A rolling mill for rolling concave, rod-shaped bodies, said rolling mill comprising a rolling section with a plurality of mill stands and/or rolling dies arranged in succession to define a rolling axis Y, said rolling mill further comprising moving means for moving a mandrel and a hollow blank fitted on an end portion of said mandrel along said rolling axis Y and through said mill stands or rolling dies in succession,
- characterized in that said moving means are structured so as to move said mandrel and said blank along a rolling direction parallel to said rolling axis Y and through said mill stands or rolling dies in succession by applying a traction on said mandrel,
- characterized in that said moving means comprise an engaging operating head switchable between a first releasing configuration and a second engaging configuration and adapted to engage and alternatively release a shank integral with said end portion of said mandrel, wherein with said operating head in said second engaging configuration and engaged on said shank, the moving of said engaging operating head along a direction parallel to said rolling axis Y results in said mandrel and said blank being translated along said rolling axis Y and through said mill stands or rolling dies in succession,
- characterized in that said engaging operating head comprises at least one first rocker arm adapted to be switched to pivot between a first position and a second position, and in that switching of said at least one first rocker arm from said first position to said second position results in said operating head being switched from said first releasing configuration to said second engaging configuration, while switching of said at least one first rocker arm from said second position to said first position results in said operating head being switched from said second engaging configuration to said first releasing configuration,
- characterized in that the rolling mill comprises switching means for switching said at least one first rocker arm alternatively between said first and second positions,
- characterized in that said at least one first rocker arm is hinged on a point integral with a traction rod of said moving means, in that said traction rod is housed at least partially in a tubular jacket which is translatable with respect to said traction rod, and in that a translation of said tubular jacket with respect to said traction rod in a first translation direction results in said at least one first rocker arm being switched from said first position to said second position, while a translation of said tubular jacket with respect to said traction rod in a second translation direction opposite to the first translation direction results in said at least one first rocker arm being switched from said second position to said first position.