Features
Following are the classifications for plummer blocks for use with self-aligning ball bearings of roller bearings.
SN and S series:
The SN5 and SN6 (S6) series are the most popular models have been widely used for many years.
The SN2 and SN3 (S3) series are the same basic size as the SN5 and SN6 (S6) series, respectively, but the bore sizes are different because the former series are constructed so that the bearing which has a cylindrical bore, is located on the shaft by means of a sleeve.
The SNZ2 and SNZ3 (SZ3) series are the same size as the SN2 and SN3 (S3) series, respectively. With these models, however, the bearing which as a cylindrical bore is fitted directly onto the shaft held by a nut ; therefore, the bore diameter of the housing on the side of the shoulder and the side of the nut are different.
Plummer blocks of these series are lightweight yet extremely rigid, and can be easily installed using two bolts.
SN .. F and S .. F series:
These series are the same size as the SN and S series. The housing in each of these models has a flat base to withstand heavier loads. These models do not have bolt holes, so users can drill two or four bolt holes, as desired, according to their own needs.
