MPNbase

70×125×31 mm bearings

12 models from 2 brands across 5 types share this ISO 15 envelope: 70 mm bore, 125 mm outside diameter, 31 mm width (2.756×4.921×1.220 in), 27.5 mm radial section.

12 models fit this space 2 brands 12 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)
2214 Self-Aligning Ball NTN open — 44 17.1 1550
2214-E-2RS1TN9 Self-Aligning Ball SKF 2RS CN 35.8 14.6 1450
22214 Spherical Roller SKF open CN 213 228 1550
22214-EK Spherical Roller SKF open CN 213 228 2150
4214-ATN9 Deep Groove Ball SKF open CN 70.2 73.5 1500
62214-2RS Deep Groove Ball SKF 2RS CN 60.5 45 1400
C2214-KTN9 CARB Toroidal Roller SKF open CN 186 196 1500
C2214-TN9 CARB Toroidal Roller SKF open CN 186 196 1500
C2214-V CARB Toroidal Roller SKF open CN 212 228 1550
NJ2214-ECP Cylindrical Roller SKF open CN 180 193 1500
NU2214-ECP Cylindrical Roller SKF open CN 180 193 1500
NUP2214-ECP Cylindrical Roller SKF open CN 180 193 1550

Note: catalogue dynamic load ratings for this envelope span 35.8– 213.0 kN — a 495% spread between designs in the very same 70×125×31 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 70 mm bore bearings for wider or narrower sections, or open a model page for naming-rule decode, applications and graded cross references: 2214, 2214-E-2RS1TN9, 22214, 22214-EK, 4214-ATN9, 62214-2RS, C2214-KTN9, C2214-TN9, C2214-V, NJ2214-ECP, NU2214-ECP, NUP2214-ECP.

Frequently asked questions

Are all 70×125×31 mm bearings interchangeable?

They share the same ISO 15 boundary dimensions — 70 mm bore, 125 mm OD, 31 mm width (2.756×4.921×1.220 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 12 models listed here and must be checked against the duty before substitution.

Is it a drop-in replacement if two bearings both measure 70×125×31?

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 70×125×31 mm in inches?

70×125×31 mm converts to 2.756×4.921×1.220 in, with a 27.5 mm (1.083 in) radial section height. These are the ISO 15 general-plan envelope dimensions shared across manufacturers, which is why models such as 2214, 2214-E-2RS1TN9, 22214 mount in the same space despite different internal designs.