The choice between a ball-bearing rotary joint or one supported by a carbon guide is affected by several factors, let's find out which ones. Both options feature a self-supporting structure that is used when there is no external structure to mount a rotary joint, or when the joint configuration and application do not require external support. For many applications, rotary joints with external ring support, such as the PTX® rotary joint or the CorrPro® rotary joint, are the best solution.