RiserCup Furniture Lift

A cup that sits under a furniture leg and raises it. The rim is chamfered.

Raises a round or square leg, with an optional felt recess.

This model was designed in OpenSCAD with AI coding assistance.

License: CC BY 4.0. You can share it and adapt it. Credit the design, link the license, and say what you changed.

Recommended print: PLA, 0.4 mm nozzle, 0.20 mm layers, 3 walls, 15% infill, no supports. Keep each STL in the orientation it was saved.

Pictures are OpenSCAD renders.

Files and slicer estimates:

PrusaSlicer 2.7.2, generic PLA, the settings above. These lines are copied from the gcode summary.

• risercup-round-35-lift12.stl. Default round cup, 35 mm leg, 12 mm lift, 14 mm socket, felt groove on. estimated printing time (normal mode) = 1h 8m 20s. filament used [g] = 15.27.

• risercup-square-40-lift15.stl. Square 40 mm leg, 15 mm lift. estimated printing time (normal mode) = 2h 3m 51s. filament used [g] = 27.71.

• risercup-round-25-lift8.stl. Small round 25 mm leg, 8 mm lift, no felt groove. estimated printing time (normal mode) = 38m 55s. filament used [g] = 8.27.

• risercup-round-50-lift20.stl. Round 50 mm leg, 20 mm lift, thicker wall. estimated printing time (normal mode) = 2h 41m 35s. filament used [g] = 38.26.

The scad file is one file for the customizer. No other file is required.

What you can change:

• Leg shape: round or square, and the leg size.

• Extra room so the leg slips into the socket, and the wall thickness.

• Lift height, which is how far the leg rises, and how deep the leg sits.

• Chamfer on the rim.

• Felt groove under the foot, and how deep that groove is. The groove is 45 degrees so the foot still prints flat.

Stability: the lift height raises the leg and the centre of mass of whatever is on it. A tall cup under a narrow leg can slip or let the piece rock. Keep the lift modest next to the leg size, use the same height on every leg, and seat the leg fully in the socket. Do not use these under wheels, glass, or anything that rocks. Felt keeps the cup from skating. It does not make a tall lift stable.

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