Product Features  The steel chain wheel is reliably welded to the cylinder, enabling it to transmit higher torque and meet the requirements of medium and heavy-duty pallet conveying.  The key bearing assembly is composed of precision ball bearings and plastic inner/outer sleeves. This design is not only aesthetically pleasing but more importantly makes the roller operate more quietly.  The plastic end caps at the ends of the roller are designed to prevent dust and splashing water from damaging the bearings to a certain extent.  Applicable temperature: -5...