MPNbase

120×180×28 mm bearings

19 models from 3 brands across 3 types share this ISO 15 envelope: 120 mm bore, 180 mm outside diameter, 28 mm width (4.724×7.087×1.102 in), 30 mm radial section.

19 models fit this space 3 brands 19 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)
6024 Deep Groove Ball SKF open CN 88.4 80 2100
6024-2RS Deep Groove Ball SKF 2RS CN 88.4 80 2150
6024-2RS-NSK Deep Groove Ball NSK 2RS CN 97 80 2080
6024-2RS-NTN Deep Groove Ball NTN 2RS CN 94 79.5 2070
6024-MA Deep Groove Ball SKF open CN 88.4 80 2450
6024-NSK Deep Groove Ball NSK open CN 97 80 2080
6024-NTN Deep Groove Ball NTN open CN 94 79.5 2070
6024-RSR Deep Groove Ball NSK RSR CN 97 80 2080
6024-RSR-NTN Deep Groove Ball NTN RSR CN 94 79.5 2070
6024-ZZ Deep Groove Ball SKF ZZ CN 88.4 80 2200
6024-ZZ-NSK Deep Groove Ball NSK ZZ CN 97 80 2080
6024-ZZ-NTN Deep Groove Ball NTN ZZ CN 94 79.5 2070
7024 Angular Contact Ball NTN open CN 104 98.5 2470
7024-BGM Angular Contact Ball SKF open CN 87.1 93 2400
N1024 Cylindrical Roller NTN open CN 154 191 2400
NJ1024 Cylindrical Roller NTN open CN 154 191 2400
NU1024 Cylindrical Roller NTN open CN 154 191 2400
NU1024-ML Cylindrical Roller SKF open CN 134 183 2550
NUP1024 Cylindrical Roller NTN open CN 154 191 2400

Note: catalogue dynamic load ratings for this envelope span 87.1– 154.0 kN — a 77% spread between designs in the very same 120×180×28 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 120 mm bore bearings for wider or narrower sections, or open a model page for naming-rule decode, applications and graded cross references: 6024, 6024-2RS, 6024-2RS-NSK, 6024-2RS-NTN, 6024-MA, 6024-NSK, 6024-NTN, 6024-RSR, 6024-RSR-NTN, 6024-ZZ, 6024-ZZ-NSK, 6024-ZZ-NTN, 7024, 7024-BGM, N1024, NJ1024, NU1024, NU1024-ML, NUP1024.

Frequently asked questions

Are all 120×180×28 mm bearings interchangeable?

They share the same ISO 15 boundary dimensions — 120 mm bore, 180 mm OD, 28 mm width (4.724×7.087×1.102 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 19 models listed here and must be checked against the duty before substitution.

Is it a drop-in replacement if two bearings both measure 120×180×28?

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 120×180×28 mm in inches?

120×180×28 mm converts to 4.724×7.087×1.102 in, with a 30 mm (1.181 in) radial section height. These are the ISO 15 general-plan envelope dimensions shared across manufacturers, which is why models such as 6024, 6024-2RS, 6024-2RS-NSK mount in the same space despite different internal designs.