Description
Overview:
This Worm Gear is a genuine Stihl replacement part for the MS 500i and MS 500i‐W chainsaws, supplied under OEM No. 1147 640 7110. It is a precision-moulded, durable polymer gear that transfers drive from the clutch side to operate the automatic chain oil pump. By maintaining steady bar and chain lubrication, it helps the saw cut smoothly and reduces premature wear on the cutting system. Designed to Stihl specifications for a correct fit and reliable service life, it is suitable for routine maintenance or to restore oiling performance when the original gear is worn or stripped. As a genuine Stihl component, it offers dependable compatibility and performance with the intended models.
Key Features:
- Genuine Stihl part for assured compatibility and performance (OEM 1147 640 7110)
- Direct-fit replacement for the MS 500i platform; no modification required
- Robust polymer construction resists wear, heat, and oil exposure
- Accurate helical form for smooth, quiet meshing and consistent drive
- Helps restore reliable chain oil delivery, protecting bar and chain from dry running
- Stable operation supports consistent cutting performance under load
- Simple to fit during routine servicing, helping reduce downtime
- Suitable for professional and DIY upkeep where the original worm gear shows damage or wear
Typical Applications:
Used during maintenance or repair of Stihl MS 500i series saws when chain lubrication is intermittent or absent, or when the existing worm gear shows rounding, cracks, or stripping. Common in forestry, arborist work, landscaping, grounds maintenance, and firewood processing to keep the oil pump driven correctly and extend the life of the guide bar and chain.
Also known as:
Oil pump worm gear, oiler drive gear, oil pump drive gear, oiler worm, chainsaw oiling worm, pump worm.
Fits Models:
MS 500i
MS 500i-W
MS500i
Alternate Part Numbers:
1147-640-7110, 11476407110
Product Specifications
| L&S Part No. | 1147 640 7110 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11476407110 |
| Unit of Sale | 1 |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl part for MS 500i chainsaws - Direct-fit replacement, no modification needed - Durable polymer resists wear and oil exposure - Accurate helical form ensures smooth drive - Restores reliable chain oil delivery |
| Fits Models | MS500i |
