FIELD: machine building.
SUBSTANCE: saw chain is provided with tensioner. Chain runs around driven sprocket and guide plate. Said guide plate may be locked on case by clamping device. Said plate may displace to or from driven sprocket to loosen or tension the chains. Saw chain comprises pressure device to automatically displace guide plate from driven sprocket on loosening said clamping device. Pressure device consists of slide and elastic component. Guide plate rear end thrusts against slide rear end. Elastic component represent helical spring. Opposite ends of said spring thrust again case fixed element on one side and slide front end surface on opposite side.
EFFECT: simplified replacement and tensioning.
17 cl, 11 dwg
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