Description
Overview:
The Grooved Ball Bearing 6203 is a single‐row deep‐groove bearing for Stihl professional chainsaws, including the 066 and MS640. As a Genuine Stihl OEM part (Stihl part number 9503 003 6676), it is built from hardened bearing steel for strength, precision and long service life. Its deep‐groove design handles radial loads with additional axial support, helping rotating assemblies run smoothly at high speed. Commonly used around the crankshaft and related drive components, it helps reduce friction, stabilise alignment and maintain correct clearances under load. The standard 6203 form factor makes identification straightforward while ensuring reliable fit in specified models. Choose this bearing when refurbishing engines, restoring performance after wear, or carrying out preventative maintenance on demanding saws used daily.
Key Features:
- Genuine Stihl OEM part for assured compatibility and reliability
- Deep‐groove (6203) geometry for smooth running and balanced load distribution
- Hardened steel races and balls for durability under continuous high‐speed use
- Precision tolerances support crankshaft and drive components with reduced vibration
- Standard 6203 dimensions (17 mm × 40 mm × 12 mm) for easy identification and selection
- Supports both radial and moderate axial loads typical in chainsaw applications
- Stable performance in dusty, high‐impact environments when installed with clean seats and correct seals
- Ideal as a like‐for‐like replacement during engine rebuilds or routine servicing
Typical Applications:
Used in engine and drive assemblies of Stihl chainsaws to support rotating shafts such as crankshafts and clutch or flywheel ends. Suitable for restoring smooth rotation, reducing friction, and maintaining correct alignment after wear. Common during full rebuilds, preventative maintenance, or when noise, play, or heat indicates bearing deterioration in professional and heavy‐duty cutting work.
Also known as:
Deep‐groove ball bearing, 6203 metric bearing, single‐row ball bearing, chainsaw crank bearing, engine shaft bearing, 17 × 40 × 12 bearing, rotating assembly bearing.
Fits Models:
064, 066, 084, 088, MS 640, MS 650, MS 660, MS 780, MS 880, MS 881, MS640, MS650, MS660, MS780, MS880, MS881
Alternate Part Numbers:
9503 003 6675, 9503-003-6676, 95030036675, 95030036676
Product Specifications
| L&S Part No. | 9503 003 6676 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 95030036676 |
| Unit of Sale | 1 |
| Applications | 064, 066, 084, 088, MS 640, MS 650, MS 660, MS 780, MS 880, MS 881, MS640, MS650, MS660, MS780, MS880, MS881 |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Fits Models | MS640 | MS650 | MS660 | MS780 | MS880 | 064 | 084 | 088 | 066 | MS881 |
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