There are many types of pumps, water pumps, slurry pumps, mortar pumps, chemical pumps, vane pumps, centrifugal pumps. ． ． ． ． ．

1. The most common bearing configurations are: short cylinder + deep groove ball such as NU306+6306.

Short cylinder + angular contact ball: such as NU310+7310BDB.

Short cylinder + double row angular contact ball: such as NU309+3309A.

2. Mortar pump: short cylinder + tapered roller bearing (double row)

3. Special special pump: double row angular contact + needle roller such as 3005-2Z + NKI20/20

4.Centrifugal pump: such as NU1052 + 23144