NUP2352 bearing: complete specifications & equivalents
The NUP2352 is a ISO 15 radial bearing sized 260 x 540 x 165 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 260 mm |
| Outer diameter D | 540 mm |
| Width B | 165 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 2600 kN |
| Basic static load rating C0 | 3600 kN |
| Fatigue load limit Pu | 289 kN |
| Limiting speed (mechanical) | 1000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 178000 g |
| Manufacturer designation | NTN NUP2352 |
| Standard | ISO 15 |
| Catalog version | NTN Ball and Roller Bearings CAT.No.2203E |
| Last verified | 2026-10-01 |
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.
Dimensions in inches & NUP2300-series range
| Bore d | 10.236 in |
|---|---|
| Outer diameter D | 21.26 in |
| Width B | 6.496 in |
| ISO bore code | 52 |
| Radial section height (D−d)/2 | 140 mm |
| Smallest bore in NUP2300-series | 20 mm |
| Largest outer diameter in NUP2300-series | 580 mm |
| Width range across NUP2300-series | 21–175 mm |
| Bore position in NUP2300-series (smallest first) | 30 of 31 |
| Bore above smallest NUP2300-series size | 240 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NUP2352 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; brand-specific OEM equivalents (NSK/FAG/NTN) pending multi-source data. |
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 NUP2352 model number is decoded
NTN lists NUP2352 on the 260×540 mm envelope, 165 mm wide: a line-contact radial bearing with a pressed sheet-steel cage and a grease limiting speed of 1,000 r/min. On the NTN nameplate NUP states which ring carries the ribs, which determines whether NUP2352 floats or locates; the numeric remainder is the ISO 15 series and 260 mm bore reference, not a fit or clearance instruction. NTN prints the raceway diameters for this size — Fw 336 mm and Ew 464 mm — the envelope inside the 260/540 mm bore/OD where the rollers actually run. Thermal planning around the 1,000 r/min grease ceiling should include the cage type (a pressed sheet-steel cage) and oil-flow option to 1,200 r/min for continuously high-duty 260 mm positions. Heat the inner ring to max 120 °C for the 260 mm interference fit and support the ring face square during fitting; cocking over a keyway brinells the raceway before first rotation.
Typical equipment & failure modes
Common applications
- heavy press and large gearbox main shafts
- rolling-mill work-roll and backup-roll positions
- large turbine and generator rotor bearings
- wind-turbine gearbox planet and rotor shafts
Known failure patterns
- inner-ring raceway spalling from overload in the line-contact Hertzian zone
- pressed-steel cage pocket wear when rollers skid at light load or too-thin lubricant
- roller-end and raceway scoring from inadequate oil flow under heavy radial load
- electrical pitting on VFD-driven motor shafts without grounding protection
- edge loading from shaft deflection beyond the 3–4 arc-minute alignment limit
Selection pitfalls — read before you substitute
- At 260 mm bore, oil-lubricated arrangements toward 1,200 r/min need positive flow and drain design; the 178000 g NUP2352 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
- Open NUP2352 units need application-supplied sealing and a defined lubricant schedule; film thickness is the first failure mode for line contact when viscosity drops at the 260 mm contact.
- Wide (22/23) and light (10/49) executions at 260 mm bore share bore but not OD/width; check the full NUP2300 series code before substituting, because housing and shoulder geometry will not interchange.
- Grease limiting speed 1,000 r/min and oil 1,200 r/min are different limits for NUP2352: the first is the cage/lubricant mechanical ceiling, the second assumes real oil flow rather than an oil bath.
- The NUP rib arrangement is not interchangeable with another prefix on the same 260 mm seat: inner ring two ribs + loose L-ring. Swapping NU for NJ changes axial location behaviour even though the 540×165 mm envelope matches.
- The 2600/3600 kN ratings, 289 kN Pu and 178000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NUP2352 (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.
Frequently asked questions
What are the dimensions and catalogue data of NUP2352?
NUP2352 is an NTN NUP single-row cylindrical roller bearing to ISO 15: 260 mm bore, 540 mm OD and 165 mm width (10.236 × 21.26 × 6.496 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 2600 kN, C0 3600 kN, Pu 289 kN, grease limiting speed 1,000 r/min, oil 1,200 r/min, mass about 178000 g. It is open, with a pressed sheet-steel cage.
What is the difference between NU, NJ, NUP, N and NF cylindrical roller bearings?
The prefix states the rib arrangement: NU has two outer-ring ribs and a ribless inner ring (float, no axial load); NJ adds ribs for one-direction location; NUP adds a loose L-ring to locate both directions; N has two inner-ring ribs and a separable outer ring; NF has one rib per ring for one-direction guidance. NUP2352 is the NJ rib arrangement plus a loose L-shaped rib ring on the inner ring — it locates the shaft in both axial directions.
What do the EA, E and ＊ suffixes mean on NTN cylindrical roller bearings?
EA is NTN's high-capacity design with a pressed sheet-steel cage and optimised roller complement in the same ISO 15 envelope; E marks the high-capacity design at the larger bores; the ＊ symbol printed before the code in the NTN catalogue marks the ULTAGE new-generation specification and is not typed as part of the order number. NUP2352 is supplied in the standard open execution shown in the table.
Can NUP2352 take axial load and locate a shaft?
the NUP design provides two-direction axial location via its loose rib ring, for light/moderate thrust guidance. The loose rib ring still only suits light/short-duration axial guidance; heavy thrust belongs to a dedicated thrust bearing.
What do Fw and Ew mean for NUP2352?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 336 mm, Ew 464 mm. The nominal bore/OD remain 260/540 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 1,000 r/min grease / 1,200 r/min oil.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN Ball and Roller Bearings CAT.No.2203E on 2026-10-01. Read our editorial & correction policy.