Profile: Joyce Dayton Corp. offers standard and custom manufactured bellows and covers. Our product line includes screw jacks, actuators and speed reduction equipment. Our round bellows are used in protection of screws, cylinder rods, or guides. Our square/rectangular bellows are used in expansion connections between ducts, protection of translating mechanical devices and protection of square or rectangular machined parts. We also provide lead screws, ball screws, splines, shafts and U-joints.