Drill Rod Tool Steels 57901 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 57901 is an O1 oil-hardening tool steel flat stock used in toolmaking, die work, jig fabrication, and precision machining applications. Cut to 3/16 inches thick, 10 inches wide, and 36 inches long, this flat bar ships at 19.33 pounds and meets AISI Type O1 Oil Hardening material specification. O1 tool steel is known for its consistent response to oil-quench heat treatment, making it a reliable choice when machinists or toolmakers need a blank that will hold dimensional stability through hardening. Thickness tolerance is held to plus or minus 0.001 inches, which reduces hand-fitting time before heat treat.

This flat stock is suited to machine shops, tool and die operations, and metalworking trades that require pre-cut bar stock in standard dimensions. The 10-inch width provides enough material for medium-size die plates, stripper plates, punch holders, and similar flat tooling components. Length tolerance runs plus 0.5 inches, allowing the end user to face the stock to final length. Width tolerance is plus 0.005 inches with zero undersize deviation, supporting layout work without undersize concerns. Squareness is controlled to 0.003 inches edge and 0.004 inches per inch of thickness at the end.

Key Features

• AISI Type O1 Oil Hardening tool steel for predictable hardening response
• Thickness held to plus or minus 0.001 inches for close-tolerance blanks
• Width tolerance plus 0.005 inches, zero undersize - no undersize material
• Squareness controlled to 0.003 inches on edge, 0.004 inches per inch of thickness on ends
• 36-inch length with plus 0.5-inch length tolerance for face-to-finish operations
• Ships as a single piece at 19.33 pounds

Compatibility

Designed as a standard O1 oil-hardening tool steel flat bar for general toolmaking, die making, jig and fixture fabrication, and precision machining applications where oil-quench hardenable stock is required.

Installation Notes

Cutting and machining of tool steel flat stock should be performed by a qualified machinist or toolmaker using appropriate cutting fluids and carbide or HSS tooling rated for tool steel. Heat treatment, including oil quenching and tempering, should be carried out by personnel trained in metallurgical procedures following the material supplier guidelines for AISI O1. Always wear appropriate PPE when cutting, grinding, or heat-treating steel bar stock. Secure the workpiece properly before any machining operation to prevent movement.