Sectional details of the parts are shown in figure 3 where the machine shaft is supported by radial bearings and thrust bearings. Radial bearings support the load itself on the shaft, while thrust bearings support the axial load due to compression of the sawdust by screw. One end of the shaft is connected to the gear drive. The screw is inserted into the other end of the shaft. The initial section of the screw located inside the cylinder conveys the material into the mold. The mold is made in two sections, the first in which the cross section is gradually reduced to the final shape of the briquette (called the forming mold or wear sleeve) and the second with a uniform cross section of the final briquette which exerts the necessary back pressure for compression due to friction. Sawdust is chosen as a raw material for its suitability for producing briquettes with high calorific value[17] and for its local availability. All sawdust used during this experiment is collected from a single source in a single batch. The sawdust is sieved to -5 mm, dried to less than 8% humidity in a hot air dryer and the result of the dryer at a temperature of approximately 80°C to 90°C is fed directly to the briquetting machine. Only briquettes of minimum acceptable quality were considered as output. The mold must be kept at a temperature of approximately 250°C for the lignin content in the biomass to dissolve and act as a binder. Both screws and molds were kept ready for replacement. For the first data set, L&T's Eutechtrode 700 coated screw was used and allowed to run until failure. The mold was also hardened by coating with Eutectrode 700. On average it took about 45 minutes to remove the screw, cool the system, clean the system of raw material debris, insert the new screw and reassemble...... middle of the article......Mathematical modeling and computer science, volume 12, number 9, 1989, page 1176.[15] RC Vergin, Maintenance Planning and Crew Size Determination for Stochastically Failed Equipment, Volume 13, Number 2, October 1966.[16] M. Ozkok∗, The effects of machine failure on the hull structure production process, Scientia Iranica E (2013) 20 (3), 900–908.[17] Mariusz J. Stolarski, Stefan Szczukowski, Józef Tworkowski, Michał Krzyżaniak, Paweł Gulczyński, Mirosław Mleczek, Comparison of quality and production cost of briquettes produced from biomass of agricultural and forestry origin, Renewable Energy, Volume 57, September 2013, pages 20- 26. [18] Anbumalar V, Nagarajan MS and Balasubramani P, Improving Productivity in Screw Biomass Briquetting Machine by Improving Die Life, Article in Press, Journal of Manufacturing Engineering, December 2013, Vol. 8, Edition. 4, pages 244-248.