is chosen and described to explain the principles application and practical use of the invention to thereby enable others skilled in the art to utilize the invention the paint machine 90 has five major component instrument sleeve or tube 1 tube fixture 3 conveyor assembly 20 spin assembly 60 paint chamber 40 and the oven chamber 80 each tube fixture 3 includes two connected molded pieces fitting head 5 and fixture sprocket 10 fixture sprocket 10 is a single molded piece having a longitudinal shaft 15 with an annular toothed sprocket gear 11 and smooth annular ring 13 directly below the gear sprocket gear 11 and sprocket ring 13 are generally positioned below an intermediate point on shaft 15 in which that portion of shaft 15 extending above sprocket gear 11 is greater than that portion of shaft 15 which extends below ring 13 sprocket gear 11 generally has a larger outer diameter than ring 13 the reason for these dimensional distinctions will become obvious as they are subsequently explained in greater detail tube fitting head 5 is press fit onto the upper end of shaft 15 fitting head 5 has an outer shape and dimension for connectively accommodating one end of tube 1 tube 1 snugly and slidably fits over and rests upon the exterior of fitting head 5 fitting.