Types of needle roller bearings with machined rings

Needle roller bearings with machined rings are made of carbon chromium bearing steel. We supplies bearings with or without flanges on the outer ring. We supplies a wide assortment of needle roller bearings with machined rings.

Bearings with flanges

• are available open (without seals) or sealed on one or both sides
• are available with or without an inner ring
• with D ≤ 17 mm (Fw ≤ 10 mm), are available with non-separable closure rings that act as flanges
  The flanges on larger bearings are an integral part of the outer ring, and the bearings have an annular groove and one or more lubrication holes in the outer ring.
• are generally designed as single row bearings, with the exception of RNA 69 and NA 69 series double row bearings with D ≥ 52 mm (Fw ≥ 40 mm)
  The roller and cage assembly and outer ring of a needle roller bearing with flanges form a non-separable unit.

Bearings without flanges

• are separable, i.e. the outer ring, needle roller and cage assembly, and inner ring, can all be mounted separately
  Needle roller and cage assemblies can, depending on the arrangement design, either be mounted:
  • together with the outer ring
  • together with the shaft
  • together with the inner ring
  • between the outer ring and shaft or inner ring as the final step
  However, needle roller and cage assemblies and bearing outer rings must always be kept together as supplied.
• are generally designed with one needle roller and cage assembly
  However, wide sizes incorporate two needle roller and cage assemblies immediately adjacent to each other and have an annular groove and a lubrication hole in the outer ring.

Features of needle roller bearings with machined rings

• Low cross section
  In applications where less space is available, needle roller bearings offer a very compact solution.
• High load carrying capacity
  Despite their low cross sectional height, they have a high load carrying capacity.
• Separable design
  The possibility of assembling inner and outer rings separately permits interference fits for shaft and housing and also enables easy maintenance inspections.
• High stiffness
  Owing to their large number of small-diameter rollers, needle roller bearings with machined rings have high stiffness.
• Accommodate axial displacement
  Needle roller bearings with machined rings can accommodate axial displacement. When using raceways on the shaft, the displacement distance is not limited by the bearing.