N2356 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 N2356 model number is decoded

N2356 is the extra-wide (23) section of the NTN N2300 dimension series for a 280 mm shaft — 3000 kN of basic dynamic capacity in a 218000 g, open bearing. On the NTN nameplate N states which ring carries the ribs, which determines whether N2356 floats or locates; the numeric remainder is the ISO 15 series and 280 mm bore reference, not a fit or clearance instruction. Line contact between rollers and raceways gives N2356 high radial capacity but no tolerance for misalignment: beyond roughly 3–4 arc-minutes the roller ends edge-load and fatigue accelerates. Rating life at 3000 kN C assumes clean oil and adequate film; the 335 kN Pu floor means contamination derating — not the C rating alone — governs adjusted life in dusty gearboxes. After mounting verify the outer ring slides axially by hand at ambient temperature; a stuck float ring in a N2356 non-locating position preloads the bearing when the shaft grows.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 280 mm bore, oil-lubricated arrangements toward 1,100 r/min need positive flow and drain design; the 218000 g N2356 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
• The N rib arrangement is not interchangeable with another prefix on the same 280 mm seat: inner ring ribbed, outer ring ribless. Swapping NU for NJ changes axial location behaviour even though the 580×175 mm envelope matches.
• The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 3000/4250 kN pair here belongs to N2356 as printed, not to the bare size.
• Wide (22/23) and light (10/49) executions at 280 mm bore share bore but not OD/width; check the full N2300 series code before substituting, because housing and shoulder geometry will not interchange.
• Wide (22/23) and light (10/49) executions at 280 mm bore share bore but not OD/width; check the full N2300 series code before substituting, because housing and shoulder geometry will not interchange.
• The 3000/4250 kN ratings, 335 kN Pu and 218000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for N2356 (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.