STIHL chain sprockets are made from wear-resistant steel and are designed to transmit the power from the engine to the saw chain with as little loss as possible. The teeth of the chain sprocket press against the drive link tanks and the saw chain starts to rotate.
Every single STIHL chain sprocket undergoes maraging in a hardening furnace. This production process increases the wear resistance and life of this part.
STIHL spur chain sprockets are permanently attached to the clutch drum by a special soldering process. They are standard on compact saws and Farmer class saws.
STIHL sintered steel rim sprockets ensure very smooth chain running. They are arranged on the clutch drum hub and can move axially. If wear occurs, only the rim needs to be replaced.
All spur chain sprockets are thoroughly tested again with computer-assisted test methods before being brazed onto the clutch drum. That ensures consistently high quality.