The SMG 12 – 60 Bed Type Rebar Bar Threading Machine (1/2″ – 2.1/2″) are Bar threading machines designed to cut external threads on bars using a tangential chaser design, A threading chaser is used for cutting the thread onto the bar allowing the bar to remain stationary while the die-head rotates cutting the thread, Different types of threads can be cut on the bar such as BSW, NPT, UNF, METRIC, UNC, ACME, BSF threads, etc and Threading Capacity: 1/2″ to 2.1/2″