槽型上托辊的标准槽角为35度，因而每台输送机中使用最多的是35度槽型托辊和35度槽型前倾托辊。
The standard groove angle of the groove type upper supporting roller is 35 degrees, so the most commonly used rollers in each conveyor are 35 degrees groove type supporting roller and 35 degrees groove type forward inclined supporting roller.
调心托辊包括普通调心托辊、摩擦调心托辊以及锥形调心托辊。调心托辊用来自动纠正输送带在运转过程中出现的过量跑偏，用以保证输送机正常工作。
The self-aligning idler includes common self-aligning idler, friction self-aligning idler and tapered self-aligning idler. The self-aligning idler is used to automatically correct the excessive deviation of the conveyor belt in the operation process, so as to ensure the normal operation of the conveyor.