SKF spherical roller bearing supplement code
SKF spherical roller bearings are one of the most commonly used types of roller bearings. They can accommodate heavy radial loads and even axial loads in both directions. These bearings provide longer service life due to their self-aligning capabilities, and they are suitable for applications with extreme operating conditions.
When ordering a SKF spherical roller bearing, it is essential to supply the bearing, the inner and outer rings, rolling elements and lubricant. If a situation arises where there is no possibility to supply the bearing with all the components, the bearing should be ordered with a supplement code.
A supplement code, which consists of a two-letter code, is used to request a variation of an SKF spherical roller bearing. The two-letter code denotes the type of bearing and the variation. A supplement code is usually applied in combination with a user number or the bearing designation depending on the purpose of the bearing.
The first letter in the supplement code denotes the basic design of the bearing. A for split for example, LS for inner ring guided, Y for stabilizing ring with the bore in the end section and so on.
The second letter of the supplement code denotes the modification of the bearing like an outer ring with an oil groove and lubrication holes, cylindrical bore, snap ring grooves and so on.
There are many different types of modifications to an SKF spherical roller bearing; however, the standard designations and supplement codes applied are the same. For example, the supplement code for an SKF spherical roller bearing with an extended inner ring on one side is X1. Similarly, the supplement code for an SKF spherical roller bearing with an oil groove in the outer ring is ZZ.
The most commonly used supplement codes for SKF spherical roller bearings are listed in the SKF Bearing Arrangement catalogue. This guide is available from authorized SKF agents or can be downloaded from the website.
Frequently used supplement codes
Some of the most commonly used supplement codes for SKF spherical roller bearings are as follows.
X1: for an SKF spherical roller bearing with an extended inner ring on one side.
Z: for an SKF spherical roller bearing with a cylindrical bore size.
ZZ: for an SKF spherical roller bearing with an oil groove in the outer ring.
RS: for an SKF spherical roller bearing with snap ring grooves on the outer ring.
AXK: for an SKF spherical roller bearing with an axial needle thrust collars, combined or split.
Overall, supplement codes are used to request a variation from the standard SKF spherical roller bearing. These codes help to identify the exact requirement of the customer while ordering a bearing, and thus they should be applied correctly.
