Brackets and mounts
Headless Horseman Rear Support Frame
- Bounding box
- 279.4 × 291.6 × 239.2 mm
- Engine
- Precision B-rep
- Parameters
- 16
- Published
- September 11, 2026
Download
Free to download and use. See the terms.
The prompt
Create a 3D-printable mechanical support frame for a children's Halloween "headless horseman" costume. IMPORTANT: This is ONLY the rigid rear support structure. Do NOT include: - shoulder straps - waist straps - buckles - clothing - cape - human body - head - pumpkin The final object must be a clean, lightweight, printable 3D assembly. DIMENSIONS: BACK PLATE: - Width: 11.00 inches - Height: 8.00 inches - Thickness: 0.20 inches - Rounded corners - Centered and symmetrical TWO VERTICAL SUPPORTS: - Quantity: 2 - Height: 11.22 inches - Width: 1.18 inches - Thickness: 0.20 inches - Parallel to each other - Distance between the centers: 5.91 inches - The supports must connect firmly to the back plate. TOP RING: - Outside diameter: 7.09 inches - Inside diameter: 4.92 inches - Thickness: 0.80 inches - The ring connects to the two vertical supports. - The ring must remain completely open in the center. CONNECTIONS: - Add strong mechanical mounting points at the top and bottom of both vertical supports. - Use countersunk or recessed screw holes. - Design the connections so they can be assembled with screws and nuts. - Avoid sharp edges. - Add fillets/radius to structural corners. - Keep the structure lightweight but rigid. PRINTING REQUIREMENTS: - Designed for FDM 3D printing. - PLA or PETG compatible. - No supports where reasonably possible. - Split oversized parts into smaller pieces if necessary. - Add alignment pins or dovetail joints where a part must be split. - Each part must be exportable as an individual STL. - Make all parts symmetrical and dimensionally accurate. FINAL OUTPUT: Show the complete assembled rigid rear frame in 3D, with: 1. Back plate 2. Two vertical supports 3. Top ring 4. All mechanical connectors Do not include the wearable straps. The straps will be added separately later.
Parameters
| Name | Value | Range |
|---|---|---|
| Back Plate Width | 279.4 mm | 120 – 500 |
| Back Plate Height | 203.2 mm | 80 – 400 |
| Back Plate Thickness | 5.08 mm | 2 – 15 |
| Support Height | 284.99 mm | 120 – 500 |
| Support Width | 29.97 mm | 10 – 80 |
| Support Thickness | 5.08 mm | 2 – 15 |
| Support Centre Distance | 150.11 mm | 60 – 300 |
| Bottom Bracket Pad Height | 45 mm | 10 – 150 |
| Bottom Bracket Pad Thickness | 5.08 mm | 1 – 20 |
| Top Ring Outside Diameter | 180.09 mm | 80 – 400 |
| Top Ring Inside Diameter | 124.97 mm | 30 – 360 |
| Top Ring Thickness | 20.32 mm | 4 – 60 |
| Screw Hole Diameter | 4.5 mm | 1.5 – 12 |
| Bottom Hole Pair Centre (Y) | -80 mm | -250 – 0 |
| Bottom Hole Spacing | 25 mm | 8 – 120 |
| Top Ring Hole Spacing | 15 mm | 6 – 60 |
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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