This research design. Construction and analysis of a jack bolts metric diameter 14 mm phase pit. 2 mm. Which material is available for sale to the general public within the country. By applying the main component of the hydraulic design.13 mm phase pit. 3 mm which imported from overseas. And analyzed by the computer program SolidWorks to study the maximum bending moment of screw bolts, metric and send power to lift cars.And the safety of the bolts, metric of crane design. The results revealed that the The maximum bending moment is used in the transmission of rotation screw jack, 2 standard equals386 N.mm moment and maximum torque used in rotation bolts, metric of Jack design equals 2 407 N.mm,, The safety of the screw of hydraulic transmission standard equals 12.06 and the safety of metric bolts of hydraulic design equals 24.49
key words: design, build, analyze, crane,. Bolts, metric
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