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B17-102AT1XDDG3*W-01
NSK
Product Description
The NSK B17-102 is a single-row deep groove ball bearing manufactured by NSK, a leading Japanese bearing company. This bearing is commonly used in automotive applications, such as alternators (generators), tensioner pulleys, idler pulleys, or other automotive rotating components. It is a specialized (non-standard catalog size) variant, often appearing with suffixes like DG48, AT1XDDG, A-1T1XDDG03, AT1XDDG3*W-01, etc., which indicate specific internal clearances, seals/shields, grease types, or minor design tweaks for particular OEM uses.
Inner diameter (bore, d): 17 mm
Outer diameter (D): 47 mm
Width (B): 14 mm
These dimensions match a standard 6303-series bearing in size (6303 is 17x47x14 mm), but the B17-102 is an NSK-specific designation, often with tailored features for automotive or high-speed applications.
Type: Deep groove ball bearing, single row, no filling slot
Bore type: Cylindrical (straight)
Closure/Seals: Often open (no seals), but variants exist with shields (e.g., DDG indicates double shields) or seals depending on the exact suffix (e.g., some automotive versions are sealed or shielded for protection against contaminants)
Internal clearance: Usually C0 (normal/medium), though some variants may have C3 (greater clearance) for higher temperatures or speeds
Cage material: Steel (standard cage)
Load direction: Primarily radial (can handle some axial loads due to deep groove design)
Weight: Approximately 0.118 kg
This bearing is versatile, with low friction and suitability for high-speed rotation.
It is frequently listed as an "automobile generator bearing" or alternator bearing in parts catalogs and aftermarket suppliers.
Equivalent or similar standard bearing: Often interchangeable with or compared to a 6303 series in dimensions, but the B17-102 may have specific NSK optimizations (e.g., special grease, clearance, or surface treatments) for durability in automotive environments.
Here is a compiled table of compatible vehicles for the NSK B17-102 bearing (and its common variants like B17-102DG48, B17-102DG46, B17-102DG36, B17-102-A-1T1XDDG03, B17-102AT1XDDG3*W-01, etc.). This bearing is primarily used as a drive-end alternator bearing in various vehicles, often in Bosch or similar alternators. Compatibility depends on the exact alternator model and bearing suffix—always verify with your vehicle's alternator part number or a parts catalog for precise fit.
The information is aggregated from supplier listings, cross-references, and automotive parts sources (e.g., Nissan Primera, Opel Astra, and some Japanese/European models with matching 17x47x14 mm alternator bearings).
Brand | Model | Common Years | Notes / Application |
|---|---|---|---|
Nissan | Primera (P11/P12 series, including Sport Plus) | 1990s–2010s (varies by region) | Alternator drive end; common with Bosch alternators (e.g., 1120905502) |
Opel / Vauxhall | Astra (various generations) | 1990s–2010s (e.g., Astra G/H) | Alternator bearing; listed as compatible in aftermarket parts |
Nissan | Various models with Bosch alternators | 1990s–2000s | General fit for Nissan alternators using this size |
Honda | Civic (some K-series models) | 2006–2011 (approx.) | Drive-end alternator (variant B17-102DG46 mentioned) |
Nissan | Altima (late models) | 2005–2015 (approx.) | Functional interchange in some applications (variant B17-102DG46) |
Various (Japanese brands) | Toyota, Honda, Mitsubishi, etc. (select older models) | 1990s–2010s | Common in alternators for Japanese vehicles; exact match depends on OEM alternator |
Mercedes-Benz | Various older models (e.g., 250C reference in listings) | 1970s (e.g., 1971–1972) | Mentioned in some alternator bearing sales, but less common—verify alternator |
