NU2214 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 NU2214 model number is decoded

NTN lists NU2214 on the 70×125 mm envelope, 31 mm wide: a line-contact radial bearing with a pressed sheet-steel cage and a grease limiting speed of 5,000 r/min. On the NTN nameplate NU states which ring carries the ribs, which determines whether NU2214 floats or locates; the numeric remainder is the ISO 15 series and 70 mm bore reference, not a fit or clearance instruction. Minimum radial load matters: an unloaded NU2214 at high speed skids its rollers and smears the raceway; spring preload or the rotor weight typically covers the requirement in motors and pumps. Selection arithmetic: Pu 18.4 kN is the fatigue load limit feeding the adjusted-life equation, and the C0/C ratio of 1.14 (151/132 kN) shows the high-static-capacity proportioning of this 70 mm bore. On NU arrangements confirm which ring is separable before heating: forcing the ribbed ring off over the roller complement damages the cage and rib faces.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Induction-heat the 70 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 125 mm raceway.
• The 27.5 mm section at 70 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 31 mm-wide cavity.
• Open NU2214 units need application-supplied sealing and a defined lubricant schedule; film thickness is the first failure mode for line contact when viscosity drops at the 70 mm contact.
• The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 132/151 kN pair here belongs to NU2214 as printed, not to the bare size.
• Do not replace NU2214 with a deep-groove ball bearing on rating alone: line contact gives 132 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 132/151 kN ratings, 18.4 kN Pu and 1440 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NU2214 (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.