Drill Rod Tool Steels 57740 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 57740 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, die makers, and fabricators who require tight-tolerance raw material for cutting tools, jigs, fixtures, and precision components. The bar measures 3/16 inches thick, 8 inches wide, and 18 inches long and weighs 7.73 pounds. O1 tool steel is a general-purpose oil-hardening grade conforming to AISI Type O1, known for its good machinability in the annealed state and its ability to hold sharp edges after heat treatment. This stock ships in the soft, annealed condition and must be hardened and tempered by the end user or a heat treater before use in cutting or forming applications.

This flat stock is suited for small-shop and production toolroom environments where machinists need pre-cut blanks for hand tools, punches, dies, gauges, and similar toolroom parts. The 8-inch wide format provides enough cross-section to lay out multiple smaller blanks from a single piece, reducing material waste. Fabricators working in general metalworking, moldmaking, and light die work will find this size practical for a range of annealed-state machining operations prior to heat treat.

Key Features

• AISI Type O1 oil-hardening tool steel in the annealed condition for ease of machining before heat treatment
• Thickness tolerance of plus or minus 0.001 inches for precise fit in close-tolerance toolroom applications
• Width tolerance of plus 0.005 inches, minus 0.000 inches ensures the bar meets or exceeds nominal width
• Length tolerance of plus 0.25 inches allows full usable length without undersize cutoffs
• Squareness tolerance of plus or minus 0.003 inches on edges and 0.004 inches per inch of thickness on ends supports accurate layout and fixturing
• Single-piece minimum order quantity suitable for low-volume toolroom use

Compatibility

Designed as a standard AISI Type O1 oil-hardening tool steel flat bar for general toolroom and die-making applications requiring annealed stock in a 3/16 x 8 x 18 inch format.

Installation Notes

This material is supplied in the soft, annealed state and requires oil-quench heat treatment to develop full hardness. Heat treating O1 tool steel should be performed by a qualified heat treater following established metallurgical procedures for the grade. All machining, grinding, and drilling operations should be completed before hardening. Proper eye protection, machine guarding, and chip containment are required during all cutting and grinding operations on this stock.