A lever$-$shaped component is made by bending a blanked form, In the middle of a large productioe ran, it is noted that a namber of parts fracture, partially or fully, daring bending$-($a$)$ Sugeeit the mont hiely causc, azaurning that all blanka are sheared from the same batch of material, and suggrsit nemedies in the $($b$)$ btanking and $(c)$ bending operation.