When car engine moves car cooler's compressor,this pulley adjusts the tension of belt and thereby the durability of engine and compressor is improved and reduces the noise coming from the belt. When car engine moves car cooler's compressor,this pulley adjusts the tension of belt and thereby the durability of engine and compressor is improved and reduces the noise coming from the belt. It is Single Row Ball Type. Gear is located with the inner side of ring. It is Single Row Ball Type.
Gear is located with outer side of ring.
There are two types. One is high frequency Induction hardened gear and the other is quenching and tempered. It is Single Row Ball Type. There is no gear. There are two types.