Analysis of the state of worn knife guards combine platforms John Deere company

In the article the analysis of the wear information of the cutting knife guards combine platforms DQ11499, H213405, H213508 company John Deere is presented. Statistically wear rates and theoretical distributions the wear information. Is established that the maximum wear of the cutting surfaces of knife guards ranges 1.31... 1.5 mm, and from 70 to 82% of measured surfaces require their restoration and subsequent hardening. Mean time between failures knife guards H213405 H213508 and is 29 hectares. Knife guards DQ 11,499 have an average time between failures of 16 hectares.