At what speed do you centrifuge blood?

Could you please elaborate on the process of centrifuging blood and the speed typically used for this procedure? I'm curious to understand the scientific rationale behind the specific speed chosen for this medical technique, as well as the potential impact it has on the blood components being separated. Additionally, are there any factors that can influence the optimal speed for centrifuging blood, and how are these factors taken into consideration when determining the appropriate speed?