MPNbase

30×72×27 mm bearings

17 models from 3 brands across 3 types share this ISO 15 envelope: 30 mm bore, 72 mm outside diameter, 27 mm width (1.181×2.835×1.063 in), 21 mm radial section.

17 models fit this space 3 brands 17 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)
2306 Self-Aligning Ball NTN open — 32 8.75 500
2306-E-2RS1KTN9 Self-Aligning Ball SKF 2RS CN 22.5 6.8 510
2306-E-2RS1TN9 Self-Aligning Ball SKF 2RS CN 22.5 6.8 510
2306-K Self-Aligning Ball SKF open CN 31.2 8.8 500
2306K Self-Aligning Ball NTN open — 32 8.75 500
4306-ATN9 Deep Groove Ball SKF open CN 41 30 500
62306-2RS Deep Groove Ball SKF 2RS CN 28.1 16 500
N2306EA Cylindrical Roller NTN open CN 88 77.5 526
NF2306EA Cylindrical Roller NTN open CN 88 77.5 526
NJ2306-ECP Cylindrical Roller SKF open CN 83 75 540
NJ2306EA Cylindrical Roller NTN open CN 88 77.5 526
NJG2306-VH Cylindrical Roller SKF open CN 84.2 86.5 560
NU2306 Cylindrical Roller SKF open CN 83 75 530
NU2306EA Cylindrical Roller NTN open CN 88 77.5 526
NUP2306-ECP Cylindrical Roller SKF open CN 83 75 540
NUP2306EA Cylindrical Roller NTN open CN 88 77.5 526
SL192306-XL Cylindrical Roller FAG open CN 100 87 560

Note: catalogue dynamic load ratings for this envelope span 22.5– 100.0 kN — a 344% spread between designs in the very same 30×72×27 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 30 mm bore bearings for wider or narrower sections, or open a model page for naming-rule decode, applications and graded cross references: 2306, 2306-E-2RS1KTN9, 2306-E-2RS1TN9, 2306-K, 2306K, 4306-ATN9, 62306-2RS, N2306EA, NF2306EA, NJ2306-ECP, NJ2306EA, NJG2306-VH, NU2306, NU2306EA, NUP2306-ECP, NUP2306EA, SL192306-XL.

Frequently asked questions

Are all 30×72×27 mm bearings interchangeable?

They share the same ISO 15 boundary dimensions — 30 mm bore, 72 mm OD, 27 mm width (1.181×2.835×1.063 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 17 models listed here and must be checked against the duty before substitution.

Is it a drop-in replacement if two bearings both measure 30×72×27?

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 30×72×27 mm in inches?

30×72×27 mm converts to 1.181×2.835×1.063 in, with a 21 mm (0.827 in) radial section height. These are the ISO 15 general-plan envelope dimensions shared across manufacturers, which is why models such as 2306, 2306-E-2RS1KTN9, 2306-E-2RS1TN9 mount in the same space despite different internal designs.