Crimping apparatus

An apparatus for crimping a coupling to a hose end which comprises a crimping ring having its inner wall formed as a tapered camming surface, a plurality of circumferentially-disposed crimping dies each having an outer die member having an opposed tapered camming surface for cooperation with the camming surface of the crimping ring and an inner die member releasibly mounted on said outer die member and having a crimping surface for crimping a coupling to a hose end, hydraulic piston and cylinder means for moving the crimping ring or the crimping dies axially relative to one another from a start position to an end position so that cooperation between the camming surfaces causes a transverse movement of the crimping dies inwardly of the crimping ring and parallel to the plane thereof to provide a crimping action, said cylinder having a stop against which said piston will bear during the operation of the apparatus whereby the movable one of the crimping ring and the dies are moved through the same axial distance each time of operation irrespective of the extent of crimp desired, and means for adjusting the relative axial position between the crimping ring and the dies at said start position so as to provide adjustment for the extent of the crimp by a corresponding adjustment of the relative axial position between the crimping ring and dies at said end position.