NJ2232 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 NJ2232 model number is decoded

NJ2232 is the wide (22) section of the NTN NJ2200 dimension series for a 160 mm shaft — 700 kN of basic dynamic capacity in a 21600 g, open bearing. The leading NJ defines the rib arrangement (inner ring two ribs + one outer rib); the dimension-series digits and the two-digit bore code resolve to 160 mm, with 290 mm OD and 80 mm width from the ISO 15 general plan. NTN ships these bearings open with normal (CN) radial clearance and P0 tolerance as standard; precision classes and C3/C4 clearance are separate order suffixes, not part of NJ2232. Rating life at 700 kN C assumes clean oil and adequate film; the 90 kN Pu floor means contamination derating — not the C rating alone — governs adjusted life in dusty gearboxes. Heat the inner ring to max 120 °C for the 160 mm interference fit and support the ring face square during fitting; cocking over a keyway brinells the raceway before first rotation.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 160 mm bore, oil-lubricated arrangements toward 2,400 r/min need positive flow and drain design; the 21600 g NJ2232 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
• The 80 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 160 mm inner ring.
• Never press either ring through the roller complement when fitting: mounting force goes through the ring faces, or the 290 mm race brinells and releases as vibration within hours.
• Minimum radial load is frequently missed in oversized motor and fan selections: an underloaded NJ2232 skids at 2,100 r/min and fails by smearing long before L10 fatigue.
• Never press either ring through the roller complement when fitting: mounting force goes through the ring faces, or the 290 mm race brinells and releases as vibration within hours.
• The 700/940 kN ratings, 90 kN Pu and 21600 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NJ2232 (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.