UCFL206 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 UCFL206 model number is decoded

For a 30 mm shaft ending at or passing through a vertical frame face, NTN UCFL206 is the diamond-flange answer: UC206D1 insert inside the FL206 cast-iron housing. The UCFL206 number follows NTN's mounted-unit convention: housing letter FL, 2-series section, bore code for 30 mm; FL206 and UC206D1 are the separate housing and insert part numbers inside. Shaft size is 30 mm; the 148 mm overall-height flange is 80 mm long across the rhombus (L), with its two mounting holes on 117 mm centres (J) clearing 16 mm M14 bolts. 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. This mid bore range dominates agricultural and bulk-handling builds, where standard shafts, cast feet and greasable inserts keep replacement a stock-room, not a workshop, exercise. HVAC air-handling units carry fan shafts on this size, usually in warm roof-space air where the grease must be rated for continuous ambient temperature rather than load. On V-belt drives, align the pulleys before finally tightening the feet; the spherical seat lets you rotate the unit, but sliding the whole base on the foundation is what removes the belt-edge wear. Basic ratings of the UC206D1 insert are 21.6 kN dynamic and 11.3 kN static; the assembled UCFL206 weighs about 0.8 kg.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Never weld a bracket to the FL206 housing of UCFL206: local heat cracks cast iron and distorts the spherical bore that the insert depends on.
• The standard section of UCFL206 can look adequate at 30 mm while the X or 3 section is the real choice for long conveyor centres; compare ratings rather than fitting the same unit line-wide.
• The standard 2-series insert in UCFL206 is the lightest section at 30 mm — do not substitute it into a position that previously ran an X or 3 unit: the 117 mm mounting may match while the load rating does not.
• As a rhombus flange, UCFL206 pulls against the frame through only two M14 bolts on 117 mm centres; the mounting plate must be stiff enough not to bend between them under belt load.
• The lip seals and slingers on UCFL206 suit ordinary industrial dust; submerged or heavy slurry service needs a different sealed arrangement regardless of the load rating.