MPNbase

25×52×18 mm bearings

26 models from 3 brands across 6 types share this ISO 15 envelope: 25 mm bore, 52 mm outside diameter, 18 mm width (0.984×2.047×0.709 in), 13.5 mm radial section.

26 models fit this space 3 brands 26 with catalogue C rating

Dimensional interchange — verify before substituting

These bearings are interchangeable on boundary dimensions per ISO 15 — same bore, OD and width. They are not guaranteed drop-in equivalents: compare load ratings, seals, clearance, cage, precision and axial-locating design for the specific duty. Models without a catalogue C rating on this site carry ISO 15 geometry only; request the manufacturer table before a load-critical replacement.

Model Type Brand Seal Clearance C (kN) C0 (kN) Mass (g)
2205 Self-Aligning Ball NTN open — 12.4 3.45 160
2205-E-2RS1KTN9 Self-Aligning Ball SKF 2RS CN 14.3 4 160
2205-E-2RS1TN9 Self-Aligning Ball SKF 2RS CN 14.3 4 160
2205-EKTN9 Self-Aligning Ball SKF open CN 16.8 4.4 160
2205-ETN9 Self-Aligning Ball SKF open CN 16.8 4.4 160
2205K Self-Aligning Ball NTN open — 12.4 3.45 160
22205 Spherical Roller SKF open CN 49.9 44 260
22205-EK Spherical Roller SKF open CN 49.9 44 330
22205EAKW33 Spherical Roller NTN open CN 57.3 46.1 169
22205EAW33 Spherical Roller NTN open CN 57.3 46.1 173
22205EMKW33 Spherical Roller NTN open CN 57.3 46.1 171
22205EMW33 Spherical Roller NTN open CN 57.3 46.1 174
4205-ATN9 Deep Groove Ball SKF open CN 19 14.6 170
51305 Thrust Ball NTN open CN 35.5 61.5 176
51305-SKF Thrust Ball SKF open CN 34.5 60 170
62205-2RS Deep Groove Ball SKF 2RS CN 14 7.8 130
N2205EA Cylindrical Roller NTN open CN 41.5 34.5 163
NA-2205-2RS Support Rollers SKF open CN 16.8 20 210
NF2205EA Cylindrical Roller NTN open CN 41.5 34.5 163
NJ2205-ECP Cylindrical Roller SKF open CN 39 34 170
NJ2205EA Cylindrical Roller NTN open CN 41.5 34.5 163
NU2205 Cylindrical Roller SKF open CN 39 34 160
NU2205EA Cylindrical Roller NTN open CN 41.5 34.5 163
NUP2205-ECP Cylindrical Roller SKF open CN 39 34 170
NUP2205EA Cylindrical Roller NTN open CN 41.5 34.5 163
SL182205-XL Cylindrical Roller FAG open CN 51 44.5 180

Note: catalogue dynamic load ratings for this envelope span 12.4– 57.3 kN — a 362% spread between designs in the very same 25×52×18 mm space. The higher-rated unit is not an upgrade for every duty (it may run at lower limiting speed), but ignoring the gap will over- or under-life the replacement.

Substitution verification checklist

  1. Load rating. Check C (dynamic) and C0 (static) against the original life calculation — the table above shows which models carry verified catalogue values.
  2. Sealing. Open, -ZZ shields and -2RS contact seals are not equivalent in friction, speed or contamination protection; match the housing environment, not just the suffix on the old box.
  3. Internal clearance. CN/C3/C4 changes with fit and operating temperature; an interference inner-ring mount commonly needs C3 where the bench bearing ran CN.
  4. Cage and precision. Stamped steel, machined brass and polymer cages, and P0/P6/P5 tolerance classes, carry different speed and shock limits.
  5. Locating behaviour. Within one envelope an NU cylindrical roller floats axially while an NJ/NUP locates; ball designs take thrust that roller locating schemes do not. Preserve the shaft's locating arrangement.

Browse all 25 mm bore bearings for wider or narrower sections, or open a model page for naming-rule decode, applications and graded cross references: 2205, 2205-E-2RS1KTN9, 2205-E-2RS1TN9, 2205-EKTN9, 2205-ETN9, 2205K, 22205, 22205-EK, 22205EAKW33, 22205EAW33, 22205EMKW33, 22205EMW33, 4205-ATN9, 51305, 51305-SKF, 62205-2RS, N2205EA, NA-2205-2RS, NF2205EA, NJ2205-ECP, NJ2205EA, NU2205, NU2205EA, NUP2205-ECP, NUP2205EA, SL182205-XL.

Frequently asked questions

Are all 25×52×18 mm bearings interchangeable?

They share the same ISO 15 boundary dimensions — 25 mm bore, 52 mm OD, 18 mm width (0.984×2.047×0.709 in) — so they fit the same shaft, housing bore and axial space. Interchangeability ends at the envelope: dynamic load rating, seal arrangement, internal clearance, cage and precision class differ between the 26 models listed here and must be checked against the duty before substitution.

Is it a drop-in replacement if two bearings both measure 25×52×18?

Only after verification. Confirm five things in order: (1) the C/C0 load ratings meet the original life calculation, (2) the seal type is equivalent or acceptable for the contamination level (open vs -ZZ vs -2RS), (3) internal clearance matches (CN/C3/C4 — an interference fit changes residual play), (4) cage material and precision class suit the speed, and (5) the axial-locating behaviour is the same (for example an NU cylindrical roller floats while an NJ locates one way). Same dimensions alone never guarantee equal performance.

What is 25×52×18 mm in inches?

25×52×18 mm converts to 0.984×2.047×0.709 in, with a 13.5 mm (0.531 in) radial section height. These are the ISO 15 general-plan envelope dimensions shared across manufacturers, which is why models such as 2205, 2205-E-2RS1KTN9, 2205-E-2RS1TN9 mount in the same space despite different internal designs.