MPNbase

85×180×41 mm bearings

44 models from 3 brands across 5 types share this ISO 15 envelope: 85 mm bore, 180 mm outside diameter, 41 mm width (3.346×7.087×1.614 in), 47.5 mm radial section.

44 models fit this space 3 brands 44 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)
1317 Self-Aligning Ball NTN open — 98.5 38 5030
1317-K Self-Aligning Ball SKF open CN 97.5 38 5000
1317K Self-Aligning Ball NTN open — 98.5 38 5030
21317 Spherical Roller SKF open CN 331 375 5200
21317-EK Spherical Roller SKF open CN 331 375 6200
21317-NTN Spherical Roller NTN open CN 320 355 5350
21317K Spherical Roller NTN open CN 320 355 5280
317 Deep Groove Ball SKF open CN 147 146 4600
317-ZZ Deep Groove Ball SKF ZZ CN 147 146 4600
6317 Deep Groove Ball SKF open CN 140 96.5 4250
6317-2RS Deep Groove Ball SKF 2RS CN 140 96.5 4350
6317-2RS-NSK Deep Groove Ball NSK 2RS CN 146 97 4280
6317-2RS-NTN Deep Groove Ball NTN 2RS CN 147 97 4230
6317-M Deep Groove Ball SKF open CN 140 96.5 5200
6317-NSK Deep Groove Ball NSK open CN 146 97 4280
6317-NTN Deep Groove Ball NTN open CN 147 97 4230
6317-RSR Deep Groove Ball NSK RSR CN 146 97 4280
6317-RSR-NTN Deep Groove Ball NTN RSR CN 147 97 4230
6317-ZZ Deep Groove Ball SKF ZZ CN 140 96.5 4400
6317-ZZ-NSK Deep Groove Ball NSK ZZ CN 146 97 4280
6317-ZZ-NTN Deep Groove Ball NTN ZZ CN 147 97 4230
7317 Angular Contact Ball SKF open CN 146 122 4450
7317-BECBM Angular Contact Ball SKF open CN 156 132 4450
7317-BECBP Angular Contact Ball SKF open CN 156 132 4450
7317-BECBY Angular Contact Ball SKF open CN 156 132 4450
7317-BEGAPH Angular Contact Ball SKF open CN 156 132 4450
7317-BEM Angular Contact Ball SKF open CN 146 122 4450
7317-BEP Angular Contact Ball SKF open CN 146 122 4450
7317-NTN Angular Contact Ball NTN open CN 176 133 4340
7317B Angular Contact Ball NTN open CN 161 122 4430
N317 Cylindrical Roller NTN open CN 235 228 4440
N317-ECP Cylindrical Roller SKF open CN 340 335 4550
NF317 Cylindrical Roller NTN open CN 235 228 4440
NJ317 Cylindrical Roller NTN open CN 235 228 4440
NJ317-ECP Cylindrical Roller SKF open CN 340 335 4800
NJ317E Cylindrical Roller NTN open CN 325 330 —
NU317 Cylindrical Roller SKF open CN 340 335 4650
NU317-NTN Cylindrical Roller NTN open CN 235 228 4440
NU317E Cylindrical Roller NTN open CN 325 330 —
NUP317 Cylindrical Roller NTN open CN 235 228 4440
NUP317-ECP Cylindrical Roller SKF open CN 340 335 4900
NUP317E Cylindrical Roller NTN open CN 325 330 —
QJ-317-N2MA Angular Contact Ball SKF open CN 250 255 5450
QJ317 Angular Contact Ball NTN open CN 218 370 5430

Note: catalogue dynamic load ratings for this envelope span 97.5– 340.0 kN — a 249% spread between designs in the very same 85×180×41 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 85 mm bore bearings for wider or narrower sections, or open a model page for naming-rule decode, applications and graded cross references: 1317, 1317-K, 1317K, 21317, 21317-EK, 21317-NTN, 21317K, 317, 317-ZZ, 6317, 6317-2RS, 6317-2RS-NSK, 6317-2RS-NTN, 6317-M, 6317-NSK, 6317-NTN, 6317-RSR, 6317-RSR-NTN, 6317-ZZ, 6317-ZZ-NSK, 6317-ZZ-NTN, 7317, 7317-BECBM, 7317-BECBP, 7317-BECBY, 7317-BEGAPH, 7317-BEM, 7317-BEP, 7317-NTN, 7317B, N317, N317-ECP, NF317, NJ317, NJ317-ECP, NJ317E, NU317, NU317-NTN, NU317E, NUP317, NUP317-ECP, NUP317E, QJ-317-N2MA, QJ317.

Frequently asked questions

Are all 85×180×41 mm bearings interchangeable?

They share the same ISO 15 boundary dimensions — 85 mm bore, 180 mm OD, 41 mm width (3.346×7.087×1.614 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 44 models listed here and must be checked against the duty before substitution.

Is it a drop-in replacement if two bearings both measure 85×180×41?

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 85×180×41 mm in inches?

85×180×41 mm converts to 3.346×7.087×1.614 in, with a 47.5 mm (1.870 in) radial section height. These are the ISO 15 general-plan envelope dimensions shared across manufacturers, which is why models such as 1317, 1317-K, 1317K mount in the same space despite different internal designs.