Mini 3 Pro Arm Axis Replacement Guide

11 de agosto de 2026

Mini 3 Pro Arm Axis Replacement Guide

The Mini 3 Pro has four folding arms, each with a precision hinge axis that allows the arm to fold flat for transport. These hinges are vulnerable to crash damage and can crack, loosen, or seize after heavy use. A damaged arm axis causes arm wobble, motor vibration, and in severe cases, arm collapse during flight.

Symptoms of a Damaged Arm Axis

Arm feels loose or wobbly when locked open
Arm does not click firmly into the flight position
Visible cracks on the hinge body
Excessive motor vibration on one arm
Arm folds back during flight

Compatible Parts for Mini 3 Pro

Front Arm Axis Compatible with Mini 3 Pro — SKU AT00004
Rear Left Arm Axis Compatible with Mini 3 / 3 Pro — SKU AT00005
Rear Right Arm Axis Compatible with Mini 3 / 3 Pro — SKU AT00006

Tools You'll Need

Phillips screwdriver (PH000)
Plastic pry tool
Tweezers
Replacement arm axis for your specific arm position
Clean, well-lit workspace

Step-by-Step Replacement

Step 1 — Power off and remove the battery
Fully power off the drone and remove the battery before starting.

Step 2 — Identify the damaged arm
Test each arm individually. The front arms fold forward; the rear arms fold backward. Identify which hinge is faulty and note whether it is left or right.

Step 3 — Remove the arm shell
Each arm has a two-piece shell. Remove the screws along the arm length and separate the shell halves with a plastic pry tool.

Step 4 — Disconnect the motor cable
The motor cable runs through the arm. Disconnect it from the main board before removing the arm. Note the cable routing.

Step 5 — Remove the hinge screws
The arm axis hinge is secured to the drone body with 2–3 screws. Remove these and slide the arm out of the body socket.

Step 6 — Install the new arm axis
Slide the new arm axis into the body socket. Secure with the mounting screws. The arm should fold and unfold smoothly with a firm click at the open position.

Step 7 — Reconnect the motor cable
Route the motor cable through the arm and reconnect to the main board. Ensure no tension or pinching when the arm is folded.

Step 8 — Reassemble the arm shell
Reattach the shell halves and tighten all screws evenly.

Step 9 — Test before flying
Fold and unfold the arm several times. Power on and check for motor errors before flying.

Important Note on Front vs Rear Arms

The Mini 3 Pro has different hinge designs for front and rear arms. Front arms use a forward-folding hinge (AT00004), while rear arms use left/right-specific hinges (AT00005 and AT00006). Order the correct part for the arm position you are repairing.

Item adicionado ao carrinho

Mini 3 Pro Arm Axis Replacement Guide