N411 bearing: complete specifications & equivalents
The N411 is a ISO 15 radial bearing sized 55 x 140 x 33 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 55 mm |
| Outer diameter D | 140 mm |
| Width B | 33 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 154 kN |
| Basic static load rating C0 | 138 kN |
| Fatigue load limit Pu | 16.9 kN |
| Limiting speed (mechanical) | 4300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2420 g |
| Manufacturer designation | NTN N411 |
| 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 & N400-series range
| Bore d | 2.165 in |
|---|---|
| Outer diameter D | 5.512 in |
| Width B | 1.299 in |
| ISO bore code | 11 |
| Radial section height (D−d)/2 | 42.5 mm |
| Smallest bore in N400-series | 25 mm |
| Largest outer diameter in N400-series | 200 mm |
| Width range across N400-series | 21–48 mm |
| Bore position in N400-series (smallest first) | 7 of 12 |
| Bore above smallest N400-series size | 30 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| N411 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier. |
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 N411 model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, N411 appears as a 55 mm bore single-row cylindrical roller bearing (154 kN C / 138 kN C0) with a pressed sheet-steel cage, listed to the ISO 15 boundary plan. On the NTN nameplate N states which ring carries the ribs, which determines whether N411 floats or locates; the numeric remainder is the ISO 15 series and 55 mm bore reference, not a fit or clearance instruction. At 5,000 r/min with oil versus 4,300 r/min with grease (a 700 r/min band), lubrication choice for N411 is a thermal decision, not just a sealing one. The 55 mm (2.165 in) bore and 140 mm (5.512 in) OD are ISO 15 boundary values; fillet and shoulder dimensions must still come from the NTN mounting table for the 33 mm-wide ring. Keep the open bearing wrapped until fitting: the line-contact raceways of the 55 mm bore indent under a single hard particle, and the steel cage provides no sealing of its own.
Typical equipment & failure modes
Common applications
- pump and compressor crankshafts and rotors
- machine-tool gearbox and spindle radial sets
- material-handling drum and wheel shafts
- papermaking and printing auxiliary drives
Known failure patterns
- roller smearing (microwelding) at start-up before the oil film builds under insufficient radial load
- cage wear accelerated when the EA high-capacity roller complement runs continuously above its thermal balance
- micro-pitting when the EHL film falls below the composite roughness at high specific load
- rolling-contact fatigue after the catalogue L10 life is exceeded
- fretting corrosion on a loose rotating shaft seat
Selection pitfalls — read before you substitute
- On this 55 mm bore, shaft thermal growth can preload the inner ring if the fit is too tight; verify residual interference at temperature and confirm the float ring still slides after mounting N411.
- The 42.5 mm section at 55 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 33 mm-wide cavity.
- Minimum radial load is frequently missed in oversized motor and fan selections: an underloaded N411 skids at 4,300 r/min and fails by smearing long before L10 fatigue.
- The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 154/138 kN pair here belongs to N411 as printed, not to the bare size.
- Grease limiting speed 4,300 r/min and oil 5,000 r/min are different limits for N411: the first is the cage/lubricant mechanical ceiling, the second assumes real oil flow rather than an oil bath.
- The 154/138 kN ratings, 16.9 kN Pu and 2420 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for N411 (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 N411?
N411 is an NTN N single-row cylindrical roller bearing to ISO 15: 55 mm bore, 140 mm OD and 33 mm width (2.165 × 5.512 × 1.299 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 154 kN, C0 138 kN, Pu 16.9 kN, grease limiting speed 4,300 r/min, oil 5,000 r/min, mass about 2420 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. N411 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. N411 is supplied in the standard open execution shown in the table.
Can N411 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 N411?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 77.2 mm, Ew 117.2 mm. The nominal bore/OD remain 55/140 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 4,300 r/min grease / 5,000 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.