Quick question about soldering a motor & grinding a flat rotor spot.

Originally Posted by What's_nitro?

Usually. It's more precise than a Dremel tool and there's no risk of accidentally going too far.

Here are the files I use. The flat file is about 1/4" wide, perfect for making the flat areas on motor shafts.

How long does it take to file a 5mm shaft? I have to grind a flat spot on a 1/2'' shaft in the future....