NF309M

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

Bore d45 mmOutside diameter D100 mmWidth B25 mmDynamic rating Cr97,000 NNSK product page ↗

Live manufacturer catalog row

Published specifications

NSK online catalog

Designation: NF309M
Bore d: 45 mm
Outside diameter D: 100 mm
Width B: 25 mm
Minimum corner radius r: 1.5 mm
Minimum corner radius r1: 1.5 mm
Fw: Not applicable / not published
Ew: 86.5 mm
Basic dynamic load rating Cr: 97,000 N
Basic static load rating C0r: 77,500 N
Thermal speed rating — oil bath: 7,500 rpm
Mechanical speed — forced oil: Not published
Limiting speed — grease: 6,300 rpm
Limiting speed — oil: 7,500 rpm
Published row text: NF309M | 45 | 100 | 25 | 1.5 | 1.5 | | 86.5 | 97000 | 77500 | 7500 | | 6300 | 7500

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