NSK F684 dimensions and catalogue data
NSK F684 is a listed metric-series single-row deep groove ball bearing. The published dimensions are 4×9×2.5 mm, using bore d, body outside diameter D and open width B.
Open. Dynamic radial rating Cr: 0.705 kN; static radial rating C0r: 0.225 kN.
How to use this model record
- This is an independently organised catalogue reference, not an installation drawing or approval for a machine or vehicle.
- Compare the complete designation. B and B1 may differ between open and closed versions; a related base number does not establish the same width.
- Load ratings are calculation inputs, not universal permissible loads. Limiting speed depends on the stated closure, lubrication and application conditions.
- Shaft-shoulder and housing-shoulder values describe adjacent mounting geometry. Preserve the min./max. direction; they are not alternative bearing diameters.
- Precision class, radial internal clearance, grease specification, material grade and fitment are not established by this table. Missing values are not zero.
- A rotating outer ring requires a manufacturer application check for shielded or sealed constructions.
- The flange diameter D1 is 10.3 mm and flange width C1 is 0.6 mm. The flange envelope is larger than body diameter D.
- The source places this chamfer value in parentheses and states that parenthesised values are not based on ISO 15.
Technical basis:NSK Rolling Bearings for Industrial Machinery, E1103d (2025), Part C, C062–C063; source checked 2026-10-01. Manufacturer facts are reorganised for model lookup and comparison; no manufacturer document is republished.
Search bearing dimensions·Load calculation·NSK model records