Page 589 - Rollingbearings

Designs and variants
Basic design bearings Needle roller bearings with Arrangements with other
machined rings, without langes bearings
Needle roller bearings with
machined rings, with langes • are separable, i e the outer ring, needle To accommodate combined radial and axial
roller and cage assembly, and inner ring, loads, needle roller bearings with machined
• are available open (without seals) or can all be mounted separately (ig. 19) rings can be combined with a needle roller
sealed on one or both sides Needle roller and cage assemblies can, thrust bearing with a centring lange, AXW
• are available with or without an inner ring depending on the arrangement design, series, if the outside diameter D of the radial
• with D ≤ 17 mm (F ≤ 10 mm), are availa- either be mounted: bearing is equal to the lange diameter D of
1
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ble with non-separable closure rings that – together with the outer ring the thrust bearing (ig. 21, and Needle roller
act as langes (ig. 16) – together with the shaft thrust bearings, page 895)
The langes on larger bearings are an – together with the inner ring
integral part of the outer ring, and the – between the outer ring and shaft or
bearings have an annular groove and one inner ring as the inal step
or more lubrication holes in the outer ring However, needle roller and cage
(ig. 17) assemblies and bearing outer rings
• are generally designed as single row bear- must always be kept together as
ings, with the exception of RNA 69 (ig. 18) supplied
and NA 69 series double row bearings • are generally designed with one needle
with D ≥ 52 mm (F ≥ 40 mm) roller and cage assembly
w
However, wide sizes incorporate two
The roller and cage assembly and outer ring needle roller and cage assemblies imme-
of a needle roller bearing with langes form a diately adjacent to each other and have an
non-separable unit annular groove and a lubrication hole in
the outer ring (ig. 20)

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Fig. 17 Fig. 18
Needle roller bearing with integral langes Double row needle roller bearing with
in the outer ring langes

NK (F w ≥ 12 mm) RNA 69 (F w ≥ 40 mm) Fig. 21
NKS
RNA 48, RNA 49 Needle roller bearing with a needle roller
RNA 69 (F ≤ 35 mm) thrust bearing
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Fig. 19 Fig. 20
Separable design Double row needle roller bearing without
langes

Without an With an
inner ring inner ring

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