In what position do you install an idler?

Installing an idler on the slack side of a belt or chain system is the correct approach, as this positioning allows the idler to effectively take up the slack and help maintain tension in the drive system. The slack side is where the belt is not under tension; therefore, placing the idler here can help prevent issues such as slippage or misalignment of the belt, which could lead to increased wear or potential failure of the system components.

Idlers are designed to support the belt and facilitate smooth operation, and when positioned on the slack side, they can provide the necessary support without the added load that comes from the tension side. This helps ensure that the mechanical system operates efficiently and reduces the possibility of belt damage.