I need help wiring a Delta 28-280 model bandsaw from 220v to 110v. The saw came 110v from the factory, but the previous owner re-configured the wiring to 220v. I need it back to 110v. Thank you.

Rewiring the motor isn't hard, but be aware that you can hurt/kill yourself if you mess this up.

That said, manual is here.

Before you start, make sure you have a couple wire nuts (orange & yellow are a good sizes), a replacement plug, and some electrical tape.

1.) Unplug the cord from the wall. Go ahead and remove the prongs since you're going to need to switch it back to a 120V type prong adaptor. Don't put new prongs on until you've got things rewired. This will help keep you from accidentally electrocuting yourself.

2.) Open the saw base and have a look at the motor. There's a cover held on by a single screw. There should also be a wiring diagram on the motor that looks something like:

3.) When you remove the cover you should see three groups of wires. There should be numbers on the wires, but you can also figure them out by looking at the number of wires grouped together (see wiring diagram).

4.) You want to change from three groups of wires to two groups of wires per diagram, so when you're done, 1,3, & 5 should be grouped and 2,4, & 8 should be grouped. This is assuming your wiring diagram matches mine.

Make sure you don't have any exposed copper (cover w/ electrical tape if necessary). Make sure you have the wirenuts screwed on securely. Make sure you close the cover up and put the screw back in reasonably tight.

Put the prong on the wire, plug it in, and hit the start button. If you did everything right, it will start right up and no breakers will trip. If you goofed a pair, your motor may spin in the wrong direction. Otherwise, enjoy.