MPNbase

105×190×36 mm bearings

26 models from 3 brands across 4 types share this ISO 15 envelope: 105 mm bore, 190 mm outside diameter, 36 mm width (4.134×7.480×1.417 in), 42.5 mm radial section.

26 models fit this space 3 brands 26 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)
1221 Self-Aligning Ball NTN open — 75 32.5 4430
6221 Deep Groove Ball SKF open CN 140 104 3800
6221-2RS Deep Groove Ball NSK 2RS CN 146 105 3790
6221-2RS-NTN Deep Groove Ball NTN 2RS CN 147 105 3700
6221-NSK Deep Groove Ball NSK open CN 146 105 3790
6221-NTN Deep Groove Ball NTN open CN 147 105 3700
6221-RSR Deep Groove Ball NSK RSR CN 146 105 3790
6221-RSR-NTN Deep Groove Ball NTN RSR CN 147 105 3700
6221-ZZ Deep Groove Ball SKF ZZ CN 140 104 3900
6221-ZZ-NSK Deep Groove Ball NSK ZZ CN 146 105 3790
6221-ZZ-NTN Deep Groove Ball NTN ZZ CN 147 105 3700
7221 Angular Contact Ball SKF open CN 156 150 3950
7221-BECBM Angular Contact Ball SKF open CN 156 150 3950
7221-BECBP Angular Contact Ball SKF open CN 156 150 3950
7221-NTN Angular Contact Ball NTN open CN 173 142 3790
7221B Angular Contact Ball NTN open CN 157 129 3870
N221 Cylindrical Roller NTN open CN 223 241 3870
N221-ECP Cylindrical Roller SKF open CN 300 315 3900
NF221 Cylindrical Roller NTN open CN 223 241 3870
NJ221 Cylindrical Roller NTN open CN 223 241 3870
NJ221-ECP Cylindrical Roller SKF open CN 300 315 4000
NU221 Cylindrical Roller NTN open CN 223 241 3870
NU221-ECP Cylindrical Roller SKF open CN 300 315 3950
NUP221 Cylindrical Roller NTN open CN 223 241 3870
NUP221-ECP Cylindrical Roller SKF open CN 300 315 4200
QJ221 Angular Contact Ball NTN open CN 218 400 4750

Note: catalogue dynamic load ratings for this envelope span 75.0– 300.0 kN — a 300% spread between designs in the very same 105×190×36 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 105 mm bore bearings for wider or narrower sections, or open a model page for naming-rule decode, applications and graded cross references: 1221, 6221, 6221-2RS, 6221-2RS-NTN, 6221-NSK, 6221-NTN, 6221-RSR, 6221-RSR-NTN, 6221-ZZ, 6221-ZZ-NSK, 6221-ZZ-NTN, 7221, 7221-BECBM, 7221-BECBP, 7221-NTN, 7221B, N221, N221-ECP, NF221, NJ221, NJ221-ECP, NU221, NU221-ECP, NUP221, NUP221-ECP, QJ221.

Frequently asked questions

Are all 105×190×36 mm bearings interchangeable?

They share the same ISO 15 boundary dimensions — 105 mm bore, 190 mm OD, 36 mm width (4.134×7.480×1.417 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 26 models listed here and must be checked against the duty before substitution.

Is it a drop-in replacement if two bearings both measure 105×190×36?

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 105×190×36 mm in inches?

105×190×36 mm converts to 4.134×7.480×1.417 in, with a 42.5 mm (1.673 in) radial section height. These are the ISO 15 general-plan envelope dimensions shared across manufacturers, which is why models such as 1221, 6221, 6221-2RS mount in the same space despite different internal designs.