Needle Roller Manufacturer – NRA Round End & Loose Needle Rollers in Stock, ISO3096, Standard & Custom Sizes.
Round-end needle rollers (often designated as NRA type or simply "needle rollers with rounded ends") are engineered to provide superior performance in demanding applications. Unlike flat-end alternatives, the spherical or rounded end geometry offers distinct advantages:
Reduced edge stress concentration – The smooth transition at the roller ends minimizes contact stress with bearing flanges or housing shoulders, significantly lowering the risk of premature fatigue or edge chipping.
Enhanced lubrication film retention – The rounded profile promotes better oil film distribution at the roller ends, reducing friction and heat generation even under high-speed or oscillating conditions.
Accommodation of misalignment – In certain housing designs, round-end rollers allow slight angular deflection without compromising load-carrying capacity, making them ideal for applications where shaft or housing alignment cannot be perfectly guaranteed.
These characteristics make our round-end needle rollers the preferred choice for high-load, compact-space, and high-reliability applications across the automotive, aerospace, agricultural machinery, and general industrial sectors.
D1*L2.7,NRB,27000pcs D1*L2.8,NRB,6661800pcs D1*L3.2,NRB,66300pcs D1*L3.5,NRB,340000pcs D1*L3.8SS,NRB,209000pcs D1*L4,NRB,3196200pcs D1*L4NRB,975000pcs D1*L4.8SS,NRB,28800pcs D1*L5,NRB,855000pcs D1*L5.2,NRB,2613400pcs D1*L5.4SS,NRB,65000pcs D1*L5.5,NRB,67800pcs D1*L5.6SS,NRB,154200pcs D1*L6,NRB,387900pcs D1*L7.8SS,NRB,182000pcs D1*L8,NRB,654100pcs D1*L8.3SS,NRB,6200pcs D1*L8.8SS,NRB,182000pcs.
D1*L9,NRB,1650pcs D1*L9.2SS,NRB,150500pcs D1*L9.8,NRB,605800pcs D1*L15,NRB,236000pcs D1*L18,NRB,227900pcs D1*L19SS,NRB,62900pcs D1*L19.2SS,NRB,3100pcs. D1*L22NRA,NRB,9700pcs D1*L27.5,NRB,400pcs D1*L50,NRB,11450pcs D1.04*L5.8,NRB,17200pcs D1.05*L13NRA,40000pcs D1.05*L16NRA,45000pcs D1.05*L18NRA,191400pcs D1.05*L20NRA,52300pcs D1.07*L9,NRB,43800pcs D1.1*L3.2,NRB,43600pcs D1.1*L4.1,NRB,14900pcs D1.1*L13NRA,48500pcs D1.1*L16NRA,132400pcs D1.1*L18NRA,139100pcs D1.1*L20NRA66700pcs D1.1*L22NRA,20000pcs D1.14*L9,NRB,10400pcs D1.15*L8,NRB,62600pcs D1.15*L13NRA,55000pcs D1.15*L16NRA,169900pcs D1.15*L18NRA,60000pcs D1.15*L20NRA,38800pcs
As a specialized manufacturer of precision needle rollers, we understand that the performance, longevity, and reliability of your mechanical systems depend heavily on the quality of the rolling elements you choose. With years of dedicated expertise in the field, we have positioned ourselves as a trusted supplier of high-grade round-end needle rollers – a critical component widely used in automotive transmissions, industrial gearboxes, hydraulic systems, and compact bearing assemblies.