Ispitivanja mehaničkog oštećivanja zrna kukuruza provedena su na elevatoru, transportnom sredstvu okomitog transporta. Rad predstavlja usporedbu dinamičke otpornosti zrna kukuruza hibrida OSSK 552 na ulazu i izlazu iz elevatora tijekom transporta. Deklarirani kapacitet elevatora bio je 64 m3/h, volumen pojedine vjedrice iznosio je 2,1 dm3, a na traci je bilo pričvršćeno 360 vjedrica. Broj okreta reduktora, a samim time i pogonske glave elevatora bio je 80 min-1. Utvrđeno je da se tijekom navedenog transporta povećava udio loma, no ne u istom iznosu. Ispitivanja oštećivanja su obavljana na uzorcima različite vlažnosti, podijeljenih u 4 grupe i to: 28-30 %;23-25 %;17-19 % i 11-13 %. Kod vlažnosti materijala 29 %, izlazni lom bio je za 1,33 % veći od ulaznog. Ako se iskaže u relativnim odnosima onda je to razlika od 19,32 %. Kod vlažnosti kukuruznog zrna od 23 %, ta je razlika iznosila 1,03 %, relativno 22,94 %, dok je kod vlažnosti materijala 18 %, razlika bila 2,34 %, relativno 30,51 %. Na najsuhljem uzorku materijala od 12 %, ta je razlika iznosila 2,57 %, u relativnim iznosima čak 94,83%.Examining breakage of corn kernel on an elevator, the means for vertical transportation, the paper compares the mechanical resistance of the OSSK 552 maize hybrid when entering and leaving the elevator. The declared capacity of the elevator was 64 m3/h, the volume of each of the 360 buckets contained 2.1 dm3, the number of turns of the reductor and consequently of the upper drive pulley of the elevator amounted to 80 min-1. It was established that during the mentioned transportation the breakage had increased, but not in same amount. The damage was examined on samples of different moisture content distributed into four groups: 28-30 %;23-25 %;17 19 % and 11-13 %. In the 29 % moisture content of the material the end of breakage was 1,33% higher than the beginning one. If expressed relatively, this is a difference of 19,32 %. In the moisture of the corn kernel of 23 %, this difference amounted to 1,03 %, relatively 22,94 %, while in the moisture of the material of 18 %, the difference was 2,34 %, relatively 30,51 %. In the driest sample of the material, of 12 %, the difference amounted to 2,57 %, relatively even 24,83 %
