Add reverse to old drill

[knowlittle]

I have an old corded drill, one speed no reverse. It is a low rpm (500) drill that comes handy occasionally. I wish it had a reverse switch. Internet search seems to point at reversing brush wires. Is it really this simple? Thank you.

EDIT: The wires to the brushes are too short to tap. There are 2 long wires running from the trigger to the big coil. Can I reverse these wires instead?

 

[waross]

NO

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[knowlittle]

Thank you for confirming it's not going to work. What about this?

Field Coil 1 ---- Field coil 2 ---- Brush 1 ---- Rotor ---- Brush 2
Field coil 1 ---- Field coil 2 ---- Brush 2 ---- Rotor ---- Brush 1

Will these two give opposite rotation?

 

[waross]

YES

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[knowlittle]

Thank you.

 

[waross]

I hope that your brushes are at 90 degrees to the commutator. Some brushes are angled and don't work well in reverse.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[knowlittle]

The brushes are positioned 180 degrees apart between them. Contact with the shiny brass piece is 90 degrees. So I am good to go with the mod. Thank you.