Description
Overview:
The Chain Sprocket 3/8" Picco 6T is a genuine Stihl replacement part for small Stihl chainsaws such as the MS 170 and MS 180. Made from robust steel, it drives the saw chain and keeps it running smoothly around the guide bar. Specified for 3/8 inch (9.5 mm) low‐profile Picco chains with 6 teeth, it ensures precise engagement and stable chain tracking under load. As a direct OEM component (Stihl 1123 640 2003), it restores correct chain speed and alignment when your original sprocket is worn. Suitable for both trades and home users, it supports reliable cutting performance in general pruning, logging, and firewood work while helping to protect the bar and chain from premature wear.
Key Features:
- Genuine Stihl OEM part for assured fit and compatibility (1123 640 2003)
- 3/8" (9.5 mm) Picco, 6‐tooth drive for accurate chain engagement
- Steel construction for durability and long service life
- Helps maintain smooth chain movement and consistent cutting performance
- Direct replacement to resolve skipping, binding, or uneven chain wear
- Straightforward fitting during routine servicing with standard workshop tools
- Suitable for professional and DIY use across a wide range of cutting tasks
- Supports correct chain alignment to reduce wear on bar, chain, and drive system
Typical Applications:
Used when replacing a worn or damaged drive sprocket on compatible Stihl chainsaws. Common during routine servicing, after chain or bar replacement, or if symptoms such as chain chatter, slip, or uneven wear appear. Helps restore efficient cutting for pruning, yard maintenance, light felling, and firewood processing.
Also known as:
Drive sprocket, chainsaw sprocket, clutch sprocket, chain drive gear, 3/8" Picco 6T sprocket, LP 3/8 (9.5 mm) sprocket.
Fits Models:
017, 018, 019 T, 019T, MS 170, MS 170 C, MS 180, MS 180 C, MS 190 T, MS 191 T, MS170, MS170C, MS180, MS180C, MS190T, MS191T
Alternate Part Numbers:
1123-640-2003, 11236402003
Product Specifications
| L&S Part No. | 1123 640 2003 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11236402003 |
| Unit of Sale | 1 |
| Size | 3/8" Picco 6T |
| Applications | 017, 018, 019 T, 019T, MS 170, MS 170 C, MS 180, MS 180 C, MS 190 T, MS 191 T, MS170, MS170C, MS180, MS180C, MS190T, MS191T |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Fits Models | MS170, MS170C | MS180, MS180C | 017 | 018 | 019T | MS190T | MS191T |
