International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

In order to test the tribological properties of the high alloy ledeburite steel X210Cr12, test samples were made on which the mass loss was measured before and after the wear test. The test was performed using the “pin on disk” method on the Taber abraser device, with part of the samples tested without lubricant and part with lubricant to compare and present the results. X210Cr12 steel was chosen as the material for the pin sample, while low alloy steel was chosen for the disk sample. In the lubricant test, hemp oil was used and analyzed to show the effects of this oil on the lubrication and wear of the material. During the test, each sample was subjected to a modified load and a modified number of cycles. From the test results, it can be concluded that hemp oil exhibited satisfactory properties over all test cycles, with an approximately constant pattern of mass loss. In addition, hemp oil showed more favorable properties at higher test loads and a greater number of test cycles, so it can be used as a lubricant based on the test results obtained under test conditions such as those that prevailed in this test.

In the design and development of new operating equipment, machinery and apparatuses for agriculture, the main criterion for their evaluation is their resistance in a working environment, or, their specific energy consumption, respectively. To define the resistance in progressive or rotary motion, the specific design features, the mode of impact and the environment parameters should be taken into, consideration. In progressive motion the resistance depends mainly on the speed. It begins to increase considerably at speeds over 5 km.h ^-1 when the second gear is of extreme importance. With apparatuses using rotary motion it is important to note that the resistance also depends on the square speed. At idle stroke particularly, the excessively high speeds increase significantly the power needed. With fans the main criterion for minimum specific energy consumption can be determined by the specific relations between the power needed, the rotation frequency, the discharge and pressure head.