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NK21/20 needle bearing


22nd September 2015 Bearing products 0 Comments

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Needle bearing (needle bearing) Take cylinder roll to roll sub bearing son, relatively diameter its, get away son to be thin and long. This kind rolls the son calls rolling the needle. Though have smaller sections, the bearing still has higher load endurance, it contain needle bearing it is detailed it roll by son ‘ roll unless there aren’t diameters D sub, last 2.5 L/D,L for lasting lengths sub) ,So the radial is compact, when the size and loaded ability of its internal diameter are the same as other type of bearing, the external diameter is minimum, are especially suitable for installing the supporting result restricted in size in radial.


According to use different occasion, can select for use, have bearing of inner circle or get away stitch and keep a assembly, last that bearing inside journal surface and outer cover hole surface on it match bearing at this moment directly, outside roll by surface, in order to guarantee loaded ability and performance of operating and have the same bearing of one set of circles, a superficial hardness that axle or outer cover hole rolls, one is similar that the ones that answer with one set of circles of bearing in machining accuracy and surface quality roll. This kind of bearing can only bear the radial load.
The name of product: The new type of NK21/20 needle bearing: NK21/20 old type: NK21/20 internal diameter: 17( mm) External diameter: 29( mm) Thickness: 20( mm) Weight: -( kg) Use: Used in various mechanical equipment such as lathe, metallurgical machinery, fabrics machine and printing machinery, and can make the compactness very much that the mechanical system is designed dexterous. Type: Needle bearing










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