Abstract: A chuck for a meat encasing machine has an elongated body having an inlet end and a discharge end. The body has an elongated hollow bore extending therethrough and an exterior cylindrical surface. A plurality of radially extending flutes are in the bore of the body for purposes of grasping and imparting rotational motion to a filled meat casing. An annular groove extends around the exterior cylindrical surface of the body member. A resilient O-ring is mounted in the groove and slightly projects outwardly from the groove to frictionally engage a socket into which the chuck is inserted.