AC Variable Speed Controller, Akozon AC 110V 400W Knob Motor Speed Controller DC 24V~90V Output Single Phase Asynchronous Motor Speed Controller

The Akozon AC Variable Speed Controller is a popular and inexpensive option for controlling motor speeds. While some reviewers found it challenging to hook up due to tiny screws, others found it very easy to wire up. The controller was used successfully to fix a free lathe and replace a speed control on a Delta wood lathe. One reviewer even used it to run a 30-pound rock tumbler for weeks without any issues. However, one reviewer noted that the unprofessional manufacturer did not supply any instructions for use, including a kill switch for safety. Overall, this product seems to work well but requires some technical skills to set up properly.