Home made dovetail cutter

[Eddyde]

In a pinch you can also use router bits on metal, just use a slower feed and lots of coolant. You can also regrind the rake if necessary.

 

[iron man]

Or for $13 you could just buy one and avoid the hassle.

https://www.grizzly.com/products/Dovetail-Cutter-3-8-x-60-/H2955

 

[Andre]

In a pinch you can also use router bits on metal, just use a slower feed and lots of coolant. You can also regrind the rake if necessary.

I did this a few times using a dovetail cutter. Worked great.