A cylinder piston rod coupler for misaligned shafts attaches one shaft to a housing and an annular flange on a stud attached to the other shaft is positioned in the housing between a pair of guide members. A retaining ring in the housing holds the guide members and stud in movable relation and a floating seal closes the housing about the stud and retaining ring. The guide members and the stud are impregnated with TEFLON so as to form slippery surfaces thereon.