MPNbase

25×52×25 mm bearings

12 models from 2 brands across 1 type share this ISO 15 envelope: 25 mm bore, 52 mm outside diameter, 25 mm width (0.984×2.047×0.984 in), 13.5 mm radial section.

12 models fit this space 2 brands 12 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)
NATR-25 Support Rollers SKF open CN 14.7 25.5 280
NATR-25-PPA Support Rollers SKF open CN 14.7 25.5 270
NATR25 Support Rollers FAG open CN 15.3 27 275
NATR25-PP Support Rollers FAG 2RS CN 15.3 27 271
NATV-25 Support Rollers SKF open CN 19.8 44 290
NATV-25-PPA Support Rollers SKF open CN 19.8 44 280
NATV25 Support Rollers FAG open CN 20.2 44.5 285
NATV25-PP Support Rollers FAG 2RS CN 20.2 44.5 281
NUTR-25-A Support Rollers SKF open CN 29.7 36 280
NUTR25 Support Rollers FAG open CN 29.5 41.5 281
PWTR-25-2RS Support Rollers SKF open CN 23.8 26.5 280
PWTR25-2RS-XL Support Rollers FAG 2RS CN 25.5 33.5 281

Note: catalogue dynamic load ratings for this envelope span 14.7– 29.7 kN — a 102% spread between designs in the very same 25×52×25 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: NATR-25, NATR-25-PPA, NATR25, NATR25-PP, NATV-25, NATV-25-PPA, NATV25, NATV25-PP, NUTR-25-A, NUTR25, PWTR-25-2RS, PWTR25-2RS-XL.

Frequently asked questions

Are all 25×52×25 mm bearings interchangeable?

They share the same ISO 15 boundary dimensions — 25 mm bore, 52 mm OD, 25 mm width (0.984×2.047×0.984 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 12 models listed here and must be checked against the duty before substitution.

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

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 25×52×25 mm in inches?

25×52×25 mm converts to 0.984×2.047×0.984 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 NATR-25, NATR-25-PPA, NATR25 mount in the same space despite different internal designs.