Description
Overview:
This genuine Husqvarna chain tensioning screw (MPN 537 39 29‐01 / 537392901) is a precision component for side chain adjustment on selected Husqvarna petrol chainsaws. Made from durable steel for long service life, it forms the heart of the bar/chain adjuster mechanism, allowing controlled movement of the guide bar to set correct chain slack. Correct tension helps reduce kickback risk, limits bar and sprocket wear, and improves cutting performance. Designed for a precise OEM fit, it is suitable for popular models such as the Husqvarna 435e and 135. Ideal as a direct replacement for a worn, stripped, or seized adjuster screw, it restores smooth and repeatable chain tensioning as part of routine maintenance or a clutch cover rebuild.
Key Features:
- Genuine Husqvarna OEM part for assured compatibility and reliability
- Precision-machined screw thread for fine, repeatable tension adjustment
- Durable steel construction to withstand load, vibration, and frequent use
- Helps maintain correct chain slack for safer, smoother cutting
- Supports even bar wear and extends chain, bar, and sprocket life when used correctly
- Direct-fit replacement for quick maintenance with no modifications
- Stable adjustment action that resists backing off during operation
- Suitable for a wide range of mid-size Husqvarna homeowner and ranch chainsaws
Typical Applications:
Used during chain and bar maintenance to set correct tension after sharpening, replacing the chain, or refitting the bar and clutch cover. Ideal for repairing a worn adjuster that no longer holds or turns smoothly. Suitable for forestry tasks, landscaping, firewood processing, and general property maintenance where dependable and accurate chain tensioning is required.
Also known as:
Bar tension screw, chain tension adjuster bolt, guide bar adjust screw, side chain adjust screw, chain bar adjuster, chain adjust worm screw, tensioning worm, bar adjuster screw.
Fits Models:
135, 135E, 140E, 340, 340E, 345, 345E, 345E TrioBrake, 350, 435, 435E, 435EII, 435II, 440E, 440EII, 440II, 445E, 445E TrioBrake, 445EII, 445II, 450EII, 455E, 455E Rancher II, 455E TrioBrake
Product Specifications
| L&S Part No. | 537 39 29 01 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 537392901 |
| Unit of Sale | 1 |
| Applications | 135, 135E, 140E, 340, 340E, 345, 345E, 345E TrioBrake, 350, 435, 435E, 435EII, 435II, 440E, 440EII, 440II, 445E, 445E TrioBrake, 445EII, 445II, 450EII, 455E, 455E Rancher II, 455E TrioBrake |
| Machine Type | Chainsaws |
| Fits Models | 340 | 135 | 135E | 140E | 340E | 345 | 345E | 345E TRIOBRAKE | 350 | 435 | 435E | 435EII | 435II | 440E | 440EII | 440II | 445E | 445EII | 445E TRIOBRAKE | 445II | 450EII | 455E | 455E RANCHER II | 455E RANCHER II TRIOBRAKE | 455E TRIOBRAKE |
