The needle roller bearing is a variation of the cylindrical  roller bearing. The main difference is in roller design capacity. The rollers  are thinner in diameter, but there are more rollers per bearing. Full  complement needle roller bearings do not have a cage.
  
Needle roller bearings are ideal for many applications such as  transfer cases, valve trains, axle supports, outboard engines, textile industry  machinery, power tools, copiers, fax machines, paper moving equipment. 
                                |