The 4138 642 1201 Chain Sprocket is a genuine STIHL replacement drive sprocket designed for chainsaws and power equipment using 3/8" Picco (3/8"P) chains. With 6 precision-machined teeth, this sprocket ensures smooth and reliable power transfer from the engine to the cutting chain, supporting safe and efficient operation.
Key Features
✅ Part Number: 4138 642 1201
✅ Pitch: 3/8" Picco (3/8"P)
✅ Teeth: 6
✅ OEM Quality: Genuine STIHL drive sprocket
✅ Precision Fit: Matches STIHL clutch drums and chain systems
✅ Durable Steel Construction: Withstands high-speed rotation and cutting stress
Benefits
✔️ Restores Chain Performance – Replaces worn sprockets that cause slippage or chatter
✔️ Smooth Power Delivery – Ensures consistent cutting speed and torque
✔️ Prolongs Chain & Bar Life – Helps maintain proper chain alignment and tension
✔️ Quick & Easy Installation – Drop-in fit with no modifications needed
✔️ Engineered for Durability – STIHL-tough for professional and domestic use
What It’s Used For
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Replacing a worn or damaged 3/8" Picco 6T sprocket
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Maintaining proper chain function and drive performance
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Supporting routine chainsaw servicing and cutting system upgrades
