NF2204EA bearing: complete specifications & equivalents
The NF2204EA is a ISO 15 radial bearing sized 20 x 47 x 18 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 20 mm |
| Outer diameter D | 47 mm |
| Width B | 18 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 38.5 kN |
| Basic static load rating C0 | 31 kN |
| Fatigue load limit Pu | 3.75 kN |
| Limiting speed (mechanical) | 14000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 144 g |
| Manufacturer designation | NTN NF2204EA |
| 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 & NF2200-series range
| Bore d | 0.787 in |
|---|---|
| Outer diameter D | 1.85 in |
| Width B | 0.709 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 13.5 mm |
| Smallest bore in NF2200-series | 20 mm |
| Largest outer diameter in NF2200-series | 170 mm |
| Width range across NF2200-series | 18–43 mm |
| Bore position in NF2200-series (smallest first) | 1 of 16 |
| Bore above smallest NF2200-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NF2204EA | 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 NF2204EA model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, NF2204EA appears as a 20 mm bore single-row cylindrical roller bearing (38.5 kN C / 31 kN C0) with the EA high-capacity pressed sheet-steel cage, listed to the ISO 15 boundary plan. Reading the code: NF for the rib-on-each-ring type, then the ISO 15 diameter/width series and the bore code — ×5 = 20 mm (00–03 use the 10/12/15/17 exception table). NTN prints the raceway diameters for this size — Fw 26.5 mm and Ew 41.5 mm — the envelope inside the 20/47 mm bore/OD where the rollers actually run. Mass 144 g for the 20×47×18 mm NF2204EA execution covers the pressed-steel cage and full roller complement; substitute on mass plus rating, not envelope alone. Provide axial location with an adjacent locating bearing rather than expecting the float cylindrical set to hold thrust on the 20 mm shaft.
Typical equipment & failure modes
Common applications
- small pump and compressor rotor shafts
- appliance and office-machine drives
- agricultural PTO and implement gear shafts
- small conveyor and fan rotor positions
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
- grease starvation and cage drag when relubrication intervals are extended past the grease life
- hard-particle indentation of raceways in unfiltered oil or open arrangements
- hard-particle indentation of raceways in unfiltered oil or open arrangements
Selection pitfalls — read before you substitute
- Small 20 mm-bore cylindrical rollers are skid-sensitive: ensure the radial load exceeds the minimum-load floor at operating speed, or the NF2204EA rollers smear even with correct grease.
- The NF rib arrangement is not interchangeable with another prefix on the same 20 mm seat: one rib on each ring. Swapping NU for NJ changes axial location behaviour even though the 47×18 mm envelope matches.
- Never press either ring through the roller complement when fitting: mounting force goes through the ring faces, or the 47 mm race brinells and releases as vibration within hours.
- The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 38.5/31 kN pair here belongs to NF2204EA as printed, not to the bare size.
- The NF rib arrangement is not interchangeable with another prefix on the same 20 mm seat: one rib on each ring. Swapping NU for NJ changes axial location behaviour even though the 47×18 mm envelope matches.
- The 38.5/31 kN ratings, 3.75 kN Pu and 144 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NF2204EA (EA pressed-steel-cage 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 NF2204EA?
NF2204EA is an NTN NF single-row cylindrical roller bearing to ISO 15: 20 mm bore, 47 mm OD and 18 mm width (0.787 × 1.85 × 0.709 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 38.5 kN, C0 31 kN, Pu 3.75 kN, grease limiting speed 14,000 r/min, oil 19,200 r/min, mass about 144 g. It is open, with the EA high-capacity 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. NF2204EA 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. This page's bearing carries the EA pressed-steel-cage execution.
Can NF2204EA 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 NF2204EA?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 26.5 mm, Ew 41.5 mm. The nominal bore/OD remain 20/47 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 14,000 r/min grease / 19,200 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.