Drill Rod Tool Steels 01720 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 01720 is an O1 oil-hardening tool steel flat stock bar intended for precision toolmaking, die work, and machining applications where close dimensional tolerances are required. Manufactured to AISI Type O1 specification, this flat stock measures 5/64 inches thick by 1/2 inch wide by 36 inches long and holds a thickness tolerance of +/- 0.001 inches. The O1 grade is a general-purpose oil-hardening steel widely used by tool and die makers, machinists, and metal fabricators who need predictable hardening response and good dimensional stability after heat treatment.

This flat stock is suited for fabricating punches, dies, gauges, bushings, and small tooling components in job shop, maintenance, and production environments. The 36-inch bar length allows for multiple blanks to be cut from a single piece, reducing material waste. Its narrow 1/2-inch width and thin 5/64-inch thickness make it appropriate for precision blanks and small-profile cutting tools. Machinists and toolmakers working in both prototype and short-run production settings will find this stock ready for annealed machining followed by oil-quench hardening.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable hardening response and good wear resistance
• Tight thickness tolerance of +/- 0.001 inches for precision fit in close-tolerance applications
• Width tolerance of +0.005 / -0.000 inches maintains consistent stock sizing
• 36-inch bar length allows multiple blanks from a single piece
• Squareness tolerance of 0.003 inches on edges and 0.004 inches per inch of thickness on ends
• Length tolerance of +0.5 / -0.000 inches provides positive material allowance for finish cutting

Compatibility

Designed as an annealed flat bar stock for use in general toolmaking and die fabrication applications requiring AISI O1 oil-hardening tool steel in a 5/64 x 1/2 x 36 inch flat profile.

Installation Notes

Cutting and machining of tool steel flat stock should be performed using appropriate metalworking equipment by qualified machinists or toolmakers. Wear appropriate PPE including eye protection and gloves when cutting or grinding. Heat treatment, including hardening and tempering, should follow established procedures for AISI O1 steel and be performed by personnel with the appropriate equipment and experience. Always allow the bar to reach a stable temperature before precision measurement to avoid thermal expansion errors.