N2248 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 N2248 model number is decoded

N2248 is an NTN N cylindrical roller bearing: two integral ribs on the inner ring and a ribless separable outer ring — equivalent float behaviour with the separable ring on the housing side, inside the 240×440×120 mm ISO 15 envelope. 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 240 mm, with 440 mm OD and 120 mm width from the ISO 15 general plan. With C 1590 kN and C0 2320 kN (C0/C ≈ 1.46) the bearing is proportioned for heavy radial load; the N design is non-locating like NU but floats with the separable outer ring in the housing. Selection arithmetic: Pu 196 kN is the fatigue load limit feeding the adjusted-life equation, and the C0/C ratio of 1.46 (2320/1590 kN) shows the high-static-capacity proportioning of this 240 mm bore. Keep the open bearing wrapped until fitting: the line-contact raceways of the 240 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

• At 240 mm bore, oil-lubricated arrangements toward 1,600 r/min need positive flow and drain design; the 78400 g N2248 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
• The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 1590/2320 kN pair here belongs to N2248 as printed, not to the bare size.
• The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 1590/2320 kN pair here belongs to N2248 as printed, not to the bare size.
• If the shaft must be located both ways, do not use N2248 alone: pair it with a locating bearing or specify the NUP execution with the matching loose rib ring from the 2203E table.
• Minimum radial load is frequently missed in oversized motor and fan selections: an underloaded N2248 skids at 1,300 r/min and fails by smearing long before L10 fatigue.
• The 1590/2320 kN ratings, 196 kN Pu and 78400 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for N2248 (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.