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How Do I Install Clevis Brackets on a PA Linear Actuator?

Clevis brackets allow the actuator to pivot slightly during operation, preventing lateral stress. Correct installation ensures smooth movement and maximises actuator lifespan.

Why Clevis Mounting Matters

Linear actuators produce force along a single axis. If the mounting geometry changes slightly as a mechanism moves — such as a hinged lid or tilting solar panel — the actuator rod can experience a side-load. Clevis brackets allow a controlled degree of angular articulation, keeping force axial and protecting the rod seal from damage.

Never use rigid mounting for moving applications Bolting both ends of an actuator rigidly to a moving mechanism will eventually bend the rod or crack the front housing. Always use at least one clevis joint in any application where geometry changes.

Installation Steps

1. Select the correct clevis size

PA clevis brackets are sized by actuator series. Check your actuator's product page for compatible mounting hardware. The rod-end clevis must match the actuator's rod-end thread specification (typically M6 or M8).
 

2. Thread the clevis onto the rod

Screw the rod-end clevis (female thread) clockwise onto the actuator rod. Do not over-torque — actuator rods are typically M6 threaded aluminium or steel; 4–5 Nm is sufficient.
 

3. Use a jam nut to lock position

Thread a jam nut onto the rod before the clevis, then tighten it against the clevis face once the desired extension depth is set. This prevents the clevis from unscrewing during vibration.
 

4. Attach rear clevis to fixed mount

The rear (body-end) clevis bolts to a fixed point on your structure. Ensure the pin passes through both clevis ears and is secured with a cotter pin or R-clip.
 

5. Verify free articulation

Manually move the mechanism through its full range. The actuator should pivot freely with no binding, twisting, or angular stress visible at either clevis. If binding occurs, adjust mounting positions.
 

Alignment Checklist

  • Both clevis pins are parallel (both pivot in the same plane)
  • Actuator is straight when the mechanism is at its midpoint position
  • Jam nut is tight against the rod-end clevis
  • All cotter pins or R-clips are installed
  • No lateral offset between front and rear mounting points