MPNbase

90×160×30 mm bearings

40 models from 3 brands across 4 types share this ISO 15 envelope: 90 mm bore, 160 mm outside diameter, 30 mm width (3.543×6.299×1.181 in), 35 mm radial section.

40 models fit this space 3 brands 40 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)
1218 Self-Aligning Ball NTN open — 57.5 23.5 2560
1218-K Self-Aligning Ball SKF open CN 57.2 23.6 2500
1218K Self-Aligning Ball NTN open — 57.5 23.5 2560
218 Deep Groove Ball SKF open CN 112 114 2350
218-ZZ Deep Groove Ball SKF ZZ CN 112 114 2350
6218 Deep Groove Ball SKF open CN 101 73.5 2200
6218-2RS Deep Groove Ball SKF 2RS CN 101 73.5 2300
6218-2RS-NSK Deep Groove Ball NSK 2RS CN 106 71.5 2180
6218-2RS-NTN Deep Groove Ball NTN 2RS CN 106 71.5 2150
6218-M Deep Groove Ball SKF open CN 101 73.5 2650
6218-NSK Deep Groove Ball NSK open CN 106 71.5 2180
6218-NTN Deep Groove Ball NTN open CN 106 71.5 2150
6218-RSR Deep Groove Ball NSK RSR CN 106 71.5 2180
6218-RSR-NTN Deep Groove Ball NTN RSR CN 106 71.5 2150
6218-ZZ Deep Groove Ball SKF ZZ CN 101 73.5 2300
6218-ZZ-NSK Deep Groove Ball NSK ZZ CN 106 71.5 2180
6218-ZZ-NTN Deep Groove Ball NTN ZZ CN 106 71.5 2150
7218 Angular Contact Ball SKF open CN 108 96.5 2300
7218-BECBM Angular Contact Ball SKF open CN 116 104 2300
7218-BECBP Angular Contact Ball SKF open CN 116 104 2300
7218-BECBY Angular Contact Ball SKF open CN 116 104 2300
7218-BEP Angular Contact Ball SKF open CN 108 96.5 2300
7218-NTN Angular Contact Ball NTN open CN 130 103 2180
7218B Angular Contact Ball NTN open CN 118 94 2220
N218 Cylindrical Roller NTN open CN 169 178 2250
N218-ECP Cylindrical Roller SKF open CN 208 220 2300
N218EA Cylindrical Roller NTN open CN 215 217 2370
NF218 Cylindrical Roller NTN open CN 169 178 2250
NF218EA Cylindrical Roller NTN open CN 215 217 2370
NJ218 Cylindrical Roller NTN open CN 169 178 2250
NJ218-ECP Cylindrical Roller SKF open CN 208 220 2300
NJ218EA Cylindrical Roller NTN open CN 215 217 2370
NU218 Cylindrical Roller SKF open CN 208 220 2300
NU218-NTN Cylindrical Roller NTN open CN 169 178 2250
NU218EA Cylindrical Roller NTN open CN 215 217 2370
NUP218 Cylindrical Roller NTN open CN 169 178 2250
NUP218-ECP Cylindrical Roller SKF open CN 208 220 2450
NUP218EA Cylindrical Roller NTN open CN 215 217 2370
QJ-218-N2MA Angular Contact Ball SKF open CN 186 200 2750
QJ218 Angular Contact Ball NTN open CN 164 293 2760

Note: catalogue dynamic load ratings for this envelope span 57.2– 215.0 kN — a 276% spread between designs in the very same 90×160×30 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 90 mm bore bearings for wider or narrower sections, or open a model page for naming-rule decode, applications and graded cross references: 1218, 1218-K, 1218K, 218, 218-ZZ, 6218, 6218-2RS, 6218-2RS-NSK, 6218-2RS-NTN, 6218-M, 6218-NSK, 6218-NTN, 6218-RSR, 6218-RSR-NTN, 6218-ZZ, 6218-ZZ-NSK, 6218-ZZ-NTN, 7218, 7218-BECBM, 7218-BECBP, 7218-BECBY, 7218-BEP, 7218-NTN, 7218B, N218, N218-ECP, N218EA, NF218, NF218EA, NJ218, NJ218-ECP, NJ218EA, NU218, NU218-NTN, NU218EA, NUP218, NUP218-ECP, NUP218EA, QJ-218-N2MA, QJ218.

Frequently asked questions

Are all 90×160×30 mm bearings interchangeable?

They share the same ISO 15 boundary dimensions — 90 mm bore, 160 mm OD, 30 mm width (3.543×6.299×1.181 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 40 models listed here and must be checked against the duty before substitution.

Is it a drop-in replacement if two bearings both measure 90×160×30?

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 90×160×30 mm in inches?

90×160×30 mm converts to 3.543×6.299×1.181 in, with a 35 mm (1.378 in) radial section height. These are the ISO 15 general-plan envelope dimensions shared across manufacturers, which is why models such as 1218, 1218-K, 1218K mount in the same space despite different internal designs.