NU240 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 NU240 model number is decoded

NU240 belongs to the NTN cylindrical roller range in NTN Ball and Roller Bearings CAT.No.2203E: line-contact rollers between ground raceways for a 690 kN dynamic rating in the 200 mm bore. Numbering ties NU240 to its envelope: type code NU, series NU200, 200 mm bore; the 360×58 mm outline therefore swaps dimensionally with other ISO 15 bearings of the same code, though rib arrangements differ by prefix. Minimum radial load matters: an unloaded NU240 at high speed skids its rollers and smears the raceway; spring preload or the rotor weight typically covers the requirement in motors and pumps. Equivalent-load planning treats NU240 as a pure radial bearing: keep P below 690 kN at the required L10, and let a paired angular-contact or thrust part carry any sustained axial component. 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 NU240.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 200 mm bore, oil-lubricated arrangements toward 2,100 r/min need positive flow and drain design; the 24800 g NU240 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 200 mm seat: outer ring ribbed, inner ring ribless. Swapping NU for NJ changes axial location behaviour even though the 360×58 mm envelope matches.
• The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 690/865 kN pair here belongs to NU240 as printed, not to the bare size.
• The 58 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 200 mm inner ring.
• Do not replace NU240 with a deep-groove ball bearing on rating alone: line contact gives 690 kN radial capacity but the bearing cannot carry the thrust duty a ball bearing can and misalignment tolerance is only 3–4 arc-minutes.
• The 690/865 kN ratings, 77.5 kN Pu and 24800 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NU240 (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.