MPNbase

30×72×19 mm bearings

48 models from 4 brands across 5 types share this ISO 15 envelope: 30 mm bore, 72 mm outside diameter, 19 mm width (1.181×2.835×0.748 in), 21 mm radial section.

48 models fit this space 4 brands 48 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)
1306 Self-Aligning Ball NTN open — 21.4 6.3 391
1306-EKTN9 Self-Aligning Ball SKF open CN 22.5 6.8 390
1306-ETN9 Self-Aligning Ball SKF open CN 22.5 6.8 390
1306K Self-Aligning Ball NTN open — 21.4 6.3 391
1726306-2RS1 Insert (Y-bearings) SKF 2RS CN 28.1 16 340
306 Deep Groove Ball SKF open CN 29.7 21.6 370
306-ZZ Deep Groove Ball SKF ZZ CN 29.7 21.6 370
6306 Deep Groove Ball SKF open CN 29.6 16 350
6306-2RS Deep Groove Ball SKF 2RS CN 29.6 16 350
6306-2RS-FAG Deep Groove Ball FAG 2RS CN 32 16.2 343
6306-2RS-NSK Deep Groove Ball NSK 2RS CN 29.3 15 345
6306-2RS-NTN Deep Groove Ball NTN 2RS CN 29.5 15 360
6306-FAG Deep Groove Ball FAG open CN 32 16.2 328
6306-NSK Deep Groove Ball NSK open CN 29.3 15 345
6306-NTN Deep Groove Ball NTN open CN 29.5 15 360
6306-RSR Deep Groove Ball SKF RSR CN 29.6 16 360
6306-RSR-NSK Deep Groove Ball NSK RSR CN 29.3 15 345
6306-RSR-NTN Deep Groove Ball NTN RSR CN 29.5 15 360
6306-ZZ Deep Groove Ball SKF ZZ CN 29.6 16 360
6306-ZZ-FAG Deep Groove Ball FAG ZZ CN 32 16.2 345
6306-ZZ-NSK Deep Groove Ball NSK ZZ CN 29.3 15 345
6306-ZZ-NTN Deep Groove Ball NTN ZZ CN 29.5 15 360
7306 Angular Contact Ball SKF open CN 32.5 19.3 340
7306-ACCBM Angular Contact Ball SKF open CN 39 23.6 340
7306-BE-2RZP Angular Contact Ball SKF RSR CN 32.5 19.3 350
7306-BECBM Angular Contact Ball SKF open CN 35.5 21.2 340
7306-BECBP Angular Contact Ball SKF open CN 35.5 21.2 340
7306-BECBY Angular Contact Ball SKF open CN 37.5 23.2 340
7306-BEGAPH Angular Contact Ball SKF open CN 35.5 21.2 340
7306-BEP Angular Contact Ball SKF open CN 32.5 19.3 340
7306-NTN Angular Contact Ball NTN open CN 37.5 22.3 345
7306B Angular Contact Ball NTN open CN 34 20.5 352
N306-ECP Cylindrical Roller SKF open CN 58.5 48 360
N306EA Cylindrical Roller NTN open CN 63 50 353
NF306EA Cylindrical Roller NTN open CN 63 50 353
NJ306-ECP Cylindrical Roller SKF open CN 58.5 48 370
NJ306EA Cylindrical Roller NTN open CN 63 50 353
NU306 Cylindrical Roller SKF open CN 58.5 48 360
NU306EA Cylindrical Roller NTN open CN 63 50 353
NUP306-ECP Cylindrical Roller SKF open CN 58.5 48 380
NUP306EA Cylindrical Roller NTN open CN 63 50 353
QJ-306-MA Angular Contact Ball SKF open CN 53 41.5 420
QJ-306-N2MA Angular Contact Ball SKF open CN 53 41.5 420
QJ-306-N2PHAS Angular Contact Ball SKF open CN 53 41.5 420
QJ306 Angular Contact Ball NTN open CN 44 57.5 420
W6306 Deep Groove Ball SKF open CN 22.9 15 331
W6306-2RS Deep Groove Ball SKF 2RS CN 22.9 15 346
W6306-ZZ Deep Groove Ball SKF ZZ CN 22.9 15 345

Note: catalogue dynamic load ratings for this envelope span 21.4– 63.0 kN — a 194% spread between designs in the very same 30×72×19 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: 1306, 1306-EKTN9, 1306-ETN9, 1306K, 1726306-2RS1, 306, 306-ZZ, 6306, 6306-2RS, 6306-2RS-FAG, 6306-2RS-NSK, 6306-2RS-NTN, 6306-FAG, 6306-NSK, 6306-NTN, 6306-RSR, 6306-RSR-NSK, 6306-RSR-NTN, 6306-ZZ, 6306-ZZ-FAG, 6306-ZZ-NSK, 6306-ZZ-NTN, 7306, 7306-ACCBM, 7306-BE-2RZP, 7306-BECBM, 7306-BECBP, 7306-BECBY, 7306-BEGAPH, 7306-BEP, 7306-NTN, 7306B, N306-ECP, N306EA, NF306EA, NJ306-ECP, NJ306EA, NU306, NU306EA, NUP306-ECP, NUP306EA, QJ-306-MA, QJ-306-N2MA, QJ-306-N2PHAS, QJ306, W6306, W6306-2RS, W6306-ZZ.

Frequently asked questions

Are all 30×72×19 mm bearings interchangeable?

They share the same ISO 15 boundary dimensions — 30 mm bore, 72 mm OD, 19 mm width (1.181×2.835×0.748 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 48 models listed here and must be checked against the duty before substitution.

Is it a drop-in replacement if two bearings both measure 30×72×19?

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 30×72×19 mm in inches?

30×72×19 mm converts to 1.181×2.835×0.748 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 1306, 1306-EKTN9, 1306-ETN9 mount in the same space despite different internal designs.