A&A Machine & Fabrication Announces Thread Rolling Capabilities


Striving to remain a leader in LDPE High Pressure component manufacturing, A & A Machine & Fabrication LLC now has the ability to provide rolled threads for your LDPE equipment, as an in-house service.

Thread rolling is a cold forming process that can be performed on ductile metal, a process that has been around for more than one hundred years. Thread rollers come in a variety of types and sizes, but they all use a mechanism where hardened steel dies, or rolls, are matched and set to penetrate, with force, in order to reshape the material surface of a round diameter into a thread form. Formed threads are preferred for high strength and critical applications like those found in the petro-chemical industry. Threads that are rolled, especially on heat treated parts, have higher tension, shear, and fatigue strength. No material is removed during the rolling process, eliminating one of the inherent weaknesses of cut or ground threads. No tool marks or stress risers occur during thread rolling. The cold formed properties include a higher density of material grains, or molecules, especially where they have been compacted along the lower flank of each thread pitch and in the root of the thread.

Studs, bolts, compressor piston rods and certainly LDPE HP tubing, which represents one of A&A's niche capabilities, are a few examples of parts which our customers prefer their threads rolled. Our tooling list for this technology at present allows for the rolling of various size threads between 7/8" to 5". Watch the video below and see this new capability in action.