Advantages of Combi ® Liners :
1 . Any profile with the desired face angle can be provided depending on the operational requirement of the mill .
2 . Weight of the lining system is less than that of the complete steel liners . Hence GD2 value of the mill with respect to motor will be lower .
3 . As weight of the liners are lesser , smaller size fasteners can be used compared to the metal liners .
4 . Number of lifts is irrespective of the number of fastening rows in the shell . This is a unique feature which makes this suitable for any type of retro fitment .
5 . Metal wear rate is much lower in this type of liner due to the resilience of the total system provided by the backup rubber against impact and attrition motion of the charge
6 . Metal wear rate due to the electro chemical effect is also minimised due to the presence of the backing rubber which acts as an electrical discontinuity .
7 . As this liner wears out , it becomes more stable in terms of distribution of metal and rubber . Hence , the degree of resilience increases which makes the load intensity gradually lower and the wear rate decreases upto some level of metal thickness . Beyond which , the wear rate again increases . This unique phenomenon makes the wear life of this liner significantly higher than the other liners as the force is less and the fastener sizes are smaller , compared to the metal .