and the surface 39 abuts the surfaces 27 and 37 and also spans those two surfaces as shown thus the drawings show the annularly shaped member or ring 38 which abuts the surfaces 27 and 37 and four screws 41 extend through openings 42 in the arm 10 and are threaded and thread into threaded openings 40 in the ring 38 for holding the ring 38 in the snug position shown the screw heads 50 are concealed in or countersunk in a recess 45 in the arm 10 with the arrangement described the screws 41 threadedly engage the ring 38 and pull the ring 38 downwardly as viewed in fig1 and thus the ring surface 39 is in tight abutment with the outer race surface 27 and thereby the outer race 23 is held in a set position relative to the arm 10 with this arrangement there need not be any close manufacturing tolerances compared to those of a snap ring arrangement and also the pivot ball assembly itself can be disassembled by taking the screws 41 out of their position and thereby removing the ring 38 from the arm 10 and then removing the race assembly designated 22 a cylindrically shaped spacing member 43 is disposed adjacent the pivot assembly 22 and is actually in abutment with the surface 29 of the inner race member 24 and the spacing member 43 is also in abutment with the arm 13 and is thus held in a set position another cylindrically shaped spacing member 44 is disposed at the opposite end of the inner race member 24 and is in a set position in the assembly and thus the inner race member 24 is held in a set position further the pin or bolt member 16 extends.