NAF 4-Bolt Flange Bearing Units
NAF 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
This product page groups the complete catalogue series under one title. Engineers can compare the available unit numbers inside the dimensional reference instead of moving between many nearly identical SKU pages.
Series selection works best from the machine interface outward: mounting face, shaft, locking method and finally the exact catalogue line. Related bearing families can be compared from the main bearing index. Browse related bearing families.
Series-Level Selection
NAF 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 | NAF |
|---|---|
| Catalogue Reference | Part B, page B18 |
| 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
NAF 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
NAF 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 full table is preserved as a WebP reference so every unit code remains aligned with its dimension columns. Zoom the image when checking closely spaced metric and inch variants.
Selection & Integration
Selection should move from fixed machine dimensions to the bearing code: first the mounting interface, then shaft size, then locking method and environment. This avoids choosing a familiar-looking unit that does not match the frame. 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 |
Use the catalogue page as the baseline and add project requirements separately. That keeps source-backed dimensions distinct from requested seals, covers, grease, materials or other options.
RFQ Support
Confirm The Exact NAF Configuration
Send the preferred unit number or shaft size with a drawing, quantity and mounting constraints. The catalogue page can then be used as a common reference during quotation. Ever Power Netherlands Branch can review the quotation basis against the same reference.