Pulley is a mechanical device that is used as a support for the movement of a belt or belt loop to carry out a flow force that functions to deliver a power. Pulley and Clutch Pulley products CV. Dwi Logam Jaya is a pulley that is durable because thick does not wear out quickly with fan belt friction. CV. bi-metal jaya produces various kinds of pulley with complete size and READY STOCK. We also provide pulley manufacturing according to customer needs.