Classification Method Of Rolling INA Bearings

Rolling INA bearings are classified according to the type and number of rows of rolling elements, the direction of the load they can bear, and whether they have automatic self-aligning function.

1. Classification by rolling element type
   Ball INA bearings – the rolling elements of INA bearings are steel balls;
   Roller INA bearings – the rolling elements of INA bearings are rollers.
   Generally speaking, the allowable speed of ball INA bearings of the same size is higher than that of roller INA bearings, and the load capacity of roller INA bearings is greater than that of ball INA bearings.
   According to the type of roller, INA roller bearings are divided into:
   (1) Short cylindrical roller INA bearings – among all INA roller bearings, this type of INA bearing has the highest allowable speed and is the most widely used.
   (2) Long cylindrical roller INA bearings – bear large loads but have very low allowable speeds;
   (3) Needle roller INA bearings – have compact radial dimensions and are increasingly widely used;
   (4) Spiral roller INA bearings – can withstand large impact loads at low speeds;
   (5) Tapered roller INA bearings – mainly withstand radial loads, but can withstand large axial loads;
   (6) Spherical roller INA bearings – are self-aligning INA bearings that can compensate for the non-collinearity error between the axis of the shaft and the seat hole within a certain range, that is, the misalignment error;
   (7) Symmetrical spherical roller INA bearings – are spherical roller INA bearings with a large load-bearing capacity, and the shapes of all rollers are spherically symmetrical.
2. Classification by the direction of the load that can be borne
   (1) INA radial bearings – can only bear radial loads, or are mainly used to bear radial loads and can also bear some small axial loads;
   (2) INA radial thrust bearings – used to bear radial loads and axial loads at the same time, generally mainly radial loads;
   (3) INA thrust bearings – while mainly bearing axial loads, they can also bear small radial loads;
   (4) INA thrust bearings – can only bear thrust loads