Brackets and mounts
Rear Airflow Pressure Plenum with Shelf Ledges and Recessed Blower Mount
- Bounding box
- 304.8 × 398.8 × 711.2 mm
- Engine
- Precision B-rep
- Parameters
- 34
- Published
- August 9, 2026
Download
Free to download and use. See the terms.
The prompt
Generate a parametric 3D CAD model of an enclosed, flat-pack rear airflow pressure plenum with integrated shelf supports and a recessed low-profile blower mount. All components must be designed strictly for 0.25-inch thick sheet material. 1. Main Rear Duct: Generate a solid flat back wall that is 15.7 inches wide and 28.0 inches tall. 2. Side Walls: Generate two solid side walls extending forward by 12.0 inches from the extreme left and right edges of the back wall. 3. Shelf Ledges: On the interior faces of both 12.0-inch side walls, generate 7 horizontal shelf ledges. Each ledge must run the full 12.0-inch depth, protrude inward by 0.5 inches, have a vertical thickness of 0.25 inches, and be spaced at a 3.875-inch vertical pitch starting 2.0 inches from the bottom edge. 4. Front Pressure Face: Enclose the front of the rear duct by generating a flat front panel spaced exactly 1.25 inches away from the back wall. 5. Graduated Airflow Slots: Cut 7 horizontal airflow slots into this front panel. Center them horizontally and make them 14.0 inches wide. Position the bottom edge of each slot perfectly flush with the top surface of its corresponding shelf ledge. Set the vertical heights of the slots progressively from bottom to top: Tier 1 (bottom) is 0.13 inches, Tier 2 is 0.14 inches, Tier 3 is 0.16 inches, Tier 4 is 0.17 inches, Tier 5 is 0.18 inches, Tier 6 is 0.20 inches, and Tier 7 (top) is 0.21 inches. 6. Recessed Blower Pocket & Intake: At the bottom center of the front panel (below Tier 1), generate a 2.25-inch wide by 0.75-inch tall rectangular exhaust cutout flush with an internal mounting pocket designed to recess a thin 15mm-20mm centrifugal blower directly inside the plenum channel. 7. Assembly Joinery: Apply 0.25-inch mortise-and-tenon (tab-and-slot) interlocking joints along all mating panel edges for flat-pack assembly.
Parameters
| Name | Value | Range |
|---|---|---|
| Back Wall Width | 398.8 mm | 300 – 600 |
| Back Wall Height | 711.2 mm | 500 – 1000 |
| Back Wall Thickness | 6.35 mm | 3 – 10 |
| Side Wall Depth | 304.8 mm | 200 – 500 |
| Side Wall Height | 711.2 mm | 500 – 1000 |
| Side Wall Thickness | 6.35 mm | 3 – 10 |
| Front Panel Width | 386.1 mm | 300 – 500 |
| Front Panel Height | 711.2 mm | 500 – 1000 |
| Front Panel Thickness | 6.35 mm | 3 – 10 |
| Front Panel X Offset (back face from back wall) | 31.75 mm | 20 – 100 |
| Airflow Slot Width | 355.6 mm | 200 – 400 |
| Slot Height Tier 1 (bottom) | 3.3 mm | 1 – 10 |
| Slot Height Tier 2 | 3.56 mm | 1 – 10 |
| Slot Height Tier 3 | 4.06 mm | 1 – 10 |
| Slot Height Tier 4 | 4.32 mm | 1 – 10 |
| Slot Height Tier 5 | 4.57 mm | 1 – 10 |
| Slot Height Tier 6 | 5.08 mm | 1 – 10 |
| Slot Height Tier 7 (top) | 5.33 mm | 1 – 10 |
| Shelf Ledge Depth (front‑to‑back) | 304.8 mm | 200 – 500 |
| Shelf Ledge Projection (inward) | 12.7 mm | 5 – 30 |
| Shelf Ledge Thickness | 6.35 mm | 3 – 10 |
| Shelf Ledge Vertical Pitch | 98.43 mm | 50 – 200 |
| Shelf Ledge Bottom Offset (from floor) | 50.8 mm | 10 – 200 |
| Blower Exhaust Cutout Width | 57.15 mm | 20 – 150 |
| Blower Exhaust Cutout Height | 19.05 mm | 5 – 50 |
| Blower Cutout Center Z | 35 mm | 20 – 200 |
| Blower Pocket Inner Width | 75 mm | 40 – 120 |
| Blower Pocket Inner Height | 20 mm | 10 – 40 |
| Blower Pocket Inner Depth | 20 mm | 10 – 40 |
| Blower Pocket Wall Thickness | 6.35 mm | 3 – 10 |
| Tenon Length | 6.35 mm | 3 – 15 |
| Tenon Width | 20 mm | 10 – 50 |
| Number of Mortises per Edge | 4 | 1 – 10 |
| Mortise Margin from Top/Bottom | 25.4 mm | 10 – 100 |
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.
More models
Browse the full gallery →Trumpet Lyre Mount Main Body
A single 3D mechanical CAD part for a trumpet music lyre mount (Main Body with Paddle). Geometry details: 1. A 18mm-wide semi-cylindrical clamp arc for a 28mm diameter cylinder, w
UAV Ogive Nose Cone
Design a watertight, 3D-printable aerodynamic nose cone module for a fixed-wing tactical UAV, optimized for printing in Carbon Fiber Filled PETG (PETG-CF). The base of the nose con
Flat-Strap Reel Spool
Create a 3D model of a custom flat-strap reel spool for a home plate housing cavity. Geometry: - A reel spool consisting of two parallel circular outer flanges connected by a cent