the lebus groove winch have ovious advantge than the traditional groove or the smooth groove.

1)      Each one circle layer of the Grooved drum has two parallel groove and two groove section

2)      Make the cable even smooth ;load even distribution  

3)      Prevent  cross &mess  in cable rolling working happening

4)extend the rope life about 500%

If you winch is worn out  or the winch is not suitable for the new application,you no need to chage the whole,you only can make a lebus groove sleeve to install and melt in the drum.that is so conviment for chage the whole machine.
1)save money and time 
2)lebus will be advantage than smoth or traditional winch