frustrum with a surface angle of approximately 30 u00b0 relative to axis 28 and its larger diameter is equal to and concentric with the lesser diameter of the third bore 70 a fifth bore 74 has a profile of a cylinder and its diameter is equal to and concentric with the lesser diameter of the fourth bore 72 the third bore 70 is a tapered bore having an effective diameter that is less than the outside diameter of tubing 14 such arrangement allows for uniform circumferential compression of the tubing 14 as the fitting 12 is axially forced onto the tubing 14 fig5 represents the completed joint where a means for preventing longitudinal separation of the tubing 14 and fitting 12 is illustrated and accomplished by a bead 76 being encapsulated within the crimped collar 100 during one of the last stages of operation the ram 22 is preferably an elongated cylindrical member that is connected to a conventional mechanical device that provides ample ramming force for creating a mechanical joint the mechanical device may be secured to the fixture 24 the method of forming the tube fitting assembly 10 will now be presented fig6 13 illustrate the individual steps the arrows illustrate the direction of the moving components fig6 is a simplified plan view of the first step of operation where the tube.