Double Cupholder with Dovetail Bracket and Solid Rear-Rail Alt

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Bounding box: 141 × 101.5 × 97.5 mm
Engine: 3D Printing B-rep
Parameters: 35
Published: November 9, 2026

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The prompt

$fn = 64; cup_dia = 76; cup_depth = 90; wall_t = 3.5; rim_t = 5.0; bridge_w = 20.0; rail_w_top = 16.0; rail_w_bot = 22.0; rail_h = 8.0; difference() { hull() { translate([-cup_dia/4 - bridge_w/4, 0, 0]) cylinder(d=cup_dia + wall_t*2, h=cup_depth); translate([cup_dia/4 + bridge_w/4, 0, 0]) cylinder(d=cup_dia + wall_t*2, h=cup_depth); } translate([-cup_dia/4 - bridge_w/4, 0, wall_t]) cylinder(d=cup_dia, h=cup_depth + 1); translate([cup_dia/4 + bridge_w/4, 0, wall_t]) cylinder(d=cup_dia, h=cup_depth + 1); } translate([0, (cup_dia + wall_t*2)/2 - 2, cup_depth/2]) rotate([90, 0, 0]) linear_extrude(rail_h) polygon(points=[[-rail_w_bot/2, 0], [rail_w_bot/2, 0], [rail_w_top/2, rail_h], [-rail_w_top/2, rail_h]]);

Parameters

Name	Value	Range
Cup outer diameter at rim	70 mm	50 – 90
Cup height	75 mm	40 – 120
Center distance between cups	64 mm	50 – 110
Cup wall thickness	3 mm	1.6 – 6
Rim-to-base diameter taper	4 mm	0 – 12
Outer rim roundover	1.2 mm	0.4 – 3
Inner rim roundover	1 mm	0.4 – 2.5
Cup floor thickness	3 mm	1.6 – 8
Base block height	16 mm	10 – 30
Base lip beyond cup walls	2 mm	0 – 8
Rail width at top	26 mm	16 – 40
Rail width at bottom	22 mm	14 – 40
Rail height	6 mm	4 – 12
Rail length	40 mm	20 – 80
Sliding clearance per side	0.3 mm	0.1 – 0.6
Channel rear stop wall	6 mm	3 – 15
Bracket width	90 mm	50 – 160
Shelf thickness	8 mm	5 – 16
Shelf length	66 mm	40 – 120
Flange thickness	6 mm	4 – 12
Flange height	45 mm	20 – 120
Gap flange to cupholder	12 mm	4 – 40
Mounting screw hole diameter	4.5 mm	3 – 8
Screw hole X spacing	30 mm	10 – 70
Lower screw height	14 mm	8 – 40
Upper screw height	34 mm	8 – 80
Alt cup outer diameter	76 mm	50 – 100
Alt cup depth	90 mm	40 – 120
Alt wall thickness	3.5 mm	1.6 – 6
Alt top rim overhang	5 mm	2 – 10
Alt front bridge width	20 mm	10 – 40
Alt rail top width	16 mm	14 – 40
Alt rail bottom width	22 mm	14 – 40
Alt rail vertical height	8 mm	4 – 12
Alt rail protrusion length	8 mm	4 – 20

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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