NU2344 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 NU2344 model number is decoded

NU2344 belongs to the NTN cylindrical roller range in NTN Ball and Roller Bearings CAT.No.2203E: line-contact rollers between ground raceways for a 1970 kN dynamic rating in the 220 mm bore. On the NTN nameplate NU states which ring carries the ribs, which determines whether NU2344 floats or locates; the numeric remainder is the ISO 15 series and 220 mm bore reference, not a fit or clearance instruction. NTN prints two speed ceilings: 1,200 r/min grease and 1,400 r/min oil — the pressed-steel cage and lubricant film set the real limit at the 220 mm bore. Rating life at 1970 kN C assumes clean oil and adequate film; the 222 kN Pu floor means contamination derating — not the C rating alone — governs adjusted life in dusty gearboxes. Housing and shaft fillets must clear the ring chamfers of NU2344; an oversized radius locks the ring on its face and tilts the 145 mm-wide seat.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 220 mm bore, oil-lubricated arrangements toward 1,400 r/min need positive flow and drain design; the 114000 g NU2344 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
• The NU rib arrangement is not interchangeable with another prefix on the same 220 mm seat: outer ring ribbed, inner ring ribless. Swapping NU for NJ changes axial location behaviour even though the 460×145 mm envelope matches.
• The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 1970/2620 kN pair here belongs to NU2344 as printed, not to the bare size.
• The NU rib arrangement is not interchangeable with another prefix on the same 220 mm seat: outer ring ribbed, inner ring ribless. Swapping NU for NJ changes axial location behaviour even though the 460×145 mm envelope matches.
• If the shaft must be located both ways, do not use NU2344 alone: pair it with a locating bearing or specify the NUP execution with the matching loose rib ring from the 2203E table.
• The 1970/2620 kN ratings, 222 kN Pu and 114000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NU2344 (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.