Friction force between Toggle Pin and Toggle Bush is small, support area of Toggle Pin is not moved.
Lubrication is worse, ⇒Since the frication force of Bush becomes large. Also, in clamping and closing the mold, the
Toggle pin slightly moves to the rotation and axis direction.
AS a result, “Fretting” between Toggle Pin and Link Pin hole occurs and wearing is generated.
※ ”Fretting” means surface damage by repeated cyclical rubbing between two surface .