Calculation of Bucket Forces Backhoe Attachment Calculation of Breakout Force and Digging Force on Backhoe Attachment Digging Force (RK) SAl/DIN The digging force is the available force at the tip of the bucket teeth created by the stick cylinder(s). Maximum digging force is calculated with dimension a at its maximum and with the bucket in a position calculated for max. breakout force. Rk = Fs x a

Fs Stick cylinder force a Perpendicular distance stick cylinder axis - stick pivot

b Distance stick pivot - tooth tip Breakout Force (L) SAE/DIN The breakout force is the available force at the tip of the teeth created by the bucket cylinder. Max. breakout force is reached when the available tooth force reaches aits maximum. L = c x e x Fl

Fl Bucket cylinder force c Perpendicular distance bucket cylinder axis - lever pivot d Perpendicular distance connecting link axis - lever pivot e Perpendicular distance connecting link axis - bucket pivot r Radius bucket pivot - tooth lip