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45×85×23 mm bearings

30 models from 3 brands across 5 types share this ISO 15 envelope: 45 mm bore, 85 mm outside diameter, 23 mm width (1.772×3.346×0.906 in), 20 mm radial section.

30 models fit this space 3 brands 30 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)
2209 Self-Aligning Ball NTN open — 23.3 8.15 556
2209-E-2RS1KTN9 Self-Aligning Ball SKF 2RS CN 22.9 7.8 530
2209-E-2RS1TN9 Self-Aligning Ball SKF 2RS CN 22.9 7.8 530
2209-EKTN9 Self-Aligning Ball SKF open CN 32.5 10.6 550
2209-ETN9 Self-Aligning Ball SKF open CN 32.5 10.6 550
2209K Self-Aligning Ball NTN open — 23.3 8.15 556
22209 Spherical Roller SKF open CN 104 98 580
22209-EK Spherical Roller SKF open CN 104 98 810
22209EAD1 Spherical Roller NTN open CN 121 113 572
22209EAKD1 Spherical Roller NTN open CN 121 113 561
22209EMD1 Spherical Roller NTN open CN 116 106 577
22209EMKD1 Spherical Roller NTN open CN 116 106 566
4209-ATN9 Deep Groove Ball SKF open CN 39 36 540
62209-2RS Deep Groove Ball SKF 2RS CN 33.2 21.6 510
C2209-KTN9 CARB Toroidal Roller SKF open CN 93 93 560
C2209-TN9 CARB Toroidal Roller SKF open CN 93 93 560
C2209-V CARB Toroidal Roller SKF open CN 106 110 580
N2209 Cylindrical Roller NTN open CN 68 68 520
N2209EA Cylindrical Roller NTN open CN 90 84.5 533
NF2209EA Cylindrical Roller NTN open CN 90 84.5 533
NJ2209 Cylindrical Roller NTN open CN 68 68 520
NJ2209-ECP Cylindrical Roller SKF open CN 85 81.5 540
NJ2209EA Cylindrical Roller NTN open CN 90 84.5 533
NU2209 Cylindrical Roller SKF open CN 85 81.5 520
NU2209-NTN Cylindrical Roller NTN open CN 68 68 520
NU2209EA Cylindrical Roller NTN open CN 90 84.5 533
NUP2209 Cylindrical Roller NTN open CN 68 68 520
NUP2209-ECP Cylindrical Roller SKF open CN 85 81.5 550
NUP2209EA Cylindrical Roller NTN open CN 90 84.5 533
SL182209-XL Cylindrical Roller FAG open CN 101 98 590

Note: catalogue dynamic load ratings for this envelope span 22.9– 121.0 kN — a 428% spread between designs in the very same 45×85×23 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 45 mm bore bearings for wider or narrower sections, or open a model page for naming-rule decode, applications and graded cross references: 2209, 2209-E-2RS1KTN9, 2209-E-2RS1TN9, 2209-EKTN9, 2209-ETN9, 2209K, 22209, 22209-EK, 22209EAD1, 22209EAKD1, 22209EMD1, 22209EMKD1, 4209-ATN9, 62209-2RS, C2209-KTN9, C2209-TN9, C2209-V, N2209, N2209EA, NF2209EA, NJ2209, NJ2209-ECP, NJ2209EA, NU2209, NU2209-NTN, NU2209EA, NUP2209, NUP2209-ECP, NUP2209EA, SL182209-XL.

Frequently asked questions

Are all 45×85×23 mm bearings interchangeable?

They share the same ISO 15 boundary dimensions — 45 mm bore, 85 mm OD, 23 mm width (1.772×3.346×0.906 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 30 models listed here and must be checked against the duty before substitution.

Is it a drop-in replacement if two bearings both measure 45×85×23?

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 45×85×23 mm in inches?

45×85×23 mm converts to 1.772×3.346×0.906 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 2209, 2209-E-2RS1KTN9, 2209-E-2RS1TN9 mount in the same space despite different internal designs.