Description
Overview:
The Chain Sprocket 3/8'' 7T for Stihl chainsaws is a Genuine Stihl OEM part designed to maintain smooth, efficient chain drive on the MS 311 and MS 391. Manufactured from durable steel to handle high torque and continuous use, it transfers power from the clutch to the chain with the correct pitch and alignment. The 3/8'' (9.525 mm) pitch with 7 teeth delivers precise engagement, helping to reduce chain chatter and premature wear to the bar and chain. It is a like-for-like replacement for worn or damaged sprockets, restoring performance and reliability. Ideal for regular servicing, this component supports safe cutting and consistent output in forestry, landscaping, and property maintenance.
Key Features:
- Genuine Stihl OEM part for assured fit and compatibility
- 3/8'' (9.525 mm) pitch, 7-tooth profile for accurate chain engagement
- Robust steel construction for long service life under demanding loads
- Helps protect bars and chains by maintaining correct drive alignment
- Direct replacement for tired sprockets to restore cutting efficiency
- Stable power transfer for smoother operation and reduced vibration
- Straightforward swap during routine maintenance with basic tools
- Suitable for professional and DIY users seeking dependable performance
Typical Applications:
Regular replacement to keep the drive system in good order on mid-size Stihl saws. Well suited to tasks such as felling small to medium timber, logging, firewood processing, storm clearance, fencing, and grounds maintenance where reliable chain drive and consistent cutting speed are essential.
Also known as:
Often referred to as a rim sprocket, chain drive wheel, chain drive rim, or drive wheel. Some users also call it a chain transmission sprocket or chain drive hub, reflecting its role in transferring power from the clutch to the cutting chain.
Fits Models:
MS 311, MS 391, MS311, MS391
Alternate Part Numbers:
1140-640-2000, 11406402000
