Drill Rod Tool Steels 57728 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 57728 is an O1 oil-hardening tool steel flat bar cut to 1/8 inch thick, 10 inches wide, and 18 inches long. O1 is an AISI-standard oil-hardening tool steel valued for its dimensional stability during heat treatment and its ability to hold a sharp, hardened edge after quenching. This flat stock is used by machinists, toolmakers, and die makers who need a ready-to-machine blank that can be hardened in a shop oil bath. At 6.44 pounds, it is a substantial piece suitable for fixture plates, punches, dies, gauges, and similar precision tooling components. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for close-tolerance work with minimal initial grinding.

This flat stock is appropriate for job shops, toolrooms, and production facilities that fabricate custom tooling in-house. The 10-inch width and 18-inch length provide enough material for medium-sized die plates, blanking tools, or multiple smaller blanks cut from one piece. Width tolerance is plus 0.005 inches, minus 0.000 inches, and length tolerance is plus 0.25 inches. Edge squareness is held to 0.003 inches per inch of thickness; end squareness to 0.004 inches per inch of thickness. These tolerances support layout and machining without requiring extensive pre-machining of the stock edges on every workpiece.

Key Features

• AISI Type O1 oil-hardening tool steel - stable geometry through the hardening cycle
• Thickness tolerance of plus or minus 0.001 inches for close-tolerance blanks
• Width tolerance of plus 0.005 inches, minus 0.000 inches
• Length tolerance of plus 0.25 inches
• Edge squareness: 0.003 inches per inch of thickness; end squareness: 0.004 inches per inch of thickness
• Ready-to-machine flat stock - no additional mill scaling or rough sizing required before layout

Compatibility

Designed as a standard AISI Type O1 oil-hardening tool steel flat bar suitable for toolroom fabrication of dies, punches, gauges, fixture plates, and similar precision components requiring oil-quench hardening.

Installation Notes

Machining and heat treatment of O1 tool steel should be performed by a qualified machinist or toolmaker familiar with oil-hardening procedures. Wear appropriate PPE when cutting, grinding, or hardening this material. Follow established shop procedures for oil-quench hardening, including proper preheat and quench oil temperature control. Consult AISI O1 material data and your facility safety plan before performing any heat treatment operations.