N414 bearing: complete specifications & equivalents
The N414 is a ISO 15 radial bearing sized 70 x 180 x 42 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 70 mm |
| Outer diameter D | 180 mm |
| Width B | 42 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 253 kN |
| Basic static load rating C0 | 236 kN |
| Fatigue load limit Pu | 26.8 kN |
| Limiting speed (mechanical) | 3400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 5100 g |
| Manufacturer designation | NTN N414 |
| 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 | 2.756 in |
|---|---|
| Outer diameter D | 7.087 in |
| Width B | 1.654 in |
| ISO bore code | 14 |
| Radial section height (D−d)/2 | 55 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) | 10 of 12 |
| Bore above smallest N400-series size | 45 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| N414 | 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 N414 model number is decoded
For pure radial duty on a 70 mm shaft NTN supplies N414: two integral ribs on the inner ring and a ribless separable outer ring; the open execution is rated 3,400 r/min on grease and 4,000 r/min on oil. The leading N defines the rib arrangement (inner ring ribbed, outer ring ribless); the dimension-series digits and the two-digit bore code resolve to 70 mm, with 180 mm OD and 42 mm width from the ISO 15 general plan. The 42 mm width and 55.0 mm section put the N400 series in the heavy (04) section; wide 22/23 variants at the same bore change OD, width and heat generation and are not drop-in swaps. Selection arithmetic: Pu 26.8 kN is the fatigue load limit feeding the adjusted-life equation, and the C0/C ratio of 0.93 (236/253 kN) shows the high-static-capacity proportioning of this 70 mm bore. 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 N414.
Typical equipment & failure modes
Common applications
- large pump, turbine and compressor rotors
- rolling-mill auxiliary drive shafts
- crusher and vibrating-screen drive shafts
- marine gearbox and deck-machinery shafts
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
- micro-pitting when the EHL film falls below the composite roughness at high specific load
- edge loading from shaft deflection beyond the 3–4 arc-minute alignment limit
- rolling-contact fatigue after the catalogue L10 life is exceeded
Selection pitfalls — read before you substitute
- Induction-heat the 70 mm inner ring (max 120 °C) and mount it before fitting the outer ring; the ring mass makes square guidance essential — driving through the rollers brinells the 180 mm raceway.
- Grease limiting speed 3,400 r/min and oil 4,000 r/min are different limits for N414: the first is the cage/lubricant mechanical ceiling, the second assumes real oil flow rather than an oil bath.
- The N rib arrangement is not interchangeable with another prefix on the same 70 mm seat: inner ring ribbed, outer ring ribless. Swapping NU for NJ changes axial location behaviour even though the 180×42 mm envelope matches.
- Grease limiting speed 3,400 r/min and oil 4,000 r/min are different limits for N414: the first is the cage/lubricant mechanical ceiling, the second assumes real oil flow rather than an oil bath.
- Open N414 units need application-supplied sealing and a defined lubricant schedule; film thickness is the first failure mode for line contact when viscosity drops at the 70 mm contact.
- The 253/236 kN ratings, 26.8 kN Pu and 5100 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for N414 (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 N414?
N414 is an NTN N single-row cylindrical roller bearing to ISO 15: 70 mm bore, 180 mm OD and 42 mm width (2.756 × 7.087 × 1.654 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 253 kN, C0 236 kN, Pu 26.8 kN, grease limiting speed 3,400 r/min, oil 4,000 r/min, mass about 5100 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. N414 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. N414 is supplied in the standard open execution shown in the table.
Can N414 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 N414?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 100 mm, Ew 152 mm. The nominal bore/OD remain 70/180 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 3,400 r/min grease / 4,000 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.