Cross-brand designation analysis
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Same-model Comparison
Explore products that share a base designation across loaded brands, with dimensional agreement and data gaps shown clearly.
Automatic candidate selection
One base designation across loaded brands
Exact designations rank first. Dimensions, suffixes and other technical differences remain visible so the result is not mistaken for an interchangeability declaration.
Designation candidates
“R188” across 2 loaded brands
One highest-ranked designation candidate is shown per manufacturer. Use Custom Compare when you want to choose exact suffix variants yourself.
Technical comparison
Choose exact variants instead →Brand differences at a glance
| Parameter | NSKR1886.35 × 12.7 × 3.175 mm | EZOR1886.35 × 12.7 × 3.175 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | NSK | EZO |
| Designation | R188 | R188 |
| Product family | Single row deep groove ball bearings | Inch-Series Ball Bearing |
| Detailed type | Deep groove ball bearings | Deep groove ball bearings |
| Bore diameterd | 6.35 mm | 6.35 mm |
| Outside diameterD | 12.7 mm | 12.7 mm |
| WidthB | 3.175 mm | 3.175 mm |
| Basic dynamic load ratingC | 1.19 kN | 1.08 kN |
| Basic static load ratingC0 | 0.44 kN | 0.438 kN |
| Mass≈m | 0.00153 kg | 0.00147 kg |
| Sealing | Open | Open (no closure suffix in this catalogue marking) |
| Bearing material | — | High-carbon chromium bearing steel |
| Boundary dimensions | ||
| Bearing width (open)B | 3.175 mm | — |
| Outer diameterD | — | 12.7 mm |
| Minimum bearing chamferr min. | 0.15 mm | — |
| Outer diameterD | — | 0.5 inch |
| Inner ring widthB | — | 3.175 mm |
| Inner ring widthB | — | 0.125 inch |
| Outer ring widthC | — | 3.175 mm |
| Outer ring widthC | — | 0.125 inch |
| Inner ring chamfer dimensionr si min | — | 0.15 mm |
| Inner ring chamfer dimensionr si min | — | 0.0059 inch |
| Outer ring chamfer dimensionr se min | — | 0.15 mm |
| Outer ring chamfer dimensionr se min | — | 0.0059 inch |
| Construction | ||
| Catalogue closure construction | Open | — |
| Closure interpretation | — | Open (no closure suffix in this catalogue marking) |
| Material interpretation | — | High-carbon chromium bearing steel |
| Load ratings | ||
| Basic dynamic radial load ratingCr | 1190 N | — |
| Basic static radial load ratingC0r | 440 N | — |
| Lubrication-qualified speed | ||
| Limiting speed with grease | 40000 r/min | — |
| Limiting speed with oil (open) | 50000 r/min | — |
| Catalogue limiting speed (grease) | — | 48000 r/min |
| Catalogue limiting speed (oil) | — | 56000 r/min |
| Mounting dimensions | ||
| Minimum shaft shoulder diameter (open)da min. | 7.6 mm | — |
| Maximum adjacent fillet radiusra max. | 0.15 mm | — |
| Maximum housing shoulder diameter (open)Da max. | 11.5 mm | — |
| Adjacent mounting dimension (da min)da min | — | 11.1 mm |
| Adjacent mounting dimension (da min)da min | — | 0.437 inch |
| Adjacent mounting dimension (da max)da max | — | 11.5 mm |
| Adjacent mounting dimension (da max)da max | — | 0.4528 inch |
| Adjacent mounting dimension (r asi max)r asi max | — | 0.15 mm |
| Adjacent mounting dimension (r asi max)r asi max | — | 0.0059 inch |
| Adjacent mounting dimension (r ase max)r ase max | — | 0.15 mm |
| Adjacent mounting dimension (r ase max)r ase max | — | 0.0059 inch |
| Reference mass | ||
| Approximate catalogue mass (open) | 1.53 g | — |
| Reference mass | — | 1.47 g |
| Rolling elements | ||
| Ball diameterDw | — | 2 mm |
| Ball quantityZ | — | 8 |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.