UCFL211 bearing: complete specifications & equivalents

Specification table

Source: catalog reference (CAT. No. 2203-3/E 2024) · extracted 2026-09-25

Parameters extracted from the official NTN Ball and Roller Bearings catalogue (CAT. No. 2203-3/E 2024); NTN® is a trademark of NTN Corporation, used here for identification only — mpnbase is not an authorized NTN distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at ntnglobal.com.

Cross references & equivalents

Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.

How the UCFL211 model number is decoded

The NTN UCFL211 flanged unit combines a sealed UC211D1 insert with a diamond-shaped FL211 cast-iron housing that bolts flat against a machine frame. Reading the designation: UC marks the wide-inner-ring, setscrew-locking insert; FL marks the two-bolt rhombus flange housing; the 2 code identifies the duty series and the final two digits encode the 55 mm bore. Key mounting figures: flange height H = 224 mm, overall length L = 130 mm across the diamond, bolt centres J = 184 mm, and each ear takes a 19 mm (M16) fastener for the 55 mm shaft. The 2-series section is the standard-duty choice — the slimmest, lightest housing at this bore, selected when shaft speed and load are moderate and space is normal. The diamond flange carries the shaft square to a vertical face — a welded frame, side plate or gearbox wall — so no base plinth and no shim pack under the bearing are required. At 55–90 mm bore the units carry serious conveyor, fan and crusher-feed drives; housing stiffness, foundation condition and bolt torque matter as much as the insert rating. Small marine and dockside conveyors use this unit with stainless fasteners through the feet; the cast iron tolerates salt atmosphere far better than pressed-steel housings once paint is chipped. In wet or washdown positions, orient the grease fitting at 45° and purge after every wash; water trapped between the slinger and lip seal emulsifies the grease even when the unit is sealed. Basic ratings of the UC211D1 insert are 48 kN dynamic and 29.2 kN static; the assembled UCFL211 weighs about 2.9 kg.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 55 mm bore the 130 mm base of UCFL211 is a structural member: grout or machine the foundation, because a bedded-on-edges housing concentrates the full belt pull on two cast feet.
• The standard 2-series insert in UCFL211 is the lightest section at 55 mm — do not substitute it into a position that previously ran an X or 3 unit: the 184 mm mounting may match while the load rating does not.
• As a rhombus flange, UCFL211 pulls against the frame through only two M16 bolts on 184 mm centres; the mounting plate must be stiff enough not to bend between them under belt load.
• The D1 suffix on UC211D1 means the greasable execution; a unit without it has no fitting path, so do not assume every UCFL211 on site accepts relubrication.
• Self-aligning is not the same as free to move: the UC211D1 insert of UCFL211 pivots to correct static misalignment, but a continuously bending shaft still frets the spherical seat.