Prosthetic Palm

Create a 3D-printable prosthetic palm, all dimensions in mm. Main body: 80 wide x 90 long x 20 thick, 4 mm rounded edges, flat top and bottom. On the front edge cut 4 rectangular finger-base slots, each 14 wide x 12 deep through the thickness, with 5 mm walls between slots and 4.5 mm at the outer sides. Through each slot, add a 2.2 mm diameter hinge-pin hole across the slot, 6 mm back from the front edge, perpendicular to the slot walls. On the palm (front) face, cut four 2 mm wide tendon grooves, 1.5 mm deep, running from each finger slot to the wrist end of the palm. On the left side add a thumb mount: a 20 x 20 x 20 block at 45 degrees, with a 2.2 mm pin hole through it. At the wrist end, add a cylindrical connector: outer diameter 60, inner diameter 50, length 25, with 4 evenly spaced 3.2 mm holes for M3 screws.

Parameters

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.