Brackets and mounts
Bicycle Crankset Assembly
- Bounding box
- 369 × 110 × 218 mm
- Engine
- 3D Printing B-rep
- Parameters
- 29
- Published
- October 28, 2026
Download
Free to download and use. See the terms.
The prompt
> **Technical CAD Blueprint and Engineering Drawing of a Bicycle Crankset Assembly (Platos y Bielas):** > * **Object:** Bicycle Crankset and Chainrings Assembly. > * **View:** Direct side-view orthographic projection technical blueprint / CAD drawing format. > * **Exact Dimensions and Annotations:** > 1. **Large Chainring (52T):** Outer diameter = `218.00 mm`. > 2. **Small Chainring (36T):** Outer diameter = `150.00 mm`. > 3. **Crank Arm Center-to-Center Length:** Exactly `172.50 mm` measured strictly from the center of the bottom bracket spindle axis to the center of the pedal axle hole. > 4. **BCD (Bolt Circle Diameter):** `110.00 mm` with a 5-bolt pattern. > > > * **Style & Presentation:** > * Professional 2D engineering drawing style with precise dimension lines, extension lines, callouts, arrows, and precise mm values visible. > * High-contrast technical blueprint aesthetic, clean line art, exact mechanical proportions, no artistic blur, no realistic photo style, strictly CAD layout format.
Parameters
| Name | Value | Range |
|---|---|---|
| Large chainring tooth count | 52 mm | 20 – 60 |
| Large chainring outer diameter | 218 mm | 100 – 300 |
| Small chainring tooth count | 36 mm | 20 – 60 |
| Small chainring outer diameter | 150 mm | 80 – 250 |
| Chainring plate thickness | 4 mm | 2 – 8 |
| Center hole diameter | 46 mm | 20 – 80 |
| Tooth depth | 5 mm | 2 – 10 |
| Axial distance between chainring centers | 4 mm | 2 – 10 |
| Small chainring axial center | 30 mm | 10 – 60 |
| Crank center-to-center length | 172.5 mm | 100 – 250 |
| Crank arm width | 20 mm | 10 – 30 |
| Crank arm thickness | 8 mm | 4 – 12 |
| Right crank arm axial center | 46 mm | 30 – 70 |
| Pedal boss diameter | 24 mm | 16 – 40 |
| Pedal axle hole diameter | 15 mm | 8 – 20 |
| Bolt circle diameter | 110 mm | 50 – 200 |
| Spider plate thickness | 2 mm | 1.5 – 6 |
| Spider bolt tab diameter | 14 mm | 8 – 24 |
| Crank hub diameter | 38 mm | 24 – 60 |
| Bolt head diameter | 8 mm | 4 – 14 |
| Bolt head/nut height | 2 mm | 1 – 5 |
| Bolt shaft diameter | 5 mm | 3 – 8 |
| Bolt shaft length | 10 mm | 6 – 20 |
| Nut diameter | 9 mm | 5 – 16 |
| Clearance per side | 0.25 mm | 0.1 – 0.5 |
| Spindle diameter | 24 mm | 12 – 40 |
| Spindle length | 100 mm | 60 – 160 |
| Square interface length | 8 mm | 4 – 20 |
| Spindle press overlap | 0.5 mm | 0 – 1 |
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