N2260 bearing: complete specifications & equivalents
The N2260 is a ISO 15 radial bearing sized 300 x 540 x 140 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 300 mm |
| Outer diameter D | 540 mm |
| Width B | 140 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 2420 kN |
| Basic static load rating C0 | 3650 kN |
| Fatigue load limit Pu | 290 kN |
| Limiting speed (mechanical) | 1000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 135000 g |
| Manufacturer designation | NTN N2260 |
| 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 & N2200-series range
| Bore d | 11.811 in |
|---|---|
| Outer diameter D | 21.26 in |
| Width B | 5.512 in |
| ISO bore code | 60 |
| Radial section height (D−d)/2 | 120 mm |
| Smallest bore in N2200-series | 20 mm |
| Largest outer diameter in N2200-series | 580 mm |
| Width range across N2200-series | 18–150 mm |
| Bore position in N2200-series (smallest first) | 32 of 33 |
| Bore above smallest N2200-series size | 280 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| N2260 | 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 N2260 model number is decoded
The NTN order number N2260 denotes a 300×540×140 mm (11.811 × 21.26 × 5.512 in) cylindrical roller bearing in the N2200 family, a pressed sheet-steel cage. Digit by digit, N2260 reads as N (inner ring ribbed, outer ring ribless), ISO 15 series, and bore 300 mm; trailing letters such as EA or E mark the cage/capacity execution and are part of the order number. The separable ring comes off without removing the roller assembly from the other ring, which eases inspection and lets the non-locating arrangement accommodate thermal shaft growth. Selection arithmetic: Pu 290 kN is the fatigue load limit feeding the adjusted-life equation, and the C0/C ratio of 1.51 (3650/2420 kN) shows the high-static-capacity proportioning of this 300 mm bore. After mounting verify the outer ring slides axially by hand at ambient temperature; a stuck float ring in a N2260 non-locating position preloads the bearing when the shaft grows.
Typical equipment & failure modes
Common applications
- mining SAG/ball-mill drive shafts
- offshore drawworks and winch drums
- heavy press and large gearbox main shafts
- rolling-mill work-roll and backup-roll positions
Known failure patterns
- roller smearing (microwelding) at start-up before the oil film builds under insufficient radial load
- pressed-steel cage pocket wear when rollers skid at light load or too-thin lubricant
- grease starvation and cage drag when relubrication intervals are extended past the grease life
- false brinelling on standby machines exposed to external vibration
- hard-particle indentation of raceways in unfiltered oil or open arrangements
Selection pitfalls — read before you substitute
- At 300 mm bore, oil-lubricated arrangements toward 1,200 r/min need positive flow and drain design; the 135000 g N2260 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 2420/3650 kN pair here belongs to N2260 as printed, not to the bare size.
- Do not replace N2260 with a deep-groove ball bearing on rating alone: line contact gives 2420 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 120.0 mm section at 300 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 140 mm-wide cavity.
- The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 2420/3650 kN pair here belongs to N2260 as printed, not to the bare size.
- The 2420/3650 kN ratings, 290 kN Pu and 135000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for N2260 (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 N2260?
N2260 is an NTN N single-row cylindrical roller bearing to ISO 15: 300 mm bore, 540 mm OD and 140 mm width (11.811 × 21.26 × 5.512 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 2420 kN, C0 3650 kN, Pu 290 kN, grease limiting speed 1,000 r/min, oil 1,200 r/min, mass about 135000 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. N2260 is two integral ribs on the inner ring and a ribless separable outer ring — equivalent float behaviour with the separable ring on the housing side.
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. N2260 is supplied in the standard open execution shown in the table.
Can N2260 take axial load and locate a shaft?
the N design is non-locating like NU but floats with the separable outer ring in the housing. 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 N2260?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 364 mm, Ew 476 mm. The nominal bore/OD remain 300/540 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 1,000 r/min grease / 1,200 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.