About this 3D model

In this type of gearbox, all the gears of the main shaft are in constant mesh with the corresponding gears of the countershaft. A sliding dog clutch is provided on the main shaft. Gear ratios 0.75, 1.33 and neutral. This model was designed in Tinkercad. 3-speed gearbox with reverse gear : Constant Mesh 3 Speed Gearbox with Reverse Gear by Bootjevaarder | Download free STL model | Printables.com Printing and Assembly The parts should be printed on a smooth build plate, not textured. If possible, avoid elephant foot. I printed the model on a PRUSA MINI, with PLA+ filament, layer height 0.15 mm. I use Hard Plastic Glue where necessary. For assembled and exploded views, use .stl files A0… X0… (do not print). Printing and assembly in alphabetical order (A1 → X1). Choise between Spur and Herringbone gears (A4 B2). Dimensions: 95 x 63 x 101 mm. Weight: 0.1 kg. Join gearbox to “4 Stroke Flathead Engine” Print parts X1 → X5. 4 Stroke Flathead Engine v1.0 by Bootjevaarder - MakerWorld To couple the gearbox to the engine, the “Cranked Handle” of the engine must be removed. The engine, coupling bracket and gearbox click into the “X1-Sled”. Important : Part “X2-Coupling Bracket” must be assembled in the correct orientation (ARROW). Operation Use the cranked handle to rotate the gearbox / engine. To couple / uncouple the gearbox from the engine, use “X5-Coupling Selector Fork”. For shifting gears, use “A3-Selector Fork”.