A crimping tool for crimping an electrical contact toward engagement with an electrical conductor, including a housing, a pair of crimping dies, a die support arrangement supporting a first one of the crimping dies in a stationary position on said housing, and a displacing mechanism for displacing the other crimping die between open and closed positions relative to the stationary crimping die. The displacing mechanism includes a rotary drive shaft, a crimping arm having a first end portion connected with the movable crimping die member, and a rotary-to-reciprocatory motion converting mechanism adjacent the other end of the crimping arm for transforming the rotary motion of the drive shaft to a reciprocatory motion of the crimping arm, thereby to displace the movable crimping die between the open and closed positions.