Rope Coupling

Manufacturer and Supplier of Multi Mis-alignment Rope Coupling (MMRC) for Sugar Cane Mills.


The Multi mis-alignment coupling is a revolutionary concept for transmitting torques from gear to mill top. It replaces the square coupling and tail bars. Like all other couplings, the Rope Coupling consists of a driving half and a driven half. The coupling directly connects the final speed reducer of the Mill Drive to the Top Roller of the Mill. The driving half mounts on the final speed reducer output shaft square end and the driven half mounts on the square end of the mill top roller. Torque is transmitted from the driving half to the driven half by means of Polyester Slings hence the name ‘ROPE COUPLING’. Because of the Polyester Slings the design is completely flexible and absorbs large mis-alignments of the top roller with respect to the output shaft of the driving gear. These flexible elements forms balanced couples in a plane normal to the coupling axis. This eliminates in a single coupling the large bending moments and thrust generation that normally results from the axial and radial mis-alignments between gear and top roller.


  • Improves extraction performance of the Mill. The conventional Tail Bar obstructs free floating of the Mill Top Roller. The Multi Mis-alignment coupling does not impose any constraining thrust on the Top Roller. With free floating of Top Roller, the Mill operates at the designed setting and optimum hydraulic pressure and consequently performs more efficiently.
  • If installed on the last Mill, final Baggasse Moisture will be lower.
  • Mis-alignment between square end of the Gear shaft and the Top Roller either due to tilting of the Top Roller or initial alignment error in installations fully absorbed by the Rope Coupling. As a result no significant lateral thrust or bending moment is transmitted to the final gear.
  • Reduced Torque and Power consumption of Mill.
  • Breakage of crown pinion and top roller is completely eliminated.
  • Negligible maintenance.