UCP209 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 UCP209 model number is decoded

NTN ships the UCP209 as a matched assembly — UC209D1 insert swaged into the P209 cast-iron pillow block — so the fitter never has to set bearing-to-housing clearance. The code breaks down as insert family UC, housing form P (pillow block), duty series 2, bore code ending in the 45 mm shaft size; the unit is built from insert UC209D1 and housing P209. For layout work on UCP209: the 45 mm shaft centre sits 54 mm above the sole (H), the footprint is 190 mm long (L), bolt centres are 146 mm (J), and the foot holes suit M14 (17 mm) 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 upright base carries the shaft parallel to and above the mounting surface, which is the arrangement fan, conveyor and transmission drives use whenever a plinth or rail is available. Most general industrial shafting in the 25–50 mm range ends up on exactly this class of unit: designers trade the 2, X and 3 sections against conveyor centres and belt tension rather than against absolute capacity. On machine-tool ancillary drives — chip conveyors, coolant pumps, rotary feeders — this unit is chosen because the spherical fit tolerates a frame welded without precision fixtures. The spherical outer diameter of the insert must be free to pivot in the housing bore during alignment; never pin the insert or weld the housing before the shaft has been turned through several revolutions and the alignment set. Basic ratings of the UC209D1 insert are 36 kN dynamic and 20.4 kN static; the assembled UCP209 weighs about 2.2 kg.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The standard 2-series insert in UCP209 is the lightest section at 45 mm — do not substitute it into a position that previously ran an X or 3 unit: the 146 mm mounting may match while the load rating does not.
• As a pillow block, UCP209 needs a prepared horizontal surface at the 54 mm centre height: shim both feet with full-width packs so the 190 mm base seats over its full area.
• The lip seals and slingers on UCP209 suit ordinary industrial dust; submerged or heavy slurry service needs a different sealed arrangement regardless of the load rating.
• Never weld a bracket to the P209 housing of UCP209: local heat cracks cast iron and distorts the spherical bore that the insert depends on.
• With a 45 mm shaft the M14 foundation bolts of UCP209 must be re-checked after run-in — paint crush under the feet is enough to loosen both the feet and the setscrews.