MPNbase

50×110×27 mm bearings

50 models from 3 brands across 6 types share this ISO 15 envelope: 50 mm bore, 110 mm outside diameter, 27 mm width (1.969×4.331×1.063 in), 30 mm radial section.

50 models fit this space 3 brands 50 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)
1310 Self-Aligning Ball NTN open — 43.5 14.1 1230
1310-EKTN9 Self-Aligning Ball SKF open CN 43.6 14 1200
1310-ETN9 Self-Aligning Ball SKF open CN 43.6 14 1200
1310K Self-Aligning Ball NTN open — 43.5 14.1 1230
1726310-2RS1 Insert (Y-bearings) SKF 2RS CN 61.8 38 1050
1726310-B-2RS1-VP274 Insert (Y-bearings) SKF 2RS CN 61.8 38 1000
21310 Spherical Roller SKF open CN 159 166 1350
21310-EK Spherical Roller SKF open CN 159 166 1600
21310C Spherical Roller NTN open CN 131 127 1210
21310CK Spherical Roller NTN open CN 131 127 1190
310 Deep Groove Ball SKF open CN 64.4 52 1150
310-ZZ Deep Groove Ball SKF ZZ CN 64.4 52 1150
6310 Deep Groove Ball SKF open CN 65 38 1100
6310-2RS Deep Groove Ball SKF 2RS CN 65 38 1100
6310-2RS-NSK Deep Groove Ball NSK 2RS CN 68 38.5 1060
6310-2RS-NTN Deep Groove Ball NTN 2RS CN 68.5 38.5 1070
6310-M Deep Groove Ball SKF open CN 65 38 1300
6310-NSK Deep Groove Ball NSK open CN 68 38.5 1060
6310-NTN Deep Groove Ball NTN open CN 68.5 38.5 1070
6310-RSR Deep Groove Ball NSK RSR CN 68 38.5 1060
6310-RSR-NTN Deep Groove Ball NTN RSR CN 68.5 38.5 1070
6310-ZZ Deep Groove Ball SKF ZZ CN 65 38 1100
6310-ZZ-NSK Deep Groove Ball NSK ZZ CN 68 38.5 1060
6310-ZZ-NTN Deep Groove Ball NTN ZZ CN 68.5 38.5 1070
7310 Angular Contact Ball SKF open CN 75 51 1100
7310-ACCBM Angular Contact Ball SKF open CN 83 57 1100
7310-BE-2RZP Angular Contact Ball SKF RSR CN 68.9 47.5 1200
7310-BECBM Angular Contact Ball SKF open CN 75 51 1100
7310-BECBP Angular Contact Ball SKF open CN 75 51 1100
7310-BECBY Angular Contact Ball SKF open CN 78 56 1150
7310-BEGAPH Angular Contact Ball SKF open CN 75 51 1100
7310-NTN Angular Contact Ball NTN open CN 82.5 52.5 1090
7310B Angular Contact Ball NTN open CN 75.5 48.5 1110
N310 Cylindrical Roller NTN open CN 96.5 86 1110
N310-ECP Cylindrical Roller SKF open CN 127 112 1100
N310EA Cylindrical Roller NTN open CN 130 113 1120
NF310 Cylindrical Roller NTN open CN 96.5 86 1110
NF310EA Cylindrical Roller NTN open CN 130 113 1120
NJ310 Cylindrical Roller NTN open CN 96.5 86 1110
NJ310-ECP Cylindrical Roller SKF open CN 127 112 1150
NJ310EA Cylindrical Roller NTN open CN 130 113 1120
NU310 Cylindrical Roller SKF open CN 127 112 1100
NU310-NTN Cylindrical Roller NTN open CN 96.5 86 1110
NU310EA Cylindrical Roller NTN open CN 130 113 1120
NUP310 Cylindrical Roller NTN open CN 96.5 86 1110
NUP310-ECP Cylindrical Roller SKF open CN 127 112 1150
NUP310EA Cylindrical Roller NTN open CN 130 113 1120
QJ-310-MA Angular Contact Ball SKF open CN 118 100 1350
QJ-310-PHAS Angular Contact Ball SKF open CN 118 100 1350
QJ310 Angular Contact Ball NTN open CN 102 145 1380

Note: catalogue dynamic load ratings for this envelope span 43.5– 159.0 kN — a 266% spread between designs in the very same 50×110×27 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 50 mm bore bearings for wider or narrower sections, or open a model page for naming-rule decode, applications and graded cross references: 1310, 1310-EKTN9, 1310-ETN9, 1310K, 1726310-2RS1, 1726310-B-2RS1-VP274, 21310, 21310-EK, 21310C, 21310CK, 310, 310-ZZ, 6310, 6310-2RS, 6310-2RS-NSK, 6310-2RS-NTN, 6310-M, 6310-NSK, 6310-NTN, 6310-RSR, 6310-RSR-NTN, 6310-ZZ, 6310-ZZ-NSK, 6310-ZZ-NTN, 7310, 7310-ACCBM, 7310-BE-2RZP, 7310-BECBM, 7310-BECBP, 7310-BECBY, 7310-BEGAPH, 7310-NTN, 7310B, N310, N310-ECP, N310EA, NF310, NF310EA, NJ310, NJ310-ECP, NJ310EA, NU310, NU310-NTN, NU310EA, NUP310, NUP310-ECP, NUP310EA, QJ-310-MA, QJ-310-PHAS, QJ310.

Frequently asked questions

Are all 50×110×27 mm bearings interchangeable?

They share the same ISO 15 boundary dimensions — 50 mm bore, 110 mm OD, 27 mm width (1.969×4.331×1.063 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 50 models listed here and must be checked against the duty before substitution.

Is it a drop-in replacement if two bearings both measure 50×110×27?

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 50×110×27 mm in inches?

50×110×27 mm converts to 1.969×4.331×1.063 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 1310, 1310-EKTN9, 1310-ETN9 mount in the same space despite different internal designs.