The Cold forming method is essentially simple – the shape of the end of the rebar to be threaded, is modified via a round accurately predetermined sized steel die set. The forming load is minimal and applied transversely to the grain flow of the material, this in effect aligns the grain flow of the ribs and the core diameter. The core diameter and ribs are formed to an accurate circular shape suitable to thread roll. For a standard thread suitable for the 32mm Type A rebar coupler this takes approximately 10 seconds.
Typical capacity / output from machinery: on average; 150 /180 pcs rebar ends per hour or 75 /90 pcs complete couplers ( with two threaded bar ends) per hour.