| Species | Features | Picture |
| Copper coated pulley | The encapsulation is easy to wear and the bearing clearance is large |
|
| Zinc alloy pulley | Corrosion resistance, poor impact strength |
|
| Carbon steel pulley | High hardness, high brittleness, easy to rust, short service life |
|
| Semi-closed stainless steel pulley | Easy to corrode, accumulate dust, dry and wear |
|
Fully enclosed bearin-g stainless steel pull-ey | Strong corrosion resistance, good bearing capacity |
|
