workbench Table height adjustment mechanism sprocket_gears_rack
grabcad
consist of a transmission for sprocket and chain roller with a ratio of 2.5 with pitch of 3/8, also gears pair with total ratio of 8, at the end of transsmision the mechanism have a rack what give the linear motion, the main cost of transmission is 380 dlls in a prototype (sprockets, chain and rack) total ratio: 20.57 crank velocity for 15 mm/s: 53.42 RPM Torque input (crank) for elevate 500 kg: 13.40 Nm (118.64 lbin) height adjustment: 650 to 1050 mm
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