MPNbase

20×47×66 mm bearings

11 models from 2 brands across 2 types share this ISO 15 envelope: 20 mm bore, 47 mm outside diameter, 66 mm width (0.787×1.850×2.598 in), 13.5 mm radial section.

11 models fit this space 2 brands 11 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)
KR-47-PPA Cam Followers SKF open CN 14.7 24.5 380
KR47-PP Cam Followers FAG 2RS CN 15.4 26 381
KRE47-PP Cam Followers FAG 2RS CN 15.4 26 400
KRV-47-PPA Cam Followers SKF open CN 19.4 41.5 390
KRV47-PP Cam Followers FAG 2RS CN 20.3 42.5 390
NUKR-47-A Cam Followers SKF open CN 28.6 33.5 380
NUKR47 Support Rollers FAG open CN 28.5 38 380
NUKRE47 Support Rollers FAG open CN 28.5 38 400
PWKR-47-2RS Cam Followers SKF open CN 22.9 24.5 380
PWKR47-2RS-XL Support Rollers FAG 2RS CN 24.6 31 380
PWKRE47-2RS-XL Support Rollers FAG 2RS CN 24.6 31 400

Note: catalogue dynamic load ratings for this envelope span 14.7– 28.6 kN — a 95% spread between designs in the very same 20×47×66 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 20 mm bore bearings for wider or narrower sections, or open a model page for naming-rule decode, applications and graded cross references: KR-47-PPA, KR47-PP, KRE47-PP, KRV-47-PPA, KRV47-PP, NUKR-47-A, NUKR47, NUKRE47, PWKR-47-2RS, PWKR47-2RS-XL, PWKRE47-2RS-XL.

Frequently asked questions

Are all 20×47×66 mm bearings interchangeable?

They share the same ISO 15 boundary dimensions — 20 mm bore, 47 mm OD, 66 mm width (0.787×1.850×2.598 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 11 models listed here and must be checked against the duty before substitution.

Is it a drop-in replacement if two bearings both measure 20×47×66?

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 20×47×66 mm in inches?

20×47×66 mm converts to 0.787×1.850×2.598 in, with a 13.5 mm (0.531 in) radial section height. These are the ISO 15 general-plan envelope dimensions shared across manufacturers, which is why models such as KR-47-PPA, KR47-PP, KRE47-PP mount in the same space despite different internal designs.