MPNbase

50×90×20 mm bearings

48 models from 3 brands across 5 types share this ISO 15 envelope: 50 mm bore, 90 mm outside diameter, 20 mm width (1.969×3.543×0.787 in), 20 mm radial section.

48 models fit this space 3 brands 48 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)
11210-TN9 Self-Aligning Ball SKF open CN 26.5 9.15 850
1210 Self-Aligning Ball NTN open — 22.8 8.1 535
1210-EKTN9 Self-Aligning Ball SKF open CN 26.5 9.15 530
1210-ETN9 Self-Aligning Ball SKF open CN 26.5 9.15 530
1210K Self-Aligning Ball NTN open — 22.8 8.1 535
1726210-2RS1 Insert (Y-bearings) SKF 2RS CN 35.1 23.2 440
210 Deep Groove Ball SKF open CN 39.1 34.5 500
210-ZZ Deep Groove Ball SKF ZZ CN 39.1 34.5 500
6210 Deep Groove Ball SKF open CN 37.1 23.2 460
6210-2RS Deep Groove Ball SKF 2RS CN 37.1 23.2 460
6210-2RS-NSK Deep Groove Ball NSK 2RS CN 38.5 23.2 459
6210-2RS-NTN Deep Groove Ball NTN 2RS CN 39 23.2 454
6210-M Deep Groove Ball SKF open CN 37.1 23.2 520
6210-NSK Deep Groove Ball NSK open CN 38.5 23.2 459
6210-NTN Deep Groove Ball NTN open CN 39 23.2 454
6210-RSR Deep Groove Ball NSK RSR CN 38.5 23.2 459
6210-RSR-NTN Deep Groove Ball NTN RSR CN 39 23.2 454
6210-ZZ Deep Groove Ball SKF ZZ CN 37.1 23.2 470
6210-ZZ-NSK Deep Groove Ball NSK ZZ CN 38.5 23.2 459
6210-ZZ-NTN Deep Groove Ball NTN ZZ CN 39 23.2 454
7210 Angular Contact Ball SKF open CN 37.7 28.5 470
7210-ACCBM Angular Contact Ball SKF open CN 45.5 35.5 470
7210-BE-2RZP Angular Contact Ball SKF RSR CN 37.7 28.5 550
7210-BECBM Angular Contact Ball SKF open CN 40 31 470
7210-BECBP Angular Contact Ball SKF open CN 40 31 470
7210-BECBPH Angular Contact Ball SKF open CN 40 31 470
7210-BECBY Angular Contact Ball SKF open CN 41.5 33.5 470
7210-BEP Angular Contact Ball SKF open CN 37.7 28.5 470
7210-NTN Angular Contact Ball NTN open CN 45.5 31.5 457
7210B Angular Contact Ball NTN open CN 41.5 28.6 466
N210 Cylindrical Roller NTN open CN 53.5 51 460
N210-ECP Cylindrical Roller SKF open CN 73.5 69.5 480
N210EA Cylindrical Roller NTN open CN 81.5 76.5 470
NF210 Cylindrical Roller NTN open CN 53.5 51 460
NF210EA Cylindrical Roller NTN open CN 81.5 76.5 470
NJ210 Cylindrical Roller NTN open CN 53.5 51 460
NJ210-ECP Cylindrical Roller SKF open CN 73.5 69.5 490
NJ210EA Cylindrical Roller NTN open CN 81.5 76.5 470
NU210 Cylindrical Roller SKF open CN 73.5 69.5 470
NU210-NTN Cylindrical Roller NTN open CN 53.5 51 460
NU210EA Cylindrical Roller NTN open CN 81.5 76.5 470
NUP210 Cylindrical Roller NTN open CN 53.5 51 460
NUP210-ECP Cylindrical Roller SKF open CN 73.5 69.5 500
NUP210EA Cylindrical Roller NTN open CN 81.5 76.5 470
QJ-210-MA Angular Contact Ball SKF open CN 65.5 61 590
QJ210 Angular Contact Ball NTN open CN 57.5 89 603
W6210-2RS Deep Groove Ball SKF 2RS CN 30.2 23.2 449
W6210-ZZ Deep Groove Ball SKF ZZ CN 30.2 23.2 453

Note: catalogue dynamic load ratings for this envelope span 22.8– 81.5 kN — a 257% spread between designs in the very same 50×90×20 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 50 mm bore bearings for wider or narrower sections, or open a model page for naming-rule decode, applications and graded cross references: 11210-TN9, 1210, 1210-EKTN9, 1210-ETN9, 1210K, 1726210-2RS1, 210, 210-ZZ, 6210, 6210-2RS, 6210-2RS-NSK, 6210-2RS-NTN, 6210-M, 6210-NSK, 6210-NTN, 6210-RSR, 6210-RSR-NTN, 6210-ZZ, 6210-ZZ-NSK, 6210-ZZ-NTN, 7210, 7210-ACCBM, 7210-BE-2RZP, 7210-BECBM, 7210-BECBP, 7210-BECBPH, 7210-BECBY, 7210-BEP, 7210-NTN, 7210B, N210, N210-ECP, N210EA, NF210, NF210EA, NJ210, NJ210-ECP, NJ210EA, NU210, NU210-NTN, NU210EA, NUP210, NUP210-ECP, NUP210EA, QJ-210-MA, QJ210, W6210-2RS, W6210-ZZ.

Frequently asked questions

Are all 50×90×20 mm bearings interchangeable?

They share the same ISO 15 boundary dimensions — 50 mm bore, 90 mm OD, 20 mm width (1.969×3.543×0.787 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 48 models listed here and must be checked against the duty before substitution.

Is it a drop-in replacement if two bearings both measure 50×90×20?

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 50×90×20 mm in inches?

50×90×20 mm converts to 1.969×3.543×0.787 in, with a 20 mm (0.787 in) radial section height. These are the ISO 15 general-plan envelope dimensions shared across manufacturers, which is why models such as 11210-TN9, 1210, 1210-EKTN9 mount in the same space despite different internal designs.