Heavy-Duty Gravity Phone Mount & Articulated Arm

Tired of flimsy phone mounts that sag, wobble, or require metal hardware? Meet the ultimate heavy-duty, 100% 3D-printable modular arm station. Combining a premium smart gravity-locking holder, an engineering-truss articulated arm, and a rock-solid reinforced C-clamp, this professional-grade system is built to secure heavy flagship smartphones (like Ultra and Pro Max series) with absolute stability.

🛡 Smart Gravity Locking Upper Unit

- Automatic Drop-and-Lock : Simply place your phone on the cradle. The phone's weight triggers the side clamps instantly via a synchronized 4-bar linkage system.

- Zero Tilt, Parallel Precision : Dual arc links on each side ensure the jaws stay perfectly vertical, eliminating any unwanted tilting or misalignment.

- Elastic Band Return : Uses a simple rubber band on the back to automatically snap open the clamps the moment you lift your device.

- Drop Safety Catch : An integrated vertical limit pin ensures the slider mechanism never over-extends or slips out under extreme movement.

🧩 Truss-Core Modular Articulated Arm

- High-Rigidity Truss Profile : Designed using structural engineering principles with integrated triangular cutouts. This maximizes bending and torsional resistance while keeping the weight minimal.

- Dead-Lock Hirth Joints : Connections feature an 18-tooth radial gear mesh with a 20° adjustment index and 0.5 mm tooth height. Once tightened with the heavy-duty M10 knobs, it guarantees zero-slip mechanical locking under heavy load.

- L-Pivot Horizon Compensation : The specialized L-shaped head isolates the tilt and rotation axes, allowing you to perfectly level your camera horizon or position the mount upside-down without dead zones.

💪 Power-Grip Stiffened C-Clamp Base

- Reinforced Structural Frame : The heavy С-shaped clamp features 4 external stiffening ribs to completely prevent plastic flexing under high static tension at maximum arm extension.

- 15mm Power Screw & Swivel Pad : Features a massive 15 mm primary screw with an ergonomic hand-turn knob and a rotating flat pressure foot that maximizes surface grip while protecting your desk from scratches.

- 360° Free Pan & Multi-Screw Versatility : The L-Base connector allows smooth 360° free horizontal rotation (yaw) without loosening, while the package includes three separate bolt lengths (20, 40, 60 mm) to perfectly fit any desk thickness.

📐 Technical Specifications

Parameter

Value / Metric

Mechanical Advantage

Clamping Range

70 mm – 118 mm

Fits 99% of modern smartphones with thick cases

Max Device Thickness

13 mm

Fully compatible with heavy armor/rugged cases

Modular Arm Lengths

100 mm / 150 mm / 200 mm

Mix and match lengths to customize your total reach

Arm Joint Indexing

18 teeth (20° steps)

Mathematical precision for predictable angle settings

Max Desk Thickness

Up to 40 mm

Fits securely on thin glass shelves or thick workbenches

Hardware Standard

Custom M10 & M15 Threads

Heavy-duty printed threads optimized for tool-less hand tightening

How to assemble the holder with arms

Phone Holder:

- Print List: 1 HolderBase, 1 HolderBottom, 1 HolderBottomStopper, 1 HolderSideLeft, 1 HolderSideRight, 2 HolderArcLeft, 2 HolderArcRight, and 10 HolderShims.

- You can use the provided .3mf file, where all of these objects are already arranged on the build plates.