Put on a pair of clean latex or nitrile gloves. Insert the sterile tube into the tattoo machine. The tip of the tube should be facing the front of the machine.
Place a disposable grommet onto the armature bar post on the back of the tattoo machine.
Slide the sterile needle into the tube. The grouping of the needle should be flush with the tip of the tube opening.
Secure the eye loop, located on the back of the needle, onto the grommet. Use light pressure to push the eye loop of the needle onto the grommet.
Press the foot pedal to send power to the machine and ensure that the needle is moving in and out of the tube tip, remaining flush with the tube tip on return.