Brackets and mounts
Mechanical Spring Arm
- Bounding box
- 340.0 × 100.0 × 420.0 mm
- Engine
- Precision B-rep
- Parameters
- 25
- Published
- November 2, 2026
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Free to download and use. See the terms.
The prompt
A mechanical spring arm is an articulated support mechanism that uses tension and pivot points to counterbalance and suspend heavy equipment (like monitors, cameras, or lights) in mid-air. It allows for smooth, weightless vertical and horizontal positioning.Core ComponentsBase Mount: Attaches firmly to a desk edge or wall, acting as the anchor.Lower & Upper Arms: Two rigid beams connected by a middle elbow hinge to create an extension range.Parallel Linkage: A four-bar linkage system that ensures the attached object stays perfectly level while moving up or down.Mechanical Spring: A coiled steel spring (either extension or torsion) housed inside or attached to the frame to pull or push against the weight of the object, counteracting gravity.Tension Adjustment Dial/Bolt: An accessible screw or knob that adjusts the tension of the spring to match the exact weight of your payload.End Mount (VESA / Spigot): The joint at the end of the arm that connects to the device.
Parameters
| Name | Value | Range |
|---|---|---|
| Base Width (X) | 80 mm | 50 – 150 |
| Base Depth (Y) | 60 mm | 40 – 100 |
| Base Height (Z) | 50 mm | 30 – 80 |
| Base Leg Thickness | 4 mm | 2 – 8 |
| Lower Arm Length | 300 mm | 200 – 500 |
| Lower Arm Width (X) | 30 mm | 20 – 50 |
| Lower Arm Depth (Y) | 20 mm | 10 – 40 |
| Lower Arm Wall Thickness | 2 mm | 1 – 4 |
| Upper Arm Length | 300 mm | 200 – 500 |
| Upper Arm Width (Y) | 20 mm | 10 – 40 |
| Upper Arm Height (Z) | 30 mm | 20 – 50 |
| Hinge Width (X) | 40 mm | 20 – 60 |
| Hinge Depth (Y) | 30 mm | 20 – 50 |
| Hinge Height (Z) | 40 mm | 20 – 60 |
| Spring Length | 150 mm | 80 – 250 |
| Spring Diameter | 25 mm | 10 – 40 |
| Wire Diameter | 3 mm | 1 – 5 |
| Number of Coils | 10 | 3 – 20 |
| Knob Diameter | 35 mm | 20 – 50 |
| Knob Thickness | 10 mm | 5 – 20 |
| Shaft Diameter | 8 mm | 4 – 15 |
| Shaft Length | 5 mm | 3 – 15 |
| VESA Plate Width (Y) | 100 mm | 75 – 150 |
| VESA Plate Height (Z) | 100 mm | 75 – 150 |
| VESA Plate Thickness (X) | 10 mm | 5 – 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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