MPNbase

140×250×68 mm bearings

10 models from 1 brand across 3 types share this ISO 15 envelope: 140 mm bore, 250 mm outside diameter, 68 mm width (5.512×9.843×2.677 in), 55 mm radial section.

10 models fit this space 1 brand 10 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)
22228 Spherical Roller SKF open CN 743 900 14000
22228-CCK-W33 Spherical Roller SKF open CN 743 900 18000
C2228 CARB Toroidal Roller SKF open CN 830 1060 14000
C2228-K CARB Toroidal Roller SKF open CN 830 1060 14000
NCF2228-ECJB Cylindrical Roller SKF open CN 680 880 14500
NCF2228-V Cylindrical Roller SKF open CN 693 1020 14500
NJ2228-ECML Cylindrical Roller SKF open CN 655 830 15500
NU2228-ECML Cylindrical Roller SKF open CN 655 830 15000
NUH2228-ECMH Cylindrical Roller SKF open CN 680 880 14500
NUP2228-ECML Cylindrical Roller SKF open CN 655 830 15500

Note: catalogue dynamic load ratings for this envelope span 655.0– 830.0 kN — a 27% spread between designs in the very same 140×250×68 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 140 mm bore bearings for wider or narrower sections, or open a model page for naming-rule decode, applications and graded cross references: 22228, 22228-CCK-W33, C2228, C2228-K, NCF2228-ECJB, NCF2228-V, NJ2228-ECML, NU2228-ECML, NUH2228-ECMH, NUP2228-ECML.

Frequently asked questions

Are all 140×250×68 mm bearings interchangeable?

They share the same ISO 15 boundary dimensions — 140 mm bore, 250 mm OD, 68 mm width (5.512×9.843×2.677 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 10 models listed here and must be checked against the duty before substitution.

Is it a drop-in replacement if two bearings both measure 140×250×68?

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 140×250×68 mm in inches?

140×250×68 mm converts to 5.512×9.843×2.677 in, with a 55 mm (2.165 in) radial section height. These are the ISO 15 general-plan envelope dimensions shared across manufacturers, which is why models such as 22228, 22228-CCK-W33, C2228 mount in the same space despite different internal designs.