Adaptive Three-Finger Door Knob Gripper

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Bounding box: 135.1 × 141.2 × 137.6 mm
Engine: 3D Printing B-rep
Parameters: 32
Published: November 8, 2026

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The prompt

design a gripper mechanism that is flexible and can grip onto a door knob of any shape

Parameters

Name	Value	Range
Base outer diameter	110 mm	60 – 160
Base housing length	70 mm	40 – 120
Actuator pocket diameter	62 mm	40 – 90
Pocket depth from front	60 mm	30 – 65
Finger mount radius	47 mm	30 – 55
Finger mount width	18 mm	10 – 30
Finger mount height	30 mm	10 – 40
Finger mount base height	65 mm	50 – 80
Actuator width	40 mm	20 – 60
Actuator height	40 mm	20 – 60
Actuator overall length	80 mm	40 – 120
Output shaft diameter	12 mm	6 – 20
Output shaft length	20 mm	8 – 40
Hub diameter	50 mm	30 – 80
Hub thickness	20 mm	10 – 40
Hub lug radial length	16 mm	8 – 30
Hub lug width	14 mm	8 – 30
Hub lug height	14 mm	8 – 30
Proximal link length	60 mm	30 – 100
Proximal link width	18 mm	10 – 30
Proximal link thickness	12 mm	6 – 20
Proximal link tilt angle	25 deg	0 – 60
Distal link length	50 mm	25 – 80
Distal link width	16 mm	8 – 30
Distal link thickness	10 mm	5 – 20
Distal link inward angle	145 deg	100 – 170
Grip pad length	30 mm	15 – 50
Grip pad width	25 mm	12 – 40
Grip pad thickness	8 mm	4 – 16
Pad rib width	2 mm	1 – 5
Pad rib height	1 mm	0.6 – 3
Pad rib pitch	6 mm	3 – 12

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.

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