NU2252 bearing: complete specifications & equivalents
The NU2252 is a ISO 15 radial bearing sized 260 x 480 x 130 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 | 480 mm |
| Width B | 130 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 1980 kN |
| Basic static load rating C0 | 2930 kN |
| Fatigue load limit Pu | 241 kN |
| Limiting speed (mechanical) | 1200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 102000 g |
| Manufacturer designation | NTN NU2252 |
| 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 & NU2200-series range
| Bore d | 10.236 in |
|---|---|
| Outer diameter D | 18.898 in |
| Width B | 5.118 in |
| ISO bore code | 52 |
| Radial section height (D−d)/2 | 110 mm |
| Smallest bore in NU2200-series | 17 mm |
| Largest outer diameter in NU2200-series | 1030 mm |
| Width range across NU2200-series | 16–272 mm |
| Bore position in NU2200-series (smallest first) | 31 of 39 |
| Bore above smallest NU2200-series size | 243 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NU2252-MA | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 260×480×130 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
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 NU2252 model number is decoded
The NTN order number NU2252 denotes a 260×480×130 mm (10.236 × 18.898 × 5.118 in) cylindrical roller bearing in the NU2200 family, a pressed sheet-steel cage. Numbering ties NU2252 to its envelope: type code NU, series NU2200, 260 mm bore; the 480×130 mm outline therefore swaps dimensionally with other ISO 15 bearings of the same code, though rib arrangements differ by prefix. The 110.0 mm radial section ((480−260)/2) frames the roller complement; capacity per millimetre of bore is about 7.6 kN/mm before application factors. Thermal planning around the 1,200 r/min grease ceiling should include the cage type (a pressed sheet-steel cage) and oil-flow option to 1,400 r/min for continuously high-duty 260 mm positions. Provide axial location with an adjacent locating bearing rather than expecting the float cylindrical set to hold thrust on the 260 mm shaft.
Typical equipment & failure modes
Common applications
- wind-turbine gearbox planet and rotor shafts
- ship propulsion line shafts and reduction gears
- mining SAG/ball-mill drive shafts
- offshore drawworks and winch drums
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
- micro-pitting when the EHL film falls below the composite roughness at high specific load
- brinelling from static overload or impact during handling
- false brinelling on standby machines exposed to external vibration
Selection pitfalls — read before you substitute
- At 260 mm bore, oil-lubricated arrangements toward 1,400 r/min need positive flow and drain design; the 102000 g NU2252 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
- Grease limiting speed 1,200 r/min and oil 1,400 r/min are different limits for NU2252: the first is the cage/lubricant mechanical ceiling, the second assumes real oil flow rather than an oil bath.
- Grease limiting speed 1,200 r/min and oil 1,400 r/min are different limits for NU2252: the first is the cage/lubricant mechanical ceiling, the second assumes real oil flow rather than an oil bath.
- Wide (22/23) and light (10/49) executions at 260 mm bore share bore but not OD/width; check the full NU2200 series code before substituting, because housing and shoulder geometry will not interchange.
- The 110.0 mm section at 260 mm bore leaves a narrow oil path; with the standard cage the relubrication groove and oil-level design must keep grease from churning in the 130 mm-wide cavity.
- The 1980/2930 kN ratings, 241 kN Pu and 102000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NU2252 (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 NU2252?
NU2252 is an NTN NU single-row cylindrical roller bearing to ISO 15: 260 mm bore, 480 mm OD and 130 mm width (10.236 × 18.898 × 5.118 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 1980 kN, C0 2930 kN, Pu 241 kN, grease limiting speed 1,200 r/min, oil 1,400 r/min, mass about 102000 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. NU2252 is two integral ribs on the outer ring and a ribless, separable inner ring — a non-locating bearing that lets the shaft float axially.
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. NU2252 is supplied in the standard open execution shown in the table.
Can NU2252 take axial load and locate a shaft?
the NU design carries no axial load and floats axially on both sides. Provide axial location with an adjacent locating bearing (angular-contact, deep-groove or a paired NJ/NUP set).
What do Fw and Ew mean for NU2252?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 320 mm, Ew 420 mm. The nominal bore/OD remain 260/480 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 1,200 r/min grease / 1,400 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.