Description
Overview:
The Chain Sprocket 3/8" 7T for Stihl chainsaws is a genuine replacement part designed for dependable drive of the saw chain. Built from hardened steel for high wear resistance, it transfers power from the clutch to the chain with consistent engagement. This 7-tooth sprocket suits chains with a 3/8 inch (9.53 mm) pitch and is engineered for a precise fit on popular professional models, including the Stihl 046 and MS440. It helps maintain cutting performance, reduces slippage, and supports smooth operation under continuous use. As a Genuine Stihl component, it matches original specifications for fit and function, making it suitable for routine maintenance or refurbishing a well‐used saw. Manufacturer Part Number: 1128 640 2000.
Key Features:
- Genuine Stihl part for correct fit and reliable performance
- 3/8 inch (9.53 mm) pitch, 7-tooth sprocket for efficient power transfer
- Hardened steel construction for long service life and wear resistance
- Precision-machined profile for smooth chain engagement and reduced vibration
- Helps restore cutting efficiency on heavily used saws
- Suitable for professional and DIY use in demanding conditions
- Compatible with chainsaws specified in the Fits Models section
- Easy to install during routine clutch and drive maintenance
- OEM reference: 1128 640 2000 (see Alternate Part Numbers for equivalents
- Supports standard 3/8 pitch chain loops when matched correctly
Typical Applications:
Routine replacement of a worn drive sprocket to maintain chain speed, reduce skip, and improve cut quality on forestry, arborist, site work, firewood processing, and grounds maintenance tasks. Ideal when servicing the clutch and drive system together.
Also known as:
Clutch sprocket, chain drive gear, chain wheel, 7‐tooth sprocket, 3/8‐inch chain gear, power drive gear for chainsaw.
Fits Models:
044, 046, MS 341, MS 440, MS 460, MS341, MS440, MS460
Alternate Part Numbers:
1128-640-2000, 11286402000
