Automotive Car Wheel Bearing

A Typical Car Wheel Bearing

On most cars  whether front  or rear  wheel  drive  the  hub  to which the front wheel is bolted spins  on a stub  axle. The wheel can turn because the hub is mounted on inner and outer bearings.
Depending on the type and make of car, these  bearings  may either  be caged  ball  bearings  or, more  commonly,   roller  bearings which   move  against   inner   and outer  races fitted  to each side of the   hub.

 Usually these  roller bearings are tapered so that adjustment is possible. lhe bearings  are packed with grease to  keep  them constantly lubricated. The correct adjustment of tapered  earings is very important and, in most cases, this is a job which  can be done by a DIY mechanic.
  Bearings that have either too little or too much clearance  will  rapidly  wear  out and  will often start to make a rumbling or clicking   noise  which may be particularly noticeable when the car is cornering. Bearing noise is usually a sign  that  the bearing  is badly worn and in need of renewal.