The cross-sectional details of the parts are shown in Figure 3 in which the machine shaft is supported by radial and thrust bearings. The radial bearings carry the dead load on the shaft, while the thrust bearings carry the axial load due to the compression of the sawdust by the auger. One end of the shaft is connected to the gear drive. At the other end of the shaft, a screw is inserted. The starting section of the screw placed inside the barrel carries the material into the mold. The mold consists of two sections, the first in which the cross section is gradually reduced to the final shape of the briquette (called forming mold or wear sleeve) and the last with a uniform cross section of the final briquette which exerts the back pressure necessary for compression due to friction. . Sawdust is chosen as a raw material because of its ability to produce briquettes with high calorific value[17] and its local availability. All of the sawdust used during this experiment is collected from a single source in a single batch. The sawdust is sieved to -5mm, dried to less than 8% moisture in a hot air stream dryer, and the dryer output at about 80°C to 90°C is sent directly to the drying machine. briquettes. Only briquettes of minimum acceptable quality were considered production. The mold must be maintained at a temperature of around 250°C so that the lignin contained in the biomass melts and acts as a binder. For screws and molds, spare parts were ready for replacement. For the first set of data, L&T's Eutechtrode 700 coated screw was used and it was left to run until it failed. The mold was also hardened by coating with Eutectrode 700. On average, it took approximately 45 minutes to remove the screw, cool the system, clean the system of raw material debris, install the new screw, and reinstall the system. of paper......Mathematical and computer modeling, volume 12, number 9, 1989, page 1176.[15] RC Vergin, Maintenance planning and crew size determination in the event of stochastic equipment failure, volume 13, number 2, October 1966.[16] M. Ozkok∗, The Effects of Machine Failures on the Shell 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 made from biomass of agricultural and forestry origin, Renewable energies, Volume 57, September 2013, pages 20-26. [18] Anbumalar V, Nagarajan MS and Balasubramani P, Improving Productivity in Screw Biomass Briquette Machine by Improving Mold Life, Article in Press, Journal of Manufacturing Engineering, December 2013, Vol. 8, number. 4, pp.. 244-248.