Automatic machining of the chain stays to execute especially the following operations:

• Manual loading of the tube.
• Eventual ovalizing of the tube.
• Eventual press of one extremity to prepare it for the dropout welding.
• Bending of the tube.
• Press/forming of the tube.
• Punching of the second extremity to prepare it for the welding (to B/B).
• Tube unloading.