Sliding door pulley which is good?
The difference between the wheels just loaded up when the effect of good and almost the same (most people do not feel), but after six months there is a clear distinction. Poor roller resistance to wear is very poor, easy to make noise, pull up more rigid, easy to beat. Generally, the lower pulley is concealed, and neither of the two sides of the door can see the pulleyThe door outside the steel sleeve, there should be a sign of his own company.
Nylon and fiberglass pulley, good toughness, good wear resistance, smooth sliding and durable.
In the market, the material of the pulley outer cover is plastic pulley, metal pulley and nylon, fiberglass pulley 4 kinds.Plastic pulleys are tough but easy to break, and they become tough and tough when used for a long time, and the feel of pushing and pulling becomes very bad;The metal pulley is strong but easy to generate noise when it is in contact with the track;
