Acme threads produce a traversing motion on machines and tools. The Acme product is rolled in diameters from 1/8” to 7 1/2” and lengths to 40 feet. Right and left hand acme bar is available as well as multiple leads, Stub Acme forms, and classes 2C, 2G, 3C & 3G. Precision lead screw applications are accommodated by lead accuracy as close as .003 per foot and straightness to .001 per inch. Carbon steel, heat treated alloys, stainless steel, aluminum and nickel alloys can be rolled in Acme forms. Rolled Threads Unlimited carries over 400 sets of Acme thread rolling dies for in-feed and thru-feed applications in a wide variety of thread pitches and finish diameters.


  • ANSI/ASME B1.5
  • ASME/ANSI B1.8