A tattoo machine with a 4.0 millimeter stroke length utilizes a cam and armature bar setup to drive the needle assembly this specific distance. This measurement dictates the needle’s travel distance in and out of the skin. A machine configured with this stroke length is generally considered versatile, suitable for a range of tattooing styles from lining to color packing and shading.
The 4.0mm stroke provides a balanced approach, offering sufficient needle penetration for solid color saturation while maintaining enough control for precise line work. This versatility makes it a popular choice for artists seeking a single machine capable of handling multiple tasks. The development of machines with adjustable stroke lengths reflects the industrys ongoing refinement of tools to enhance artistic expression and efficiency.