Heavy duty roller bearingOverview: Heavy-duty needle roller bearings consist of a machined and ground channel-shaped outer ring with a complement of needle rollers retained and guided by a cage. The high-strength cage retains and guides the rollers. An optional lubrication groove and hole in the outer ring facilitate relubrication.These bearings can be used with or without a machined and ground inner ring, depending on the suitability of the shaft as a raceway surface.• S izes: Metric: 5 mm - 175 mm bore (0.19685 in. - 6.88976 in.).• Markets: Gear pumps, sheaves, automotive transmissions and two-cycle engines.• Features: Thick outer ring provides maximum load capacity and shock resistance with a relatively small radial cross section.• Benefits: Optimum speed and lubrication-retention capability.Entity needle roller bearing(Heavy duty roller bearing)NK,NKI,NA,NAV,NAO,HJ,BR,BRI BR364824BRI61812BR364828BRI82012BR405224BRI82016BR405228BRI102212BR445624BRI102216BR445628BRI122412BR486024BRI122416BR486028BRI142612BR526828BRI142616BR526832BRI142620BR567232BRI162816BR607632BRI162820BR648032BRI183020BRI203316BRI203320BRI223516BRI223520BRI243716BRI243720BRI243820BRI243920BRI264116BRI264120NK5/10TNNK8/12TNNK10/12NK12/12NK12/16NK14/16NK16/16NK16/20NK17/16NK18/20NK20/16NK20/20NK202616NK202620NK203312SXNK22/16NK223516NK25/16NK25/20NK26/16NK26/20NK30/20NK30/30NK32/20NK35/20NK40/20NK40/30NK42/20NK42/30NK43/20NK43/30NK45/20NK50/25NK50/35NK55/25NK60/25