diameter tolerance of plus 0.025 to plus 0.070 inches — oversize stock allows finish grinding to final dimension
• Length tolerance of plus 0.250 to minus 0.000 inches — stock is never short of nominal
• Weight per foot of 33.90 pounds — consistent with standard O-1 round bar density

Compatibility

Designed as a standard stock blank for toolroom and die shop applications requiring O-1 oil-hardening tool steel in round bar form at 3.5-inch diameter.

Installation Notes

Machining and heat treatment of O-1 tool steel should be performed by qualified machinists or toolmakers familiar with oil-hardening grades. Always follow established shop safety procedures when operating lathes, mills, or grinders. Heat treatment, including austenitizing and oil quenching, should be conducted according to the material supplier's published thermal processing guidelines. Handle heavy-diameter bar stock with appropriate lifting aids to avoid injury.