NU2222 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 NU2222 model number is decoded

NU2222 is the wide (22) section of the NTN NU2200 dimension series for a 110 mm shaft — 350 kN of basic dynamic capacity in a 6430 g, open bearing. On the NTN nameplate NU states which ring carries the ribs, which determines whether NU2222 floats or locates; the numeric remainder is the ISO 15 series and 110 mm bore reference, not a fit or clearance instruction. Minimum radial load matters: an unloaded NU2222 at high speed skids its rollers and smears the raceway; spring preload or the rotor weight typically covers the requirement in motors and pumps. Equivalent-load planning treats NU2222 as a pure radial bearing: keep P below 350 kN at the required L10, and let a paired angular-contact or thrust part carry any sustained axial component. Housing and shaft fillets must clear the ring chamfers of NU2222; an oversized radius locks the ring on its face and tilts the 53 mm-wide seat.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Induction-heat the 110 mm inner ring (max 120 °C) and mount it before fitting the outer ring; the ring mass makes square guidance essential — driving through the rollers brinells the 200 mm raceway.
• Never press either ring through the roller complement when fitting: mounting force goes through the ring faces, or the 200 mm race brinells and releases as vibration within hours.
• The NU rib arrangement is not interchangeable with another prefix on the same 110 mm seat: outer ring ribbed, inner ring ribless. Swapping NU for NJ changes axial location behaviour even though the 200×53 mm envelope matches.
• The 45.0 mm section at 110 mm bore leaves a narrow oil path; with the standard cage the relubrication groove and oil-level design must keep grease from churning in the 53 mm-wide cavity.
• Do not replace NU2222 with a deep-groove ball bearing on rating alone: line contact gives 350 kN radial capacity but the bearing cannot carry the thrust duty a ball bearing can and misalignment tolerance is only 3–4 arc-minutes.
• The 350/415 kN ratings, 44 kN Pu and 6430 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NU2222 (standard 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.