This is the slef-aligning rotators in pipe and vessel welding systems. It has four motorized rollers which use worm gears to assure a smooth rotation and is self-adjusting through a wide range. Commonly used in pressure vessel fabrication, wind power, small and large pipe sections, boiler vessels, heat exchangers, shipyards, cladding and many more. 

Notes:

1   Remote control box(by hand):wire   /   wireless 

2   Wheels material : Rubber with 2 metal wheels clamping    /   PU material  /  45# forging  steel 

3   Control motor :one motor with 3 reducers  /  two motors with 2 reducers    

4   Power  /  Idler moving  : by hand  /  by  motor