TSINY Stroke 100mm 4" Inch Electric 24V DC Linear Actuator 600N Gear Motor

I needed a linear actuator to replace a failed one on an articulating bed. This one is underpowered for that application. The gearing is such that the unit will unwind under the weight of the bed when voltage is removed. It also stalls from insufficient torque about half way through the travel. It does run very smooth and appears well built. If you have a low force usage, I would recommend it.