Description
Overview:
This Chain Sprocket is a Genuine Stihl OEM drive component for heavy-duty chainsaws using 0.404 inch (10.26 mm) pitch chain. With 7 teeth, it transfers engine power to the chain for smooth, consistent cutting. Built from hardened steel for strength and wear resistance, it is engineered to handle the high loads of large-capacity saws. It is intended as a direct replacement to restore performance when the original sprocket is worn, reducing chain slip and uneven wear. Designed for Stihl professional models, it offers the correct fit and alignment for reliable running, particularly on the Stihl 084 and 088. Manufacturer Part Number (MPN) 1124 640 2005 confirms compatibility and ensures the sprocket mates correctly with matching 0.404 inch (10.26 mm) pitch chain.
Key Features:
- Genuine Stihl OEM part for assured fit and compatibility (MPN 1124 640 2005).
- 0.404 inch (10.26 mm) pitch with 7 teeth for correct chain engagement and drive.
- Hardened steel construction for durability under continuous professional use.
- Precision-machined profile helps reduce vibration and promote smooth chain tracking.
- Helps extend bar and chain life by maintaining correct alignment and drive speed.
- Straightforward replacement for a worn sprocket to restore cutting efficiency.
- Suitable for demanding applications on high-power saws such as 084/088 and MS 780/MS 880.
- Reliable performance in heavy timber work where high torque is required.
Typical Applications:
Used on professional and large-frame chainsaws for felling, cross-cutting, and bucking big timber. Suitable for site clearance, forestry, sawmill preparation, and milling setups that specify a 0.404 inch (10.26 mm) pitch system. Ideal when refurbishing a powerhead to maintain consistent chain speed and reduce premature wear on the cutting system.
Also known as:
Drive sprocket, chain drive wheel, chain drive gear, drive cog, 7-tooth 0.404 pitch sprocket, chainsaw drive gear. Commonly referenced when servicing the clutch-side drive system to ensure the chain engages correctly with the powerhead.
Fits Models:
084, 088, MS 780, MS 880, MS780, MS880
Alternate Part Numbers:
1124-640-2005, 11246402005
