N311W

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

Bore d55 mmOutside diameter D120 mmWidth B29 mmDynamic rating Cr136,000 NNSK product page ↗

Live manufacturer catalog row

Published specifications

NSK online catalog

Designation: N311W
Bore d: 55 mm
Outside diameter D: 120 mm
Width B: 29 mm
Minimum corner radius r: 2 mm
Minimum corner radius r1: 2 mm
Fw: Not applicable / not published
Ew: 104.5 mm
Basic dynamic load rating Cr: 136,000 N
Basic static load rating C0r: 111,000 N
Thermal speed rating — oil bath: 6,300 rpm
Mechanical speed — forced oil: Not published
Limiting speed — grease: 4,000 rpm
Limiting speed — oil: 5,000 rpm
Published row text: N311W | 55 | 120 | 29 | 2 | 2 | | 104.5 | 136000 | 111000 | 6300 | | 4000 | 5000

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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