NJ2230 bearing: complete specifications & equivalents
The NJ2230 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 NJ2230 |
| 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 & NJ2200-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 NJ2200-series | 17 mm |
| Largest outer diameter in NJ2200-series | 580 mm |
| Width range across NJ2200-series | 16–150 mm |
| Bore position in NJ2200-series (smallest first) | 23 of 34 |
| Bore above smallest NJ2200-series size | 133 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NJ2230-ECM | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 150×270×73 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 NJ2230 model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, NJ2230 appears as a 150 mm bore single-row cylindrical roller bearing (555 kN C / 710 kN C0) with a pressed sheet-steel cage, listed to the ISO 15 boundary plan. Numbering ties NJ2230 to its envelope: type code NJ, series NJ2200, 150 mm bore; the 270×73 mm outline therefore swaps dimensionally with other ISO 15 bearings of the same code, though rib arrangements differ by prefix. NTN prints the raceway diameters for this size — Fw 182 mm and Ew 238 mm — the envelope inside the 150/270 mm bore/OD where the rollers actually run. The 3.7 kN-per-mm-bore figure (555 kN over 150 mm) lets a NJ2230 interchange candidate be screened quickly against the same-envelope ball or roller alternatives. After mounting verify the outer ring slides axially by hand at ambient temperature; a stuck float ring in a NJ2230 non-locating position preloads the bearing when the shaft grows.
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
- 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
- brinelling from static overload or impact during handling
- edge loading from shaft deflection beyond the 3–4 arc-minute alignment limit
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 NJ2230 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
- The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 555/710 kN pair here belongs to NJ2230 as printed, not to the bare size.
- Do not replace NJ2230 with a deep-groove ball bearing on rating alone: line contact gives 555 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 73 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 150 mm inner ring.
- The NJ rib arrangement is not interchangeable with another prefix on the same 150 mm seat: inner ring two ribs + one outer rib. Swapping NU for NJ changes axial location behaviour even though the 270×73 mm envelope matches.
- The 555/710 kN ratings, 69.5 kN Pu and 16000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NJ2230 (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 NJ2230?
NJ2230 is an NTN NJ 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. NJ2230 is two integral ribs on the inner ring and one rib on the outer ring — it locates the shaft in one axial direction.
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. NJ2230 is supplied in the standard open execution shown in the table.
Can NJ2230 take axial load and locate a shaft?
the NJ design accepts axial load in one direction and provides one-way shaft location. For two-direction location use an NUP execution or an NJ pair with loose rib rings.
What do Fw and Ew mean for NJ2230?
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.