Tattoo Machines , are made by tattoo artists for artists !
No welding, No casting !
Machine coils are hand wounding very very tightly, the coil wire is pure copper , not aluminum wire wrapped by copper on the market.
10 Wraps Coil, 22uf Capacitor , 28mm Height --- Used on Liner machine
12 Wraps Coil, 47uf Capacitor, 28mm Height --- Used on Shader machine
Machine starts at 2.5V , and working under 5.5-6.5V
Never got hot for long tattoo session.