Rebar rib-peeling and threading machine To make thread on bar end. Bar ... Vulnerable partsRoller : for rolling thread on rebar end.1# roller , for 14mm-22mm rebar , pitch is 2.5mm, ... angle 60°/75°.2# roller , for 25mm-32mm rebar , pitch is 3.0mm , thread angle 60°/75°.3# roller , for 36mm-40mm ... rebar , pitch i 3.5mm , thread angle ...