Cable Jack – it's lifting mechanism for raising the cable reel on a small height, is used as a device who gives the winding and cabling. The basic principle of the cable jacks: a central hole threaded cable drum axle jack, axle set centering cone or sleeve, podzhimnye shoes moving along the axis of the drum to the cheeks and fixing clip. Racks Cable jack installed on both sides of the drum, providing a working gap between the cheek and a drum rack design (typically 100 mm.), a significant increase in this gap will increase the bending point on the axis, and thus the possibility of breakage. Next aligned with the axis of lodgements and will be involved lifting mechanism, whether it be a pair of helical, hydraulic or lever system. Lifting is carried to an altitude that provides compensation for uneven cheeks drum plus a guaranteed gap between the cheek and the surface, on which stand rack is usually about 50 – 100 mm cable jack main units: the rack, hoist, tool tray, axle. Cable jacks are classified: 1.Po operating principle: Screw the cable jacks – jacks is working on a pair of screw type (screw-nut) at the same time, usually in the process of lifting a cable drum nut rotational motion, and the screw forward. Screw the cable jacks in turn are divided into: push, cable jacks tyanuschie.Gidravlicheskie – it jacks, in which as the hoisting mechanism uses a hydraulic cylinder or hydraulic jack. The rise of the cable drum is accomplished by reciprocating the handle or hydraulic power station domkrata.Rychazhnye cable jacks – jacks is that the rise of the cable drum by means of a lever, the required force develops due to the difference shoulders arms and lodgement with respect to the support. 2.Po lodgement design: from mobile elements – a cable jacks, providing lightweight rotation axis installed on them, used when necessary to provide a low resistance when unwinding the cable, such as lack of lodgement include the inertia of the system, that is when the unwind reel having some speed, because of the large mass, has a decent inertia and as a consequence of long stops, after the removal of the applied efforts; c fixed point set axis. 3.Po design osikabelnye jacks with ball bearings, cable jacks without bearings. Accessory cable reels are Podzhimnye boots on the axle – to avoid move along the axis of the drum during the winding cable centering cone – for smooth and secure the cable unwinding, Wheel bearings – for maximum cable jacks provide the ability to unwind cable to the cable drums of different sizes.