Products Description
High Branch Saw Sprocket – Wear Component for Pole Saw & Pruner Drive Systems
Direct Replacement Sprocket for High Branch Saws & Pole Pruner Attachments
The sprocket is a key component of the chain drive system on high branch saws and pole pruners, responsible for driving the saw chain around the guide bar . Located at the end of the engine crankshaft or gearbox output shaft , the sprocket engages with the chain to transfer power from the motor to the cutting action . As a high-wear part, the sprocket can fail if inadequately lubricated, impacted by hard objects, or if its teeth are worn down . A worn sprocket will cause the chain to move slower, slip, or fail to rotate, often accompanied by excessive noise and vibration . This replacement sprocket restores proper chain drive function and cutting performance for professional arborists and tree care workers.
Technical Profiles & Materials
6-Tooth / 3/8" Pitch Configuration – The C580000070 drive sprocket features 6 teeth/pins with a 3/8-inch pitch . The pitch is defined as the distance between 3 consecutive rivets divided by two . For Stihl GTA40 cordless pruners, the pitch type is 1/4" P .
High-Quality Metal Construction – Manufactured from durable metal to withstand the high torque and vibration of pole saw operation . The sprocket is designed to provide efficient power transmission and wear resistance in demanding pruning applications .
OEM Replacement Fitment – Available as genuine OEM parts from leading manufacturers. Echo C580000070 is a direct replacement for various pruners, pole saws, and trimmers . Homelite 610323001 is an OEM replacement for Ryobi and Homelite pole saws and chainsaws . Makita 199063-2 is designed for chainsaw and branch pruner maintenance .
Sprocket Nose Guide Bar Option – Some pole saw attachments feature a 10-inch reversible sprocket nose guide bar for efficient pruning, which uses a 3/8" Low Profile pitch chain . This design allows the bar to be flipped to extend service life.
Side-Mounted Chain Tensioning – Many modern pole saws feature side-mounted chain tensioning through the sprocket cover, allowing protected, easy, and quick chain tensioning and replacement . The tensioning screw is inserted laterally through the sprocket cover .
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Sprocket Type | Drive sprocket / Chain drive sprocket |
| 2 | Tooth Count | 6 teeth/pins (typical for Echo) |
| 3 | Pitch Options | 3/8" (Echo/Homelite) , 1/4" P (Stihl) |
| 4 | Diameter (Typical) | 1 inch (Homelite 610323001) |
| 5 | Material | High-quality metal |
| 6 | Compatible Equipment | Pole saws, pruners, chainsaws |
| 7 | Replacement Indicator | Chain slipping, wear/damage to teeth |
| 8 | Unit of Sale | 1 piece |
Products Application
Pole Saw Chain Drive Restoration
Direct replacement when the chain slips, moves slowly, or fails to rotate due to a worn or damaged sprocket . A failed sprocket will cause excessive noise and vibration, and replacement is essential to prevent additional damage to the equipment . Sprockets wear down easily and will need to be replaced frequently as a high-wear part . The sprocket is accessible by removing the cover, taking out the cutting chain and guide bar, using a sprocket wrench to remove the old sprocket, and positioning the new sprocket onto the crankshaft before securing with the retaining nut .
Pole Saw Gearbox Overhaul
When servicing the pole saw gearbox, the sprocket is a key component to inspect and replace if worn. The sprocket wheel is secured to the output shaft of the gear transmission and engages with the saw chain . Some pole saw designs incorporate a vibration damper between the gear and the sprocket wheel to improve weight distribution and reduce vibration . The sprocket cover with side-mounted chain tensioning allows for protected and quick chain tensioning and replacement .
Maintenance & Repair for Arborists
For professional arborists and tree care workers, keeping spare sprockets on hand is recommended as these are high-wear parts that will require frequent replacement for equipment to run as required .
Quality and Craftsmanship Details
Products Package
About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
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FAQ
Q: How do I confirm this sprocket fits my high branch saw or pole pruner?
A:Check your equipment model number and the existing sprocket part number if possible. The sprocket pitch (typically 3/8" or 1/4" P) must match your chain pitch. For Echo models, use C580000070 . For Homelite/Ryobi, use 610323001 . For Makita, use 199063-2 .
Q: What are the symptoms that indicate the sprocket needs replacing?
A: Common symptoms include the chain moving slower, slipping, or failing to rotate altogether . You may also notice excessive noise and vibration during operation . Visual inspection may reveal worn, rounded, or missing teeth on the sprocket.
Q: How do I replace the sprocket?
A: Ensure the chain brake is engaged for safety, remove the cover, and pull out the cutting chain and guide bar . Use a sprocket wrench to remove the old sprocket, position the new sprocket onto the crankshaft, and secure it with the retaining nut .
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