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CUSTOM / 08 MAX
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| Parameter | NSKMR844 × 8 × 2 mm | EZOMR84ZZ4 × 8 × 3 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | NSK | EZO |
| Designation | MR84 | MR84ZZ |
| Product family | Single row deep groove ball bearings | Miniature Ball Bearing |
| Detailed type | Deep groove ball bearings | Deep groove ball bearings |
| Bore diameterd | 4 mm | 4 mm |
| Outside diameterD | 8 mm | 8 mm |
| WidthB | 2 mm | 3 mm |
| Basic dynamic load ratingC | 0.435 kN | 0.395 kN |
| Basic static load ratingC0 | 0.139 kN | 0.14 kN |
| Mass≈m | 0.00036 kg | 0.00051 kg |
| Sealing | Open | Two pressed-steel shields |
| Bearing material | — | High-carbon chromium bearing steel |
| Boundary dimensions | ||
| Bearing width (open)B | 2 mm | — |
| Outer diameterD | — | 8 mm |
| Minimum bearing chamferr min. | 0.15 mm | — |
| Outer diameterD | — | 0.315 inch |
| Inner ring widthB | — | 3 mm |
| Inner ring widthB | — | 0.1181 inch |
| Outer ring widthC | — | 3 mm |
| Outer ring widthC | — | 0.1181 inch |
| Inner ring chamfer dimensionr si min | — | 0.1 mm |
| Inner ring chamfer dimensionr si min | — | 0.0039 inch |
| Outer ring chamfer dimensionr se min | — | 0.1 mm |
| Outer ring chamfer dimensionr se min | — | 0.0039 inch |
| Construction | ||
| Catalogue closure construction | Open | — |
| Closure interpretation | — | Two pressed-steel shields |
| Material interpretation | — | High-carbon chromium bearing steel |
| Load ratings | ||
| Basic dynamic radial load ratingCr | 435 N | — |
| Basic static radial load ratingC0r | 139 N | — |
| Lubrication-qualified speed | ||
| Limiting speed with grease | 56000 r/min | — |
| Limiting speed with oil (open) | 67000 r/min | — |
| Catalogue limiting speed (grease) | — | 67000 r/min |
| Catalogue limiting speed (oil) | — | 79000 r/min |
| Mounting dimensions | ||
| Minimum shaft shoulder diameter (open)da min. | 5.2 mm | — |
| Maximum adjacent fillet radiusra max. | 0.15 mm | — |
| Maximum housing shoulder diameter (open)Da max. | 6.8 mm | — |
| Adjacent mounting dimension (da min)da min | — | 7.5 mm |
| Adjacent mounting dimension (da min)da min | — | 0.2953 inch |
| Adjacent mounting dimension (da max)da max | — | 7.5 mm |
| Adjacent mounting dimension (da max)da max | — | 0.2953 inch |
| Adjacent mounting dimension (r asi max)r asi max | — | 0.1 mm |
| Adjacent mounting dimension (r asi max)r asi max | — | 0.0039 inch |
| Adjacent mounting dimension (r ase max)r ase max | — | 0.1 mm |
| Adjacent mounting dimension (r ase max)r ase max | — | 0.0039 inch |
| Reference mass | ||
| Approximate catalogue mass (open) | 0.36 g | — |
| Reference mass | — | 0.51 g |
| Rolling elements | ||
| Ball diameterDw | — | 1.2 mm |
| Ball quantityZ | — | 7 |
Independent reference comparison based on the manufacturer data currently loaded. Always verify current limits, tolerances and suffix definitions with the official source before engineering selection.