NUP2336 bearing: complete specifications & equivalents
The NUP2336 is a ISO 15 radial bearing sized 180 x 380 x 126 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 180 mm |
| Outer diameter D | 380 mm |
| Width B | 126 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 1530 kN |
| Basic static load rating C0 | 1990 kN |
| Fatigue load limit Pu | 179 kN |
| Limiting speed (mechanical) | 1500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 68100 g |
| Manufacturer designation | NTN NUP2336 |
| 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 | 7.087 in |
|---|---|
| Outer diameter D | 14.961 in |
| Width B | 4.961 in |
| ISO bore code | 36 |
| Radial section height (D−d)/2 | 100 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) | 25 of 31 |
| Bore above smallest NUP2300-series size | 160 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NUP2336 | 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 NUP2336 model number is decoded
NUP2336 is an NTN NUP cylindrical roller bearing: the NJ rib arrangement plus a loose L-shaped rib ring on the inner ring — it locates the shaft in both axial directions, inside the 180×380×126 mm ISO 15 envelope. On the NTN nameplate NUP states which ring carries the ribs, which determines whether NUP2336 floats or locates; the numeric remainder is the ISO 15 series and 180 mm bore reference, not a fit or clearance instruction. NTN prints the raceway diameters for this size — Fw 232 mm and Ew 328 mm — the envelope inside the 180/380 mm bore/OD where the rollers actually run. Rating life at 1530 kN C assumes clean oil and adequate film; the 179 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 NUP2336; an oversized radius locks the ring on its face and tilts the 126 mm-wide seat.
Typical equipment & failure modes
Common applications
- offshore drawworks and winch drums
- heavy press and large gearbox main shafts
- rolling-mill work-roll and backup-roll positions
- large turbine and generator rotor bearings
Known failure patterns
- inner-ring raceway spalling from overload in the line-contact Hertzian zone
- cage wear accelerated when the EA high-capacity roller complement runs continuously above its thermal balance
- grease starvation and cage drag when relubrication intervals are extended past the grease life
- edge loading from shaft deflection beyond the 3–4 arc-minute alignment limit
- fretting corrosion on a loose rotating shaft seat
Selection pitfalls — read before you substitute
- At 180 mm bore, oil-lubricated arrangements toward 1,800 r/min need positive flow and drain design; the 68100 g NUP2336 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
- Wide (22/23) and light (10/49) executions at 180 mm bore share bore but not OD/width; check the full NUP2300 series code before substituting, because housing and shoulder geometry will not interchange.
- Open NUP2336 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 180 mm contact.
- The NUP rib arrangement is not interchangeable with another prefix on the same 180 mm seat: inner ring two ribs + loose L-ring. Swapping NU for NJ changes axial location behaviour even though the 380×126 mm envelope matches.
- The NUP rib arrangement is not interchangeable with another prefix on the same 180 mm seat: inner ring two ribs + loose L-ring. Swapping NU for NJ changes axial location behaviour even though the 380×126 mm envelope matches.
- The 1530/1990 kN ratings, 179 kN Pu and 68100 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NUP2336 (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 NUP2336?
NUP2336 is an NTN NUP single-row cylindrical roller bearing to ISO 15: 180 mm bore, 380 mm OD and 126 mm width (7.087 × 14.961 × 4.961 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 1530 kN, C0 1990 kN, Pu 179 kN, grease limiting speed 1,500 r/min, oil 1,800 r/min, mass about 68100 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. NUP2336 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. NUP2336 is supplied in the standard open execution shown in the table.
Can NUP2336 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 NUP2336?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 232 mm, Ew 328 mm. The nominal bore/OD remain 180/380 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 1,500 r/min grease / 1,800 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.