NSK 633ZZ1 dimensions and catalogue data
NSK 633ZZ1 is a listed metric-series single-row deep groove ball bearing. The published dimensions are 3×13×5 mm, using bore d, outside diameter D and closed width B1.
Metal shields on both sides (ZZ1). Dynamic radial rating Cr: 1.43 kN; static radial rating C0r: 0.485 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.
- ZZ1 is retained exactly as listed. The neighbouring speed heading names ZZ, so its speed is not assigned to this ZZ1 record without separate confirmation.
Technical basis:NSK Rolling Bearings for Industrial Machinery, E1103d (2025), Part C, C058–C059; 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
Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Variant / construction | Single row deep groove ball bearings | |
| Bore diameter | d | 3 mm |
| Outside diameter | D | 13 mm |
| Width | B | 5 mm |
| Basic dynamic load rating | C | 1.43 kN |
| Basic static load rating | C0 | 0.485 kN |
| Mass | ≈m | 0.00333 kg |
| Sealing | Metal shields on both sides (ZZ1) |
Mounting dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Maximum shaft shoulder diameter (closed) | db max. | 6 mm |
| Maximum adjacent fillet radius | rb max. | 0.2 mm |
| Minimum housing shoulder diameter (closed) | Db min. | 11.3 mm |
Boundary dimensions4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 3 mm |
| Outside diameter | D | 13 mm |
| Bearing width (closed) | B1 | 5 mm |
| Minimum bearing chamfer | r1 min. | 0.2 mm |
Construction1 parameter
| Parameter | Symbol | Value |
|---|---|---|
| Catalogue closure construction | Metal shields on both sides (ZZ1) |
Load ratings2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Basic dynamic radial load rating | Cr | 1430 N |
| Basic static radial load rating | C0r | 485 N |
Reference mass1 parameter
| Parameter | Symbol | Value |
|---|---|---|
| Approximate catalogue mass (shield) | 3.33 g |