NU228E bearing: complete specifications & equivalents

Specification table

Source: catalog reference (NTN Ball and Roller Bearings CAT.No.2203E) · extracted 2026-10-01

Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN Ball and Roller Bearings CAT.No.2203E); 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 NU228E model number is decoded

The NTN order number NU228E denotes a 140×250×42 mm (5.512 × 9.843 × 1.654 in) cylindrical roller bearing in the NU200 family, the high-capacity pressed-steel cage of the E execution. Numbering ties NU228E to its envelope: type code NU, series NU200, 140 mm bore; the 250×42 mm outline therefore swaps dimensionally with other ISO 15 bearings of the same code, though rib arrangements differ by prefix. NTN prints two speed ceilings: 2,400 r/min grease and 2,800 r/min oil — the pressed-steel cage and lubricant film set the real limit at the 140 mm bore. Selection arithmetic: Pu 51 kN is the fatigue load limit feeding the adjusted-life equation, and the C0/C ratio of 1.18 (515/435 kN) shows the high-static-capacity proportioning of this 140 mm bore. After mounting verify the outer ring slides axially by hand at ambient temperature; a stuck float ring in a NU228E non-locating position preloads the bearing when the shaft grows.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 140 mm bore, oil-lubricated arrangements toward 2,800 r/min need positive flow and drain design; the NU228E ring stores enough heat that grease-only duty needs a careful relubrication calculation.
• Do not replace NU228E with a deep-groove ball bearing on rating alone: line contact gives 435 kN radial capacity but the bearing cannot carry the thrust duty a ball bearing can and misalignment tolerance is only 3–4 arc-minutes.
• Wide (22/23) and light (10/49) executions at 140 mm bore share bore but not OD/width; check the full NU200 series code before substituting, because housing and shoulder geometry will not interchange.
• Do not replace NU228E with a deep-groove ball bearing on rating alone: line contact gives 435 kN radial capacity but the bearing cannot carry the thrust duty a ball bearing can and misalignment tolerance is only 3–4 arc-minutes.
• If the shaft must be located both ways, do not use NU228E alone: pair it with a locating bearing or specify the NUP execution with the matching loose rib ring from the 2203E table.
• The 435/515 kN ratings, 51 kN Pu are NTN Ball and Roller Bearings CAT.No.2203E values for NU228E (E high-capacity execution); other makes sharing the ISO 15 envelope revise internal geometry without changing the order number, so keep the 2203E reference with the specification for critical drives.