NUP2230 bearing: complete specifications & equivalents
The NUP2230 is a ISO 15 radial bearing sized 150 x 270 x 73 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 150 mm |
| Outer diameter D | 270 mm |
| Width B | 73 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 555 kN |
| Basic static load rating C0 | 710 kN |
| Fatigue load limit Pu | 69.5 kN |
| Limiting speed (mechanical) | 2200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 16000 g |
| Manufacturer designation | NTN NUP2230 |
| 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 & NUP2200-series range
| Bore d | 5.906 in |
|---|---|
| Outer diameter D | 10.63 in |
| Width B | 2.874 in |
| ISO bore code | 30 |
| Radial section height (D−d)/2 | 60 mm |
| Smallest bore in NUP2200-series | 17 mm |
| Largest outer diameter in NUP2200-series | 580 mm |
| Width range across NUP2200-series | 16–150 mm |
| Bore position in NUP2200-series (smallest first) | 23 of 34 |
| Bore above smallest NUP2200-series size | 133 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NUP2230 | 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 NUP2230 model number is decoded
NUP2230 belongs to the NTN cylindrical roller range in NTN Ball and Roller Bearings CAT.No.2203E: line-contact rollers between ground raceways for a 555 kN dynamic rating in the 150 mm bore. On the NTN nameplate NUP states which ring carries the ribs, which determines whether NUP2230 floats or locates; the numeric remainder is the ISO 15 series and 150 mm bore reference, not a fit or clearance instruction. With C 555 kN and C0 710 kN (C0/C ≈ 1.28) the bearing is proportioned for heavy radial load; the NUP design provides two-direction axial location via its loose rib ring, for light/moderate thrust guidance. Rating life at 555 kN C assumes clean oil and adequate film; the 69.5 kN Pu floor means contamination derating — not the C rating alone — governs adjusted life in dusty gearboxes. Confirm the loose L-shaped rib ring is fitted and seated, since it is what turns the NJ-type arrangement into the two-direction-locating NUP set on the 150 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
- roller smearing (microwelding) at start-up before the oil film builds under insufficient radial load
- cage distortion after a mounting blow carried through the roller set
- roller-end and raceway scoring from inadequate oil flow under heavy radial load
- 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 150 mm bore, oil-lubricated arrangements toward 2,600 r/min need positive flow and drain design; the 16000 g NUP2230 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
- Wide (22/23) and light (10/49) executions at 150 mm bore share bore but not OD/width; check the full NUP2200 series code before substituting, because housing and shoulder geometry will not interchange.
- Grease limiting speed 2,200 r/min and oil 2,600 r/min are different limits for NUP2230: the first is the cage/lubricant mechanical ceiling, the second assumes real oil flow rather than an oil bath.
- Never press either ring through the roller complement when fitting: mounting force goes through the ring faces, or the 270 mm race brinells and releases as vibration within hours.
- Minimum radial load is frequently missed in oversized motor and fan selections: an underloaded NUP2230 skids at 2,200 r/min and fails by smearing long before L10 fatigue.
- The 555/710 kN ratings, 69.5 kN Pu and 16000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NUP2230 (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 NUP2230?
NUP2230 is an NTN NUP single-row cylindrical roller bearing to ISO 15: 150 mm bore, 270 mm OD and 73 mm width (5.906 × 10.63 × 2.874 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 555 kN, C0 710 kN, Pu 69.5 kN, grease limiting speed 2,200 r/min, oil 2,600 r/min, mass about 16000 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. NUP2230 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. NUP2230 is supplied in the standard open execution shown in the table.
Can NUP2230 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 NUP2230?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 182 mm, Ew 238 mm. The nominal bore/OD remain 150/270 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 2,200 r/min grease / 2,600 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.