Abstract: A centrifuge, comprising in combination a motor driven shaft, a fluid centrifuging chamber carried by the shaft, to rotate therewith, first porting extending endwise in the shaft and opening to said chamber, to deliver fluid to be centrifuged to the chamber, a matrix in the chamber and into which contaminate in the fluid is centrifuged for compaction and separation from the fluid, during chamber high speed rotation, second porting extending endwise in the shaft and communicating with the chamber, to receive fluid from which contaminate has been separated, fluid delivering inlet structure communicating with said first porting, and fluid outlet structure communicating with the second porting. The shaft and centrifuging chamber are assembled via a flange on the shaft that closes the end of the centrifuging chamber.