Application overview
How NSK bearings are specified for CNC Feed Axes & Ball Screws
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.
CNC retrofit and repair work on feed mechanisms and linear axes covers ball screw support bearings, thrust bearings at the screw ends, linear guides and linear bushings. These bearings carry combined axial loads while the axis has to hold position to tolerance under repeated reversals. Buyers need the correct execution, axial rigidity and a fit they can verify when the parts arrive.
- Specify ball screw support bearings by complete execution and set arrangement so axial rigidity and preload match the original axis design.
- Confirm guide rail size, carriage type (flange or block) and preload class together, so replacement carriages match the installed rail.
- Select sealed linear bearings and guide carriages where chips and coolant reach the axis, so contamination does not cut into positioning accuracy.
- List fixed-end and floating-end screw supports separately, so quantities and mounting positions do not get mixed up.
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
