NAFC200 Series Flange Cartridge Bearing Units
NAFC200 uses the same general idea of a round four-bolt cartridge housing, but the shaft connection is different from the common UCFC arrangement. Its eccentric locking system is the feature that should drive the purchase decision, especially when the existing machine already uses an eccentric-collar style insert.
For replacement work, the housing outline alone is not enough. A unit can look nearly identical from the front and still be wrong once the insert projection, locking collar, shaft direction and service access are considered. NAFC200 should therefore be matched as a complete housing-and-locking arrangement rather than treated as a cosmetic flange substitute.
For a wider housing comparison, browse the bearings range before finalising the mounting style.
Machines where this locking arrangement is often preferred
These are application patterns where the housing concept is commonly considered. Final suitability still depends on load, speed, alignment, environment and the machine designer’s requirements.
Directional conveyor drives
An eccentric-lock cartridge can suit equipment where a directional shaft drive and existing collar-style maintenance practice are already established.
Roller and line-shaft modules
The round flange allows the support to be carried on a plate rather than on a pedestal.
Ventilation equipment
Compact end plates and fan frames often benefit from a bearing unit that stays close to the mounting face.
OEM replacement programs
NAFC is useful when a machine family has standardised on eccentric locking and purchasing wants to maintain the same service method.
NAFC200 published technical range
The table below keeps the catalogue values used for this series. Use the model-specific drawing for the final interchange decision; dimensions and suffixes can vary inside a family.
| Specification point | NAFC200 catalogue data |
|---|---|
| Series / model family | NAFC201S / NAFC201 to NAFC215 |
| Duty class | Standard duty |
| Locking / bearing mounting | Eccentric locking |
| Published shaft range | 12-75 mm |
| Published metric / inch options | 12, 15, 17, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75 mm |
| Housing / mounting style | 4-bolt round flange cartridge housing |
| Housing construction | Cast iron |
| Catalog dimensional fields | D2, P, J, A2, N, L, H1, A1, D1, S, Z, bolt size and weight |
| Published unit weight | 0.60-8.00 kg |
The detail that separates NAFC200 from other cartridge units
Eccentric locking collar
The shaft is secured by an eccentric locking arrangement rather than the two radial setscrews typical of UC-style inserts.
Four-bolt round flange
The cast-iron cartridge housing keeps the compact face-mounted geometry used across the FC family.
12-75 mm catalogue coverage
The published range covers standard metric shaft sizes from 12 mm through 75 mm.
Drawing-led interchange check
Pilot, bolt-circle and insert dimensions should be compared together; matching only the mounting holes is not sufficient.
Service access around the locking collar
Do not position guards or brackets so close that the eccentric ring cannot be set or released.
A worn or damaged shaft can defeat a correct bearing selection; check the seating area before installing the new insert.
Seat the round housing evenly against the pilot or frame face before the mounting bolts reach final torque.
Marking the replacement as NAFC rather than a generic FC unit reduces the chance of a future locking-method mismatch.
A replacement check built around the eccentric lock
Use the product drawing as the final dimensional authority. The points below are practical filters that help narrow the correct model before a full drawing comparison.
If the removed unit uses an eccentric collar, keep that feature in the replacement shortlist before comparing outside dimensions.
Make sure there is room to set, tighten and later release the locking collar without removing surrounding machine parts.
Compare pilot diameter, bolt pattern, housing thickness and centre position to the existing mounting.
Where the application has defined shaft rotation, follow the machine or insert manufacturer procedure for setting the eccentric lock.
When NAFC200 is the better match
NAFC200 is most useful when an eccentric locking arrangement is part of the machine design or maintenance standard. UCFC200 is the more direct alternative for setscrew locking, while UEFC200 uses concentric locking. UKFC200+H changes the selection logic again by using a tapered bore and adapter sleeve.
Send the machine details for a model check
For NAFC200, send the existing model marking, shaft diameter, mounting dimensions and a photo of the bearing position. GBC can review the information against the published series before quotation. Email: sales@australia-drive.com.
