TeraSpin is one of the few complete spindle manufacturers who make spindles and bearing units that enable ring frames to attain speeds upto 25000 rpm (mechanical). A new addition to TeraSpin's product range is spindles with bearing unit HF-21 C. These are much stronger and sturdier. They can handle ring frame tube lengths up to 290 mm running with a ring diameter of 54 mm and can go to a maximum spindle speed of 18000rpm (mechanical). Click on the link below to know more.