NN3032 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 NN3032 model number is decoded

For pure radial duty on a 160 mm shaft NTN supplies NN3032: two integral ribs on the outer ring and a ribless, separable inner ring; the open execution is rated 2,500 r/min on grease and 2,900 r/min on oil. The leading NN defines the rib arrangement (double row, ribbed inner ring, separable outer); the dimension-series digits and the two-digit bore code resolve to 160 mm, with 240 mm OD and 60 mm width from the ISO 15 general plan. The roller-set pitch sits inside the 40.0 mm radial section between the 160 mm bore and 240 mm OD; NTN prints Fw/Ew raceway diameters only for selected executions. Selection arithmetic: Pu 65.5 kN is the fatigue load limit feeding the adjusted-life equation, and the C0/C ratio of 1.59 (660/415 kN) shows the high-static-capacity proportioning of this 160 mm bore. Mount the separable inner ring + roller assembly on the shaft first and slide the outer ring into the housing; never press the outer ring through the rollers of NN3032.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 160 mm bore, oil-lubricated arrangements toward 2,900 r/min need positive flow and drain design; the 8920 g NN3032 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
• Do not replace NN3032 with a deep-groove ball bearing on rating alone: line contact gives 415 kN radial capacity but the bearing cannot carry the thrust duty a ball bearing can and misalignment tolerance is only 3–4 arc-minutes.
• Never press either ring through the roller complement when fitting: mounting force goes through the ring faces, or the 240 mm race brinells and releases as vibration within hours.
• The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 415/660 kN pair here belongs to NN3032 as printed, not to the bare size.
• The NN rib arrangement is not interchangeable with another prefix on the same 160 mm seat: double row, ribbed inner ring, separable outer. Swapping NU for NJ changes axial location behaviour even though the 240×60 mm envelope matches.
• The 415/660 kN ratings, 65.5 kN Pu and 8920 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NN3032 (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.