MPNbase

55×100×25 mm bearings

31 models from 3 brands across 5 types share this ISO 15 envelope: 55 mm bore, 100 mm outside diameter, 25 mm width (2.165×3.937×0.984 in), 22.5 mm radial section.

31 models fit this space 3 brands 31 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)
2211 Self-Aligning Ball NTN open — 26.7 9.9 807
2211-E-2RS1KTN9 Self-Aligning Ball SKF 2RS CN 27.6 10.6 790
2211-E-2RS1TN9 Self-Aligning Ball SKF 2RS CN 27.6 10.6 790
2211-EKTN9 Self-Aligning Ball SKF open CN 39 13.4 810
2211-ETN9 Self-Aligning Ball SKF open CN 39 13.4 810
2211K Self-Aligning Ball NTN open — 26.7 9.9 807
22211 Spherical Roller SKF open CN 129 127 840
22211-EK Spherical Roller SKF open CN 129 127 1100
22211EAD1 Spherical Roller NTN open CN 155 148 830
22211EAKD1 Spherical Roller NTN open CN 155 148 814
22211EMD1 Spherical Roller NTN open CN 148 140 827
22211EMKD1 Spherical Roller NTN open CN 148 140 811
4211-ATN9 Deep Groove Ball SKF open CN 44.9 44 800
62211-2RS Deep Groove Ball SKF 2RS CN 43.6 29 750
C2211-KTN9 CARB Toroidal Roller SKF open CN 116 114 800
C2211-KV CARB Toroidal Roller SKF open CN 132 134 820
C2211-TN9 CARB Toroidal Roller SKF open CN 116 114 800
C2211-V CARB Toroidal Roller SKF open CN 132 134 820
N2211 Cylindrical Roller NTN open CN 83.5 87 758
N2211EA Cylindrical Roller NTN open CN 120 122 805
NF2211EA Cylindrical Roller NTN open CN 120 122 805
NJ2211 Cylindrical Roller NTN open CN 83.5 87 758
NJ2211-ECP Cylindrical Roller SKF open CN 114 118 810
NJ2211EA Cylindrical Roller NTN open CN 120 122 805
NU2211 Cylindrical Roller SKF open CN 114 118 790
NU2211-NTN Cylindrical Roller NTN open CN 83.5 87 758
NU2211EA Cylindrical Roller NTN open CN 120 122 805
NUP2211 Cylindrical Roller NTN open CN 83.5 87 758
NUP2211-ECP Cylindrical Roller SKF open CN 114 118 820
NUP2211EA Cylindrical Roller NTN open CN 120 122 805
SL182211-XL Cylindrical Roller FAG open CN 140 148 870

Note: catalogue dynamic load ratings for this envelope span 26.7– 155.0 kN — a 481% spread between designs in the very same 55×100×25 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 55 mm bore bearings for wider or narrower sections, or open a model page for naming-rule decode, applications and graded cross references: 2211, 2211-E-2RS1KTN9, 2211-E-2RS1TN9, 2211-EKTN9, 2211-ETN9, 2211K, 22211, 22211-EK, 22211EAD1, 22211EAKD1, 22211EMD1, 22211EMKD1, 4211-ATN9, 62211-2RS, C2211-KTN9, C2211-KV, C2211-TN9, C2211-V, N2211, N2211EA, NF2211EA, NJ2211, NJ2211-ECP, NJ2211EA, NU2211, NU2211-NTN, NU2211EA, NUP2211, NUP2211-ECP, NUP2211EA, SL182211-XL.

Frequently asked questions

Are all 55×100×25 mm bearings interchangeable?

They share the same ISO 15 boundary dimensions — 55 mm bore, 100 mm OD, 25 mm width (2.165×3.937×0.984 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 31 models listed here and must be checked against the duty before substitution.

Is it a drop-in replacement if two bearings both measure 55×100×25?

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 55×100×25 mm in inches?

55×100×25 mm converts to 2.165×3.937×0.984 in, with a 22.5 mm (0.886 in) radial section height. These are the ISO 15 general-plan envelope dimensions shared across manufacturers, which is why models such as 2211, 2211-E-2RS1KTN9, 2211-E-2RS1TN9 mount in the same space despite different internal designs.