MPNbase

40×90×33 mm bearings

28 models from 3 brands across 4 types share this ISO 15 envelope: 40 mm bore, 90 mm outside diameter, 33 mm width (1.575×3.543×1.299 in), 25 mm radial section.

28 models fit this space 3 brands 28 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)
22308 Spherical Roller SKF open CN 155 140 1050
22308-EK Spherical Roller SKF open CN 155 140 1250
22308EAD1 Spherical Roller NTN open CN 169 152 1020
22308EAKD1 Spherical Roller NTN open CN 169 152 1000
22308EMD1 Spherical Roller NTN open CN 169 152 1030
22308EMKD1 Spherical Roller NTN open CN 169 152 1010
2308 Self-Aligning Ball NTN open — 45.5 13.5 918
2308-E-2RS1KTN9 Self-Aligning Ball SKF 2RS CN 33.8 11.2 960
2308-E-2RS1TN9 Self-Aligning Ball SKF 2RS CN 33.8 11.2 960
2308-EKTN9 Self-Aligning Ball SKF open CN 54 16 930
2308-ETN9 Self-Aligning Ball SKF open CN 54 16 930
2308K Self-Aligning Ball NTN open — 45.5 13.5 918
4308-ATN9 Deep Groove Ball SKF open CN 55.9 45 950
62308-2RS Deep Groove Ball SKF 2RS CN 41 24 920
N2308 Cylindrical Roller NTN open CN 91.5 88 932
N2308EA Cylindrical Roller NTN open CN 135 122 952
NF2308EA Cylindrical Roller NTN open CN 135 122 952
NJ2308 Cylindrical Roller NTN open CN 91.5 88 932
NJ2308-ECP Cylindrical Roller SKF open CN 129 120 950
NJ2308EA Cylindrical Roller NTN open CN 135 122 952
NJG2308-VH Cylindrical Roller SKF open CN 145 156 1000
NU2308 Cylindrical Roller SKF open CN 129 120 930
NU2308-NTN Cylindrical Roller NTN open CN 91.5 88 932
NU2308EA Cylindrical Roller NTN open CN 135 122 952
NUP2308 Cylindrical Roller NTN open CN 91.5 88 932
NUP2308-ECP Cylindrical Roller SKF open CN 129 120 980
NUP2308EA Cylindrical Roller NTN open CN 135 122 952
SL192308-XL Cylindrical Roller FAG open CN 170 153 1010

Note: catalogue dynamic load ratings for this envelope span 33.8– 170.0 kN — a 403% spread between designs in the very same 40×90×33 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 40 mm bore bearings for wider or narrower sections, or open a model page for naming-rule decode, applications and graded cross references: 22308, 22308-EK, 22308EAD1, 22308EAKD1, 22308EMD1, 22308EMKD1, 2308, 2308-E-2RS1KTN9, 2308-E-2RS1TN9, 2308-EKTN9, 2308-ETN9, 2308K, 4308-ATN9, 62308-2RS, N2308, N2308EA, NF2308EA, NJ2308, NJ2308-ECP, NJ2308EA, NJG2308-VH, NU2308, NU2308-NTN, NU2308EA, NUP2308, NUP2308-ECP, NUP2308EA, SL192308-XL.

Frequently asked questions

Are all 40×90×33 mm bearings interchangeable?

They share the same ISO 15 boundary dimensions — 40 mm bore, 90 mm OD, 33 mm width (1.575×3.543×1.299 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 28 models listed here and must be checked against the duty before substitution.

Is it a drop-in replacement if two bearings both measure 40×90×33?

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 40×90×33 mm in inches?

40×90×33 mm converts to 1.575×3.543×1.299 in, with a 25 mm (0.984 in) radial section height. These are the ISO 15 general-plan envelope dimensions shared across manufacturers, which is why models such as 22308, 22308-EK, 22308EAD1 mount in the same space despite different internal designs.