Description
Overview:
The Chain Sprocket 0.325'' 7T is a genuine Stihl replacement part for mid-size petrol chainsaws, built to restore smooth, accurate chain drive. Made from durable steel, it is engineered for consistent power transfer and long service life in regular cutting work. The 0.325 inch (8.26 mm) pitch and 7-tooth profile give precise chain engagement, helping reduce vibration and wear when matched to the correct chain. Designed for Stihl machines such as the MS 241 C and MS 231, it is suitable for both professional users and DIY owners who want reliable, predictable performance. Supplied to OEM specification (OEM No. 1143 640 2002), it fits correctly without modification and is a straightforward swap for a worn or damaged sprocket.
Key Features:
- Genuine Stihl part for assured compatibility and build quality
- 0.325 inch (8.26 mm) pitch, 7-tooth design for accurate chain engagement
- Steel construction for durability under frequent cutting loads
- Maintains smooth chain movement to support clean, efficient cutting
- Helps protect bar and chain by reducing slippage and uneven wear
- Direct-fit replacement to OEM No. 1143 640 2002 for quick installation
- Suitable for routine maintenance schedules to keep performance consistent
- Reliable in typical site, forestry, and garden workloads
- Compatible with specified Stihl models to avoid guesswork
Typical Applications:
Replacing a worn or hooked drive sprocket to restore correct chain tracking and cutting efficiency. Useful after high hours of use, visible tooth wear, or when fitting a new bar and chain set. Suitable for general property maintenance, landscaping, firewood processing, pruning, and light forestry work where dependable chain drive is essential.
Also known as:
Drive sprocket, chainsaw drive gear, chain drive wheel, sprocket wheel, chainsaw sprocket gear. Commonly referred to as a 0.325 inch (8.26 mm) 7T sprocket for Stihl mid-range saws.
Fits Models:
MS 231, MS 231 C, MS 241 C, MS 251, MS 251 C
Alternate Part Numbers:
1143-640-2002, 11436402002
Product Specifications
| L&S Part No. | 1143 640 2002 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11436402002 |
| Unit of Sale | 1 |
| Applications | MS 231, MS 231 C, MS 241 C, MS 251, MS 251 C, MS231, MS231C, MS241C, MS251, MS251C |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Fits Models | MS231, MS251 | MS241C |
