Brackets and mounts
A4 Notebook Assembly with Hinge, Bands and Pen Holder
- Bounding box
- 164.5 × 216.0 × 26.0 mm
- Engine
- Precision B-rep
- Parameters
- 24
- Published
- October 28, 2026
Download
Free to download and use. See the terms.
The prompt
Create a simple, parametric, 3D-printable look-alike notebook assembly for folded DIN A4 paper (148.5 × 210 mm). Include two separate covers (154.5 × 216 × 5 mm), a removable 216 mm spine with three evenly spaced elastic-band slots, interleaving hinge knuckles with a straight 2.0 mm pin passage for removable 1.75 mm filament pins, and simple rubber-band retention. Add a separate Ø8 × 146 mm pen mock-up and two open cradles on the front cover’s outer face. Use separate named parts. Color both covers matte black, the spine and holder dark orange, and the pen dark purple. Keep geometry simple and printable in PLA. Treat hinge clearances and holder fit as unvalidated design assumptions. Build and preview the parts incrementally; do not claim success or export files unless they are actually created.
Parameters
| Name | Value | Range |
|---|---|---|
| Cover Width | 154.5 mm | 100 – 260 |
| Cover Height | 216 mm | 150 – 330 |
| Cover Thickness | 5 mm | 2 – 10 |
| Paper Width (folded A4) | 148.5 mm | 80 – 220 |
| Paper Height (folded A4) | 210 mm | 100 – 300 |
| Paper Block Thickness | 4 mm | 1 – 15 |
| Hinge Knuckle Radius | 2.5 mm | 1.5 – 5 |
| Knuckle Gap | 0.6 mm | 0.2 – 3 |
| Hinge Pin Passage Dia | 2 mm | 1.5 – 4 |
| Filament Pin Dia | 1.75 mm | 1 – 3.5 |
| Spine Thickness (X) | 5 mm | 2 – 10 |
| Spine Height (Z) | 12 mm | 8 – 25 |
| Band Slot Width | 3 mm | 1 – 8 |
| Band Slot Height | 2 mm | 1 – 6 |
| Rubber Band Width | 2 mm | 0.8 – 6 |
| Rubber Band Thickness | 1.5 mm | 0.5 – 4 |
| Pen Diameter | 8 mm | 4 – 16 |
| Pen Length | 146 mm | 60 – 200 |
| Pen Offset From Spine Edge | 25 mm | 10 – 60 |
| Cradle Length (Y) | 14 mm | 6 – 30 |
| Cradle Width (X) | 10 mm | 5 – 25 |
| Cradle Height (Z) | 10 mm | 6 – 25 |
| Cradle Open Bore Dia | 8.4 mm | 4 – 18 |
| Cradle Snap Opening | 5 mm | 2 – 16 |
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
PET Recycling Kiosk Frame
Design a production-ready welded steel frame for an outdoor PET bottle recycling and animal feeding kiosk. Create ONLY the steel frame. Do not create covers, motors, tanks, electr
Kugoo G2 Pro Rear Swingarm for KuKirin G4
Create a detailed 1:1 CAD drawing of custom rear swingarms for the Kugoo G2 Pro 2020 electric scooter. The swingarms must be designed to fit a KuKirin G4 hub motor instead of the o
Humanoid Robot Exploded Assembly
Design a 3D CAD model of a fully autonomous humanoid biped robot for the Robofest AI HOMO BOT competition. Dimensions Height: 800 mm (80 cm) Maximum weight: 20 kg Lightweight modu