Umsebenzi wejoyinti lenjoloba ukumane uvale okuphakathi, futhi inhloso ukuvimbela okuphakathi ngaphakathi kwejoyinti yenjoloba ukuthi ingavuzi. Indawo ephakathi nendawo iwuketshezi ohlelweni lokudlulisela lwejoyinti lerabha, ngakho umsebenzi wejoyinti lerabha epayipini ukumunca ukushaqeka nokunciphisa umsindo. Ama-burrs wejoyinti yenjoloba makhulu kakhulu, futhi isikhunta sivame ukusetshenziswa ngesikhathi sokukhiqiza. Ngemuva kokubunjwa, idinga ukuthululwa ngaphandle kwesikhunta. Ezimweni eziningi, ijoyinti yerabha eyindilinga eyodwa izoba nama-burrs ngemva kokukhululwa kwesikhunta, futhi okuphumayo neziphetho zokufaka zejoyinti lerabha zinemishini yokuvala.