Description
Overview:
This 3/8 inch (9.53 mm) pitch, 7-tooth Chain Sprocket is a genuine Stihl OEM drive component for petrol chainsaws, built to deliver reliable power transfer from the clutch to the chain. Manufactured from durable steel for long service life, it helps maintain correct chain speed and alignment, supporting clean, efficient cutting. It is a direct replacement for worn or hooked sprockets on popular mid-range models such as the Stihl MS290 and MS390. Replacing a tired sprocket protects your bar and chain from premature wear, restores cutting performance, and keeps your saw running smoothly. Suitable for trade users, estate teams, arborists, and home users who want consistent results and dependable fitment on compatible Stihl machines.
Key Features:
- Genuine Stihl OEM part for correct fit and reliable performance on compatible models
- 3/8 inch (9.53 mm) pitch with 7 teeth to match standard 3/8 chains used on mid-size saws
- Robust steel construction for wear resistance under regular and heavy use
- Accurate machining for smooth chain engagement and consistent chain speed
- Helps reduce vibration and chain skip when the rest of the cutting system is in good condition
- Straightforward to fit during routine maintenance with standard workshop tools
- Ideal replacement when teeth are hooked or the sprocket shows groove wear, protecting bar and chain
- Suited to both professional and DIY users seeking dependable, cost-effective maintenance
- Compatible with Stihl's 3/8 pitch drive systems; always verify chain pitch before ordering
Typical Applications:
Used during scheduled servicing or when drive components show wear on chainsaws used for felling, logging, firewood processing, site clearance, hedgerow management, and general grounds maintenance. Restores cutting efficiency and helps extend the working life of the chain and guide bar.
Also known as:
Drive sprocket, chain drive gear, sprocket gear, 7T 3/8 sprocket, chainsaw sprocket, powerhead drive gear.
Fits Models:
029, 030, 031, 034, 036, 039, MS 290, MS 310, MS 340, MS 360, MS 360 C, MS 390
Alternate Part Numbers:
1125 640 2000, 1125-640-2000, 1125-640-2004, 11256402004, 11256402000
Product Specifications
| L&S Part No. | 1125 640 2004 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11256402004 |
| Unit of Sale | 1 |
| Applications | 029, 030, 031, 034, 036, 039, MS 290, MS 310, MS 340, MS 360, MS 360 C, MS 390, MS290, MS310, MS340, MS360, MS360C, MS390 |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Fits Models | MS290, MS310, MS390 | 030, 031 | 029, 039 | MS340 | MS360, MS360C | 034 | 036 |
