Application overview
How NSK bearings are specified for Electric Motors, Pumps & Fans
The right NSK bearing for this application is defined by its full part number, its position in the assembly and its exact execution, not by bore and outside diameter alone. Feed Mechanisms Company supplies genuine NSK bearings matched to that complete specification.
Industrial motors, centrifugal pumps and fans run on deep groove ball bearings at drive and non-drive ends, with self-aligning, angular contact or cylindrical roller bearings in heavier or thrust-loaded positions. Running continuously means noise, heat and seal condition decide service life. Maintenance teams need the original seal type and clearance, so replacements behave the same as the bearings they remove.
- Match the full suffix for shields or seals (ZZ, 2RS, open) and internal clearance (such as C3) instead of ordering by bore and outside diameter alone.
- Separate drive-end and non-drive-end bearings on the maintenance list, because the two ends often use different sizes or structures.
- Use angular contact pairs on pump shafts with axial thrust, and confirm the mounting arrangement before ordering.
- Choose self-aligning ball bearings where fan shafts can deflect or housings may be slightly out of line.
Selection checkpoints
Four points we confirm on every enquiry before the bearing is quoted.
- 01
Complete part number
- Full NSK suffix, not a shortened stock code
- Original seal or shield type
- Internal clearance and precision class
- 02
Matched set and preload
- Paired or grouped sets for spindles and feed axes
- Preload arrangement checked before dispatch
- Speed and lubrication taken into account
- 03
Exact execution
- Special structures matched to the machine specification
- Adapter sleeve or housing model recorded
- Alternatives listed separately, changes approved by you
- 04
Genuine NSK, documented
- Original NSK packaging
- Certificates and full documentation
- Measurement report where the order requires it
