The JET 3520C-123 Spindle Encoder PCB Assembly is a replacement electronic control component used in compatible JET machine tool spindles, providing reliable spindle rotation feedback to the machine’s control system. It contains a printed circuit board and associated sensors that detect the spindle’s rotational speed and position by interpreting signals from the encoder mechanism moun... https://www.wholetoolbox.com/jet-3520c-123-spindle-encoder-pcb-assembly