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Needle roller bearings
Needle roller bearings
2014-08-19 by seoerccy
Needle roller bearings (needle bearing) is a cylindrical roller roller bearings, relative to its diameter, roller both thin and long. Such as needle roller. Despite having a smaller cross-section, has a higher load bearing capacity, equipped with thin and long needle bearing roller (roller diameter D≤5mm, L / D≥2.5, L for roller length), Angular contact ball bearings so radial structure is compact, its diameter size and load capacity with other types of bearings, minimum diameter, especially for Radial Bearing mounting dimensions restricted results.
Depending on different occasions, can be used without an inner ring of the bearing or needle roller and cage assemblies, then journal surface and the surface of the bearing shell holes to match directly as the bearing outer rolling surface, to ensure the load capacity and operational performance there are rings with the same bearing, shaft or taper roller bearing housing bore raceway surface hardness, machining accuracy and surface quality should be similar roller bearing rings. Such bearings can only bear radial load. [1]
2 Features
With thin and long needle bearing roller (roller diameter D≤5mm, L / D≥2.5, L for roller length), so compact radial structure, the diameter size and load capacity are the same with other types of bearings , minimum diameter, especially for radial bearing mounting dimensions restricted results. Depending on different occasions, can be used without an inner ring of the bearing or needle roller and cage assemblies, then journal surface and the surface of the bearing shell holes to match directly as the bearing outer rolling surface, to ensure the load wind power bearing capacity and operational performance there are rings with the same bearing, shaft or housing bore raceway surface hardness, machining accuracy and surface quality should be similar roller bearing rings. Such bearings can only bear radial load. [1]



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