Bulk Grab Unloader 1:350 with Hand-Crank Clamshell Grab (free sample)

Free 1:350 sample of our generic rail-mounted bulk grab unloader (bridge type): a portal on two quay rails with a trolley that you push by hand along the girders and a clamshell grab that opens and closes when you turn a hand crank (crank-slider with two links, jaws 0 to 50 degrees), plus the receiving hopper and the belt to the quay. This download is the 1:350 STL set only: 160 x 109 mm on the quay base, 98 mm high, 28 STL files including girder sections with dowels, bogies, hopper, belt, machinery house, trolley, grab, pins and a fit test coupon (print it first). No supports, about 112 g. Slice-checked in PrusaSlicer (0.4 mm nozzle, 0.2 mm layers, PETG) and the linkage is swept in CAD with no collisions (running clearance 0.3 mm), but this exact version has not been test-printed yet. Honest compromises: the grab hangs on a rigid hanger, so there is no hoisting; at 1:350 the grab and pins are the same size as at 1:200 (printable minimum), so the grab is about 40 percent oversize. The full version has the 1:200 set as well and the multicolour 3MF, with all the render pictures, on Cults: https://cults3d.com/en/3d-model/game/rail-mounted-bulk-grab-unloader-model-hand-crank-clamshell-grab-hopper-belt