Overview
The JW-120 pipe rolling machine is a full-mechanical unit taking carbon steel pipe up to Φ120 × 8 mm, with a minimum rolling radius of Φ960 mm at the same 10D rule the whole JW range works to.
What separates it from the JW-80 is not really the diameter — it is the wall. Eight millimetres against two. Wall thickness is what sets rolling force, which is why the drive steps up to 22 kW and the frame to 6000 kg while the rolling speed stays at 8 m/min.
Quote the wall before the diameter
Two machines rated for the same outside diameter can behave completely differently on thick wall. A thin-wall Φ120 tube rolls easily and mostly risks flattening; a Φ120 × 8 mm pipe carries far more section modulus and will not move at all without the torque to drive it. When you size a rolling machine, the wall thickness is the number that decides the answer, and the diameter is second.
Rolling speed is 8 m/min here, identical to the JW-80 and JW-100. Speed in this process is set by how fast the metal can be worked without cracking, not by how big the machine is.
Tooling and materials
Roller grooves are cut to your section — round pipe, square tube, angle, flat bar and profiles. Carbon steel is the reference material for the rated capacity; other materials run with matched grooves and adjusted passes.
Typical work: heavy handrail and structural curves, pressure vessel and tank rings, large-diameter spiral coils, and pipe spool components that call for a long sweeping radius instead of a welded elbow.
