Needle roller and cage assemblies are of single or double row design and comprise a cage and needle rollers. Since their radial section height corresponds directly to the diameter of the needle rollers, needle roller and cage assemblies allow bearing arrangements with the very smallest radial design envelope.
Needle cages are inexpensive and very easy to install. They can be fitted by hand without the use of tools. They may be manufactured in two parts and can then be mounted on an inner raceway between two shoulders. This arrangement allows the rigidity of the shaft to be increased.
The double cage, that is one having two rows of needles, comprises of two bearings side by side in one continuous unit. It allows parts such as idler pinions to be fitted easily and ensures their stability. The double cage can also be manufactured in two separate parts
NIBL manufacture’s cages in steel, polyamide, brass materials. Needle rollers used in these assemblies are made of high carbon chrome steel, hardened, ground and lapped to close tolerances for diameter and roundness.
The needle cages have both inward and outward retention for the needle rollers. The designs provide maximum cage strength consistent with the inherent high load ratings of needle roller bearings. Accurate guidance of the needle rollers by the cage bars allows for operation at high speeds. Needle roller and cage assemblies have either one or two rows of needle rollers
NIBL cages, manufactured in steel, offers the advantages of great rigidity, mechanical stability and low weight.
Cage needle bearings consist of cylindrical needle rollers assembled into a cage or retainer. The cage/retainer may be molded plastic. Common materials include polyamide (nylon), acetal (delrin) or other engineered plastics.
Very useful for applications where there is constraint of Radial space. Very high radial load carrying capacity compared to the size. Bearing arrangement allows the rigidity of the shaft to be increased. Very easy to install by hand without the use of tools.
Variations – Single row of needles; Double row of needles; split in two halves.
Size Range – Min. 6mm – 90mm Bore diameter
To make bearing arrangement, needles are placed directly between shaft & housing without the use of inner or outer rings. Thus a shaft of maximum diameter is permissible to increase rigidity & load capacity.
Variations – Needle rollers ends forms (Rounded, Flat Unground, Flat Ground); controlled profile of outside diameter of Needles/Rollers
Size Range – Needle Rollers 1mm to 6mm Diameter; Rollers 2.5mm to 12mm and above Diameter.
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