Industrial replacement referenceSource-backed records · No compatibility guesswork

JTEKT/Koyo deep groove ball bearing · Shielded ZZ

6704 ZZ

Manufacturer-published boundary dimensions, basic load ratings, fatigue limit, and f0 factor.

Bore d20 mmOutside diameter D27 mmWidth B4 mmDynamic rating Cr1.3 kNKoyo calculation tool ↗

Live manufacturer specification row

Published specifications

JTEKT/Koyo
Designation
6704 ZZ
Classification
Shielded ZZ
Bore d
20 mm
Outside diameter D
27 mm
Width B
4 mm
Minimum corner radius r
0.2 mm
Basic dynamic load rating Cr
1.3 kN
Basic static load rating C0r
0.73 kN
Fatigue load limit Cu
0.03 kN
Factor f0
16.1
Published row text
6704 ZZ | 20 | 27 | 4 | 0.2 | 1.3 | 0.73 | 0.03 | 16.1

Verification boundary

What still needs to match

Do not infer interchange
Designation and sealingConfirm the complete bearing number and exact shield/seal construction.
Fit and geometryVerify shaft/housing fits, shoulders, fillets, internal clearance, and installation constraints.
DutyCheck speed, temperature, lubrication, contamination, load direction, and required life.
Current manufacturer dataUse the linked JTEKT/Koyo calculation tool and current catalog before ordering.

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