NJ2222 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 NJ2222 model number is decoded

NJ2222 is an NTN NJ cylindrical roller bearing: two integral ribs on the inner ring and one rib on the outer ring — it locates the shaft in one axial direction, inside the 110×200×53 mm ISO 15 envelope. Numbering ties NJ2222 to its envelope: type code NJ, series NJ2200, 110 mm bore; the 200×53 mm outline therefore swaps dimensionally with other ISO 15 bearings of the same code, though rib arrangements differ by prefix. NTN prints the raceway diameters for this size — Fw 132.5 mm and Ew 178.5 mm — the envelope inside the 110/200 mm bore/OD where the rollers actually run. The 110 mm (4.331 in) bore and 200 mm (7.874 in) OD are ISO 15 boundary values; fillet and shoulder dimensions must still come from the NTN mounting table for the 53 mm-wide ring. Keep the open bearing wrapped until fitting: the line-contact raceways of the 110 mm bore indent under a single hard particle, and the steel cage provides no sealing of its own.

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.
• If the shaft must be located both ways, do not use NJ2222 alone: pair it with a locating bearing or specify the NUP execution with the matching loose rib ring from the 2203E table.
• Grease limiting speed 3,100 r/min and oil 3,700 r/min are different limits for NJ2222: the first is the cage/lubricant mechanical ceiling, the second assumes real oil flow rather than an oil bath.
• If the shaft must be located both ways, do not use NJ2222 alone: pair it with a locating bearing or specify the NUP execution with the matching loose rib ring from the 2203E table.
• The NJ rib arrangement is not interchangeable with another prefix on the same 110 mm seat: inner ring two ribs + one outer rib. Swapping NU for NJ changes axial location behaviour even though the 200×53 mm envelope matches.
• The 350/415 kN ratings, 44 kN Pu and 6430 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NJ2222 (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.