Systems are available for rotary friction welding equipment which ensure that the parts are aligned after welding. An accuracy of approximately ±0.5° is claimed by some producers of alignment equipment but it should be appreciated that this level of accuracy may only relate to small diameter components.
There are two different types of alignment system: one which involves post-weld twist to achieve alignment, and another which uses encoding devices to monitor rotation and control the stopping-point.
Much depends on the accuracy required by the particular application. It may be necessary to consider using alternative friction welding techniques such as linear, orbital or angular/arcuate friction welding.
FAQ: What is linear friction welding?
FAQ: What is orbital friction welding?
For further information see Joining Technologies.