The item started out as an autographic printer, but an enterprising fellow named Sam O'Reilly figured out the machine could be modified to deliver ink into skin, and the tattoo machine was born.
No one but a professional tattoo artist has any business operating a tattoo machine.
Function and design are important when choosing a tattoo machine.
A handmade tattoo machine is a product of just that - someone using their skills to successfully create a tattoo machine that will perform the way they would like their own equipment to run.
It doesn't take much to create a homemade tattoo machine.