Needle roller / thrust ball bearings combine a radial needle roller bearing and a thrust ball bearing. Supplies these bearings in the following two series:
NX series ( fig. 1), a needle roller bearing with a full complement thrust ball bearing
NKX series ( fig. 2), a needle roller bearing with a thrust ball bearing with a cage
Supplies the bearings in both series without an inner ring. However, for applications where it is not possible to harden and grind the shaft, the needle roller bearing can be combined with an inner ring ( fig. 3).
Needle roller / thrust ball bearings,
NX series
Needle roller / full complement thrust ball bearings in the NX series are suitable for applications where there are moderate radial loads and lighter, single direction axial loads. Their extremely low sectional height enables shaft centerlines to be positioned close together as is the case for multi-spindle drilling machines.
For axial support, the bearings may be mounted against a shoulder or snap ring in the housing bore. The snap ring groove in the outer ring provides a cost-effective and axially space saving arrangement. The appropriate snap rings are listed in the product tables.
Needle roller / thrust ball bearings in the NX .. Z series should be grease lubricated. Supplies the thrust ball bearing in this series filled, as standard, with a high-quality grease with good rust inhibiting properties. The cover, which has no lubrication holes, forms a gap-type seal with the shaft washer to retain the grease in the bearing.