To select a suitable bearing,the load ,the speed, environmental influences and the amount of force needed to bring the transport unit into motion need to be considered.
1.Plain bores are simple,rugged and are greatly resistant to humidity, but have an unfavorable friction coeffcient,resulting in a relatively high starting and rolling resistance.
2.Roller bearings are rugged,have a low rolling resistance and a low radial bearing clearance
3.Ball bearings offer the best starting and rolling characteristics,the lowest bearing clearance,high load capacities and are suitable for higher speeds