A hydraulic unit with parallel pumps linked to a servomotor comprising: a first hydraulic pump comprising a hydraulic sleeve, an upper hydraulic chamber, a lower hydraulic chamber, a plunger, two hydraulic rods (4D, 4D'), and a hydraulic pressure accumulator; a second hydraulic pump comprising a hydraulic sleeve, an upper hydraulic chamber, a lower hydraulic chamber, a plunger, two hydraulic rods (4E, 4E'), and a hydraulic pressure accumulator; a servomotor, coupled to the upper face of a roller bearing that has a ball screw coupled on the lower face of the roller bearing and interlinking the servomotor to the hydraulic pumps (1, 2); a pressure sensor configured to record a pressure change in the hydraulic unit; a reservoir configured to store oil for filling the upper hydraulic chambers (10D, 10E); two upper check valves (VI, V2) involved in supplying oil from the reservoir to the upper hydraulic chambers (10E and 10D); two lower check valves (V3, V4) involved in supplying oil from the lower hydraulic chambers (11E and 11D) to the hydraulic pressure accumulators (14E and 14D); two suction filters (23, 24) drawing oil from the oil reservoir and forcing the opening of the upper check valves (VI and V2); wherein the two hydraulic pumps mounted in parallel work jointly with the servomotor; wherein the ball screw has the function of displacing a bolt of the ball screw upwardly or downwardly, according to the rotation direction of the servomotor; wherein the hydraulic rods (3E, 3E', 4D, 4D') are static, fixed on the lower face of the roller bearing and on a base; and wherein the hydraulic sleeves (5D, 5E) of the hydraulic pumps (1, 2) move to perform the pumping. a first hydraulic pump comprising a hydraulic sleeve, an upper hydraulic chamber, a lower hydraulic chamber, a plunger, two hydraulic rods (4D, 4D'), and a hydraulic pressure accumulator; a second hydraulic pump comprising a hydraulic sleeve, an upper hydraulic chamber, a lower hydraulic chamber, a plunger, two hydraulic rods (4E, 4E'), and a hydraulic pressure accumulator; a servomotor, coupled to the upper face of a roller bearing that has a ball screw coupled on the lower face of the roller bearing and interlinking the servomotor to the hydraulic pumps (1, 2); a pressure sensor configured to record a pressure change in the hydraulic unit; a reservoir configured to store oil for filling the upper hydraulic chambers (10D, 10E); two upper check valves (VI, V2) involved in supplying oil from the reservoir to the upper hydraulic chambers (10E and 10D); two lower check valves (V3, V4) involved in supplying oil from the lower hydraulic chambers (11E and 11D) to the hydraulic pressure accumulators (14E and 14D); two suction filters (23, 24) drawing oil from the oil reservoir and forcing the opening of the upper check valves (VI and V2); wherein the two hydraulic pumps mounted in parallel work jointly with the servomotor; wherein the ball screw has the function of displacing a bolt of the ball screw upwardly or downwardly, according to the rotation direction of the servomotor; wherein the hydraulic rods (3E, 3E', 4D, 4D') are static, fixed on the lower face of the roller bearing and on a base; and wherein the hydraulic sleeves (5D, 5E) of the hydraulic pumps (1, 2) move to perform the pumping.