NAFS 4-Bolt Flange Bearing Units
NAFS is a standard duty series configured around 4-bolt flange bearing units. Its catalogue definition uses eccentric locking, with individual bore and dimensional variants retained in one model table.
Series Overview
The page keeps the full series together because housing geometry and locking method define the product family more clearly than a single bore size. Exact unit numbers remain in the source table for side-by-side checking.
The series can also be compared with other mounted-bearing families when the machine design is still open. Start from the bearing index, then return to the drawing that best matches the mounting interface. Browse related bearing families.
Series-Level Selection
NAFS is treated as one catalogue series, with individual unit numbers retained inside the dimensional table.
Mounting Form
The primary configuration is 4-bolt flange bearing units, intended for rigid face mounting around a shaft passing through a machine frame.
Locking Logic
The catalogue identifies eccentric locking for this series; confirm the exact row before ordering.
Technical Specifications
The table below records the series-level facts visible in the supplied catalogue heading. Model-specific dimensions are deliberately kept in the original dimensional table so values are not detached from their unit numbers.
| Series | NAFS |
|---|---|
| Catalogue Reference | Part B, page B24 |
| Product Family | 4-Bolt Flange Bearing Units |
| Duty Classification | Standard duty |
| Locking / Mounting Method | Eccentric locking |
| Inner Ring / Bore Form | Wider inner ring / series-specific bore |
| Housing / Configuration | 4-Bolt Flange Bearing Units |
| Material Note | Material varies by unit; confirm selected model |
Engineering Drawing
The drawing is placed directly before the dimensional reference because installation space is usually the quickest way to rule a series in or out. Match the drawing labels to the corresponding columns in the catalogue table before releasing an RFQ.
Applications
Conveyor side frames
NAFS is relevant when conveyor side frames requires this housing format; verify shaft geometry, mounting interface, operating conditions and environment before final selection.
Processing and packaging machinery
For processing and packaging machinery, this series provides the catalogue mounting form shown above. Confirm load, speed, shaft dimensions and service environment for the chosen model.
Material-handling equipment
NAFS is relevant when material-handling equipment requires this housing format; verify shaft geometry, mounting interface, operating conditions and environment before final selection.
Catalogue Dimensional Data
The dimensional data is retained as one complete source table. This is especially useful when adjacent sizes share a housing but differ in shaft, inner-ring or mounting dimensions.
Selection & Integration
Begin with the machine mounting envelope, then confirm the shaft and locking arrangement. A similar series code does not guarantee the same center height, bolt pattern, cartridge fit, slot geometry or inner-ring dimensions. In this family, the intended role is rigid face mounting around a shaft passing through a machine frame.
| Step | Information To Confirm |
|---|---|
| 1 | shaft diameter |
| 2 | four-bolt mounting pattern |
| 3 | shaft-to-face geometry |
| 4 | locking method and surrounding clearance |
The model code should be verified together with its dimensional row. This is particularly important where metric and inch variants share similar housings but differ at the shaft interface.
RFQ Support
Confirm The Exact NAFS Configuration
Quotation review is more reliable when the request includes the model row, shaft size and installation drawing. Add any corrosion, cleaning or maintenance requirement that could change the configuration. Ever Power Netherlands Branch can review the quotation basis against the same reference.