调心托辊用来自动纠正输送带在运转中出现的过量跑偏，以保证输磅机正常工作。安装精度较高，特别是已设置了前倾托辊的输送机，可不设置调心托辊。需要设置调心托辊的输送机一般每10组托辊中设一组调心托辊。
The self-aligning idler is used to automatically correct the excessive deviation of the conveyor belt in operation, so as to ensure the normal operation of the conveyor. The installation accuracy is high, especially for the conveyor with front tilt idler, the center adjusting idler is not required. The conveyor that needs to be set with centering idler generally has one set of centering idler in every 10 sets of idler.
调心托辊的型式有很多，DTII(A)型带式输磅假山制作 不锈钢铸件 铝箔真空袋 七孔梅花管 hdpe硅芯管 液压钢坝 PVC软管 飞行激光打标机 沥青保温机配设了摩擦调心托辊和锥形调心托辊两种式样的调心托辊供选用，后者带可用于可逆式带式输送机。
The DTII (a) belt conveyor is equipped with two types of centering rollers, friction centering roller and cone centering roller. The latter belt can be used for reversible belt conveyor