Scale bearing insert

A platform weighing scale comprising:

• a base including four vertical corner stands at each corner of a rectangle;
• a weight supporting platform including four depending corner bearings at each corner of a rectangle;
• and
• weight sensing apparatus supported on said base comer stands, and supporting said weight supporting platform so that it is moveable relative to said base and a weight sensing mechanism responsive to movement of said platform for operating a weight indicating device, the weight sensing mechanism including
• a plate operatively associated with the weight indicating device,
• a pair of primary levers secured at one end to said plate and diverging therefrom relative to a longitudinal centerline and defining a select angle therebetween, and a pair of secondary levers each secured at one end to one of said primary levers and diverging therefrom relative to the longitudinal centerline and defining the select angle therebetween, each lever including an upper notch receiving one of said corner bearings and a lower notch receiving one of said corner stands so that movement of said platform causes pivotal movement of said levers to move said plate, and
• a bearing insert fit to each said lever between the upper notch and the corner bearing and between the lower notch and the corner stand, each bearing insert being formed to include a pair of troughs received in said notches for bearing on the corner bearing and corner stand, the troughs being angled relative to the primary levers corresponding to the select angle so that the primary levers fulcrum about an axis parallel to an axis about which the secondary levers fulcrum.