N2218EA 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 N2218EA model number is decoded

For pure radial duty on a 90 mm shaft NTN supplies N2218EA: two integral ribs on the inner ring and a ribless separable outer ring; the open execution is rated 3,500 r/min on grease and 4,900 r/min on oil. The leading N defines the rib arrangement (inner ring ribbed, outer ring ribless); the dimension-series digits and the two-digit bore code resolve to 90 mm, with 160 mm OD and 40 mm width from the ISO 15 general plan. NTN prints two speed ceilings: 3,500 r/min grease and 4,900 r/min oil — the pressed-steel cage and lubricant film set the real limit at the 90 mm bore. Rating life at 286 kN C assumes clean oil and adequate film; the 35.5 kN Pu floor means contamination derating — not the C rating alone — governs adjusted life in dusty gearboxes. Provide axial location with an adjacent locating bearing rather than expecting the float cylindrical set to hold thrust on the 90 mm shaft.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Induction-heat the 90 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 160 mm raceway.
• The 35.0 mm section at 90 mm bore leaves a narrow oil path; with the EA pressed-steel-cage cage the relubrication groove and oil-level design must keep grease from churning in the 40 mm-wide cavity.
• The 35.0 mm section at 90 mm bore leaves a narrow oil path; with the EA pressed-steel-cage cage the relubrication groove and oil-level design must keep grease from churning in the 40 mm-wide cavity.
• The 40 mm width and abutment faces must be square to the axis; a tilted spacer concentrates load across the roller set and shows as uneven raceway polish on the 90 mm inner ring.
• If the shaft must be located both ways, do not use N2218EA alone: pair it with a locating bearing or specify the NUP execution with the matching loose rib ring from the 2203E table.
• The 286/315 kN ratings, 35.5 kN Pu and 3200 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for N2218EA (EA pressed-steel-cage 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.