Tube Notching Sub Assembly Heavy Fabrication Tube Notching Sub Assembly Heavy Fabrication Notching V-shaped indentation. Metalman Auto has made more than 6 In-house PLC Controlled Tube Notch Forming SPM. Swaging A process to reduce the cross section. Flaring Type of Cold Forging, using mandrel to increase the tube diameter. End Forming Type of Cold Forging to give a desired shape to tube ends using SPM. Fine Boring Highly precise boring process executed by the special fine boring SPM. PRODUCTS Notching Swaging Flaring End Formong Broaching