NU308EW

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

Bore d40 mmOutside diameter D90 mmWidth B23 mmDynamic rating Cr102,000 NNSK product page ↗

Live manufacturer catalog row

Published specifications

NSK online catalog

Designation: NU308EW
Bore d: 40 mm
Outside diameter D: 90 mm
Width B: 23 mm
Minimum corner radius r: 1.5 mm
Minimum corner radius r1: 1.5 mm
Fw: 52 mm
Ew: Not applicable / not published
Basic dynamic load rating Cr: 102,000 N
Basic static load rating C0r: 81,500 N
Thermal speed rating — oil bath: 7,500 rpm
Mechanical speed — forced oil: 12,000 rpm
Limiting speed — grease: 6,700 rpm
Limiting speed — oil: 8,000 rpm
Published row text: NU308EW | 40 | 90 | 23 | 1.5 | 1.5 | 52 | | 102000 | 81500 | 7500 | 12000 | 6700 | 8000

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.

Related NSK bearings