At a glance
NACHI
Collect the full designation, dimensions, ratings, closure, clearance and precision information for the exact NACHI product.
Select only when that product's documented specification fits the shaft, housing and operating duty.
NTN
Collect the corresponding complete NTN product record and check its manufacturer-specific suffix definitions.
Select after verifying the same dimensional, loading, lubrication and accuracy requirements.
Key differences
Typical design distinctions. The complete designation and current product specification take precedence.
Swipe the table horizontally to see both options →
| What to compare | NACHI | NTN |
|---|---|---|
| Model identity | Complete NACHI marking and variant | Complete NTN marking and variant |
| Dimensions | Verified d, D and B or assembled width | Verified matching dimensional scope |
| Ratings | Verified C, C0 and speed conditions | Comparable units and speed conditions |
| Closure | Contact type and grease specification | Contact type and grease specification |
| Clearance / accuracy | Keep both as separate fields | Keep both as separate fields |
| Coverage | Use only records actually loaded | Missing entries are not an inferred equivalence |
Before you choose
- Check the live coverage cards before expecting a two-column product result.
- The same basic number can contain different seals, cage materials or lubricant fills.
- Do not use a third brand's values to fill either manufacturer's missing technical fields.
Check the actual model
Search a full designation, inspect its technical data, then compare candidate records. Similar names or dimensions do not guarantee interchangeability.
Coverage is the current BearingScope dataset, not a manufacturer's complete range. Missing fields and missing brands are not treated as equivalent.
Filters show recorded catalogue attributes. Open each candidate to confirm its exact specification.
A few things worth clarifying
Why is there no automatic NACHI/NTN comparison for some models?
At least one verified record may be missing from this site's current data. No numerical comparison is generated from guessed values.
What is needed to add a valid comparison?
The complete manufacturer records, comparable units and compatible dimensions, followed by checks of suffix and application differences.
Reference basis & limits
- NACHI — Ball & Roller Bearings catalogue, No. B2100E-4
- NTN — Rolling bearings technical catalogue, No. 2203
Independent explanatory content; not a manufacturer endorsement or approval of a replacement. Verify current product data, fits, lubrication and operating conditions before applying a comparison.