a tensioner comprising a base , a shaft connected to the base , an eccentric adjuster coaxially engaged with the shaft , an arm pivotally engaged with the shaft , a pulley journalled to the arm , a torsion spring engaged between the arm and the base , the arm comprising a first receiving portion and a second receiving portion disposed axially opposite from the first receiving portion , a first damping member disposed between the arm and the base , the first damping member frictionally engaged with the base and engaged with first receiving portion , a second damping member disposed between the arm and the eccentric adjuster having a member engaged with the second receiving portion , and a biasing member disposed between the first damping member and the arm for applying a normal force to the first damping member and to the second damping member .