NJ304ET

Manufacturer-published dimensions, load ratings, thermal speed rating, and limiting speeds.

Bore d20 mmOutside diameter D52 mmWidth B15 mmDynamic rating Cr39,000 NNSK product page ↗

Live manufacturer catalog row

Published specifications

NSK online catalog

Designation: NJ304ET
Bore d: 20 mm
Outside diameter D: 52 mm
Width B: 15 mm
Minimum corner radius r: 1.1 mm
Minimum corner radius r1: 0.6 mm
Fw: 27.5 mm
Ew: Not applicable / not published
Basic dynamic load rating Cr: 39,000 N
Basic static load rating C0r: 26,900 N
Thermal speed rating — oil bath: 13,000 rpm
Mechanical speed — forced oil: 18,000 rpm
Limiting speed — grease: 12,000 rpm
Limiting speed — oil: 15,000 rpm
Published row text: NJ304ET | 20 | 52 | 15 | 1.1 | 0.6 | 27.5 | | 39000 | 26900 | 13000 | 18000 | 12000 | 15000

Verification boundary

Do not infer interchange

Bearing designConfirm N/NU/NJ/NUP/NF flange arrangement and exact suffixes.

Fit and clearanceVerify shaft/housing tolerances, internal clearance, shoulders, fillets, and mounting method.

DutyCheck speed, lubrication, temperature, radial/axial load handling, contamination, and required life.

Current product dataConfirm the exact designation on the linked NSK product page before ordering.

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