What is the reason that the damping spindle is very tight?

You said the damping spindle is very tight is the first is because of its damping strength, may not match with what you said the product needs to damping strength, damping force is too large and led to the product rotation is not open smooth and very laborious. The second is not enough lubricant in the spindle, the spindle through friction to produce damping, adding the right lubricant to make the spindle rotate more smoothly, but also to ensure that the number of times the spindle is opened and closed, so I recommend that you customize the time to be a test sample and then in the ordering of bulk. I have ordered a spindle in the So Cheng spindle, are to carry out trial assembly in the order, you may wish to go to the specific ask.