NJ1092 bearing: complete specifications & equivalents
The NJ1092 is a ISO 15 radial bearing sized 460 x 680 x 100 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 460 mm |
| Outer diameter D | 680 mm |
| Width B | 100 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 1710 kN |
| Basic static load rating C0 | 2630 kN |
| Fatigue load limit Pu | 191 kN |
| Limiting speed (mechanical) | 850 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 120000 g |
| Manufacturer designation | NTN NJ1092 |
| 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 & NJ1000-series range
| Bore d | 18.11 in |
|---|---|
| Outer diameter D | 26.772 in |
| Width B | 3.937 in |
| ISO bore code | 92 |
| Radial section height (D−d)/2 | 110 mm |
| Smallest bore in NJ1000-series | 25 mm |
| Largest outer diameter in NJ1000-series | 720 mm |
| Width range across NJ1000-series | 12–100 mm |
| Bore position in NJ1000-series (smallest first) | 40 of 42 |
| Bore above smallest NJ1000-series size | 435 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NJ1092 | 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 NJ1092 model number is decoded
The NTN order number NJ1092 denotes a 460×680×100 mm (18.11 × 26.772 × 3.937 in) cylindrical roller bearing in the NJ1000 family, a pressed sheet-steel cage. Digit by digit, NJ1092 reads as NJ (inner ring two ribs + one outer rib), ISO 15 series, and bore 460 mm; trailing letters such as EA or E mark the cage/capacity execution and are part of the order number. NTN prints two speed ceilings: 850 r/min grease and 1,000 r/min oil — the pressed-steel cage and lubricant film set the real limit at the 460 mm bore. With the inner ring rotating, catalogue practice is a m6/n6 shaft seat and an H7/H6 housing; the outer ring must remain free to creep slightly axially in non-locating NJ arrangements. Mount the separable inner ring + roller assembly on the shaft first and slide the outer ring into the housing; never press the outer ring through the rollers of NJ1092.
Typical equipment & failure modes
Common applications
- large turbine and generator rotor bearings
- wind-turbine gearbox planet and rotor shafts
- ship propulsion line shafts and reduction gears
- mining SAG/ball-mill drive shafts
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
- micro-pitting when the EHL film falls below the composite roughness at high specific load
- fretting corrosion on a loose rotating shaft seat
- false brinelling on standby machines exposed to external vibration
Selection pitfalls — read before you substitute
- At 460 mm bore, oil-lubricated arrangements toward 1,000 r/min need positive flow and drain design; the 120000 g NJ1092 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
- The NJ rib arrangement is not interchangeable with another prefix on the same 460 mm seat: inner ring two ribs + one outer rib. Swapping NU for NJ changes axial location behaviour even though the 680×100 mm envelope matches.
- Do not replace NJ1092 with a deep-groove ball bearing on rating alone: line contact gives 1710 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 EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 1710/2630 kN pair here belongs to NJ1092 as printed, not to the bare size.
- If the shaft must be located both ways, do not use NJ1092 alone: pair it with a locating bearing or specify the NUP execution with the matching loose rib ring from the 2203E table.
- The 1710/2630 kN ratings, 191 kN Pu and 120000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NJ1092 (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 NJ1092?
NJ1092 is an NTN NJ single-row cylindrical roller bearing to ISO 15: 460 mm bore, 680 mm OD and 100 mm width (18.11 × 26.772 × 3.937 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 1710 kN, C0 2630 kN, Pu 191 kN, grease limiting speed 850 r/min, oil 1,000 r/min, mass about 120000 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. NJ1092 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. NJ1092 is supplied in the standard open execution shown in the table.
Can NJ1092 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 NJ1092?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 516 mm, Ew 624 mm. The nominal bore/OD remain 460/680 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 850 r/min grease / 1,000 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.