coupling gear and disc for belting v belt

EFINITION : 
An explosion and flame proof motor EEx-d is a rotating machine which can work in an environment with the presence of gases and/ or explosive or
infiammable fumes without causing internal damage to the motor. It is in fact: Explosion-proof: its housing neither cracks nor explodes in case of an inward short circuit.Flame-proof: it doesn` t allow the exit of gases and flame from the motor when the ambient temperature is critica