NF414 bearing: complete specifications & equivalents
The NF414 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 NF414 |
| 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 & NF400-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 NF400-series | 25 mm |
| Largest outer diameter in NF400-series | 200 mm |
| Width range across NF400-series | 21–48 mm |
| Bore position in NF400-series (smallest first) | 10 of 12 |
| Bore above smallest NF400-series size | 45 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NF414 | 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 NF414 model number is decoded
NF414 is an NTN NF cylindrical roller bearing: one integral rib on each ring — separable inner ring with single-direction axial guidance and a defined shaft position, inside the 70×180×42 mm ISO 15 envelope. Reading the code: NF for the rib-on-each-ring type, then the ISO 15 diameter/width series and the bore code — ×5 = 70 mm (00–03 use the 10/12/15/17 exception table). NTN prints two speed ceilings: 3,400 r/min grease and 4,000 r/min oil — the pressed-steel cage and lubricant film set the real limit at the 70 mm bore. The 3.6 kN-per-mm-bore figure (253 kN over 70 mm) lets a NF414 interchange candidate be screened quickly against the same-envelope ball or roller alternatives. Provide axial location with an adjacent locating bearing rather than expecting the float cylindrical set to hold thrust on the 70 mm shaft.
Typical equipment & failure modes
Common applications
- marine gearbox and deck-machinery shafts
- large electric-motor and generator rotors
- cement and mining conveyor drive pulleys
- heavy industrial gearbox and reducer shafts
Known failure patterns
- inner-ring raceway spalling from overload in the line-contact Hertzian zone
- pressed-steel cage pocket wear when rollers skid at light load or too-thin lubricant
- micro-pitting when the EHL film falls below the composite roughness at high specific load
- fretting corrosion on a loose rotating shaft seat
- hard-particle indentation of raceways in unfiltered oil or open arrangements
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.
- The NF rib arrangement is not interchangeable with another prefix on the same 70 mm seat: one rib on each ring. Swapping NU for NJ changes axial location behaviour even though the 180×42 mm envelope matches.
- Open NF414 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.
- Wide (22/23) and light (10/49) executions at 70 mm bore share bore but not OD/width; check the full NF400 series code before substituting, because housing and shoulder geometry will not interchange.
- If the shaft must be located both ways, do not use NF414 alone: pair it with a locating bearing or specify the NUP execution with the matching loose rib ring from the 2203E table.
- The 253/236 kN ratings, 26.8 kN Pu and 5100 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NF414 (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 NF414?
NF414 is an NTN NF 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. NF414 is one integral rib on each ring — separable inner ring with single-direction axial guidance and a defined shaft position.
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. NF414 is supplied in the standard open execution shown in the table.
Can NF414 take axial load and locate a shaft?
the NF design gives one-direction axial guidance via its single outer-ring rib. The loose rib ring still only suits light/short-duration axial guidance; heavy thrust belongs to a dedicated thrust bearing.
What do Fw and Ew mean for NF414?
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.