1.

Elevated Temperatures : Since high temperatures are the main cause of reduced bearing life in any application, having roller bearings located away from high temperatures is a good design concept.

2.

Quicker Bearing Replacement: Whenever the roller bearings do wear out, replacement is quick and easy with live shafts.

3.

Higher Allowable Loads : On a live shaft idler, the bearing size isn't limited to the size of the idler roll body. Therefore, larger bearings with higher load ratings can be used.

4.

Drive Rolls: Live shafts are ideal when driving a roll.