A crimping cassette for a crimping device of a cable processing apparatus, the crimping cassette comprising a crimping tool having a stationary tool part and a movable tool part, wherein the stationary and movable tool parts are configured to act together in a crimping operation of the crimping device, wherein the crimping cassette further comprises a holding device having at least two claws (21a, 21b) for attaching to a mounting part in a mounting area of the claws (21a, 21b), the mounting part being directly or indirectly fixed to the stationary tool part, wherein the holding device has: a locked closed position in which the claws (21a, 21b) are firmly clamped to the mounting part; an unlocked closed position in which the claws (21a, 21b) loosely grip the mounting part for allowing an adjustment movement of the stationary tool part within a spatially limited adjustment range; an open position in which the claws (21a, 21b) release the mounting part such that the stationary tool part is separable from the holding device, wherein a closing spring is provided and arranged such as to close the gripping of the claws (21a, 21b) in the unlocked closed position, wherein the crimping tool further comprises a coupling device for releaseably coupling the movable tool part with the stationary tool part, characterized in that the crimping cassette further comprises an operating device adapted to operate the holding device at least between the locked closed position and the unlocked closed position, and in that the holding device further comprises a mandrel having: a back face shaped such that when it is pushed against a corresponding face of the claws (21a, 21b), the claws (21a, 21b) are tightened, in the mounting area, to the mounting part, a front face shaped such that when it is pushed against a corresponding face of the claws, the claws are spread, wherein the mandrel is moveable into an idle state in which none of the back face or the front face pushes against the claws (21a, 21b) to facilitate a tool part alignment operation in the unlocked closed position of the holding device, wherein the crimping cassette further comprises a holding device having at least two claws (21a, 21b) for attaching to a mounting part in a mounting area of the claws (21a, 21b), the mounting part being directly or indirectly fixed to the stationary tool part, wherein the holding device has: a locked closed position in which the claws (21a, 21b) are firmly clamped to the mounting part; an unlocked closed position in which the claws (21a, 21b) loosely grip the mounting part for allowing an adjustment movement of the stationary tool part within a spatially limited adjustment range; an open position in which the claws (21a, 21b) release the mounting part such that the stationary tool part is separable from the holding device, a locked closed position in which the claws (21a, 21b) are firmly clamped to the mounting part; an unlocked closed position in which the claws (21a, 21b) loosely grip the mounting part for allowing an adjustment movement of the stationary tool part within a spatially limited adjustment range; an open position in which the claws (21a, 21b) release the mounting part such that the stationary tool part is separable from the holding device, wherein a closing spring is provided and arranged such as to close the gripping of the claws (21a, 21b) in the unlocked closed position, wherein the crimping tool further comprises a coupling device for releaseably coupling the movable tool part with the stationary tool part, characterized in that the crimping cassette further comprises an operating device adapted to operate the holding device at least between the locked closed position and the unlocked closed position, and in that the holding device further comprises a mandrel having: a back face shaped such that when it is pushed against a corresponding face of the claws (21a, 21b), the claws (21a, 21b) are tightened, in the mounting area, to the mounting part, a front face shaped such that when it is pushed against a corresponding face of the claws, the claws are spread, wherein the mandrel is moveable into an idle state in which none of the back face or the front face pushes against the claws (21a, 21b) to facilitate a tool part alignment operation in the unlocked closed position of the holding device, a back face shaped such that when it is pushed against a corresponding face of the claws (21a, 21b), the claws (21a, 21b) are tightened, in the mounting area, to the mounting part, a front face shaped such that when it is pushed against a corresponding face of the claws, the claws are spread, wherein the mandrel is moveable into an idle state in which none of the back face or the front face pushes against the claws (21a, 21b) to facilitate a tool part alignment operation in the unlocked closed position of the holding device,