1. Tolerance
ZWZ metric tapered roller bearings have general tolerances, and products with tolerances of P6X, P6, P5, P4, and P2 are also available, all complying with GB307.1.
ZWZ inch tapered roller bearings have general tolerances, and CL2, CL3, CL0, CL00 tolerance products can also be provided according to needs.
Radial clearance
ZWZ single row tapered roller bearings only have clearance after installation, and can be determined after adjustment by another bearing positioned in the opposite direction.
2. Cage
Tapered roller bearings are generally stamped with steel plates and have a basket-shaped cage, but when the size is larger, they also use car-made solid pillar cages.
(1) When the outer diameter of the bearing D≤650mm, the steel plate stamped cage is used, and the rear code of the cage is not marked
(2) When the outer diameter of the bearing D>650mm, the steel solid pillar cage is used, and the code behind the cage is not marked
3. Allowable error
Equivalent dynamic load
P=Fr KN] When Fa/Fr≤e
P=0.4Fr +YFa [KN] When Fa/Fr>e
When single-row tapered roller bearings are used in pairs (the basic dimensions can be different), the additional axial force caused by the radial load must be taken into account when calculating the equivalent dynamic load of the bearing. The additional axial force S of a single-row tapered roller bearing can be calculated approximately as follows: S= Fr/2Y
Equivalent static load
Single row tapered roller bearings
P0=0.5Fr +Y0Fa KN]
If P0
Double row and four row tapered roller bearings
P=0Fr +Y1Fa [KN] When Fa/Fr≤e
P=0.67Fr +Y2Fa　[KN] When Fa/Fr>e
4. Suffix definition
A: Internal structure changes
B: Increased contact angle
X: External dimensions adopt international standards
CD: Double outer ring, with oil hole or groove.
TD: Double inner ring with tapered hole.