There are two main families of HYTORC torque wrenches for your torque applications from 70 Nm to 187 000 Nm:
In addition to tightening, these various tightening tools will obviously allow you to loosen and even release nuts. Thanks to the numerous HYTORC models, you have the choice of the level of technology to carry out your clamping, at the most adapted price. The hydraulic torque wrenches are available for rent from HYTORC France.
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A hydraulic wrench is a powerful, adjustable and precise tool that allows you to screw with torque. The torque is the product of a force multiplied by a lever arm. A hydraulic wrench consists of a double-acting 700 bar hydraulic cylinder that drives a gear wheel. The power of a hydraulic cylinder is so great that even with a very small ratchet wheel, the torque produced is very significant. A hydraulic wrench that fits in the palm of your hand develops as much torque as a manual torque wrench that is 5 feet long or more. The force delivered by the cylinder is well controlled, so by adjusting the pressure on the pump (which supplies the torque wrench via a set of twin hoses) we obtain a torque (rotary force) with dynamometric precision.
The hydraulic wrench is operated by a 700 bar double-acting cylinder to achieve fast cycles with low pressure return and adjustable pressure thrust. Each wrench comes with a torque/pressure chart that allows you to adjust the torque delivered by setting the pressure on the pump. Accuracy is guaranteed by the issuance of a calibration certificate attesting to the torque/pressure correspondence.
The tightening force applied in the assembly depends mainly on the friction at the time of screwing and it is therefore necessary to know the torque/tightening correspondence or the friction coefficient of the bolts to determine the torque to be applied.
HYTORC France designs, develops and manufactures hydraulic wrenches since 1968. HYTORC is the forerunner of all the major innovations in the sector including :
The driving force of the hydraulic torque wrenches is provided by a 700 bar double-acting cylinder integrated into the chassis. The thrust pressure is set on (or controlled by) the hydraulic pump so that it has an adjustable and controlled effort. For speed, the return is done at low pressure to exploit the best possible flow from the hydraulic pump. A hydraulic torque wrench HYTORC is thus supplied by a twin hose where one hose corresponds to the High Pressure circuit (Thrust) and the other to the Low Pressure circuit (Return).
The frame of the hydraulic wrench fulfills several functions: it integrates the hydraulic cylinder and the mechanical drive. The reaction arm is also attached to it and is therefore subject to great stress. For more resistance, HYTORC manufactures its frames in a single block of aluminum alloy that offers the strength necessary for a safe work.
Torquing introduces torsion into the bolt, which seeks to release itself as soon as the tool releases its force (piston return). The HYTORC Anti-Return Mechanism retains this relaxation throughout a tightening operation while this torsion increases as the wrench cycles and the applied torque increases. Each cycle of the hydraulic cylinder is therefore 100% efficient, as it does not have to take up the relaxation usually released at the end of the previous cycle. This mechanism not only ensures greater productivity, but also greater safety, as the reaction arm or heel remains in place during tightening, limiting the risk of crushing injuries to operators.
Torsion in the bolt is linked to friction in the threads, and its amplitude is proportional to the bolt’s useful length. The Anti-Return system is therefore even indispensable for certain loosening operations.
This system consists of a cage guiding a toothed wheel and a 5-tooth piece taking the force of the piston to drive the rotation. This last part is maintained in contact with the wheel by springs that allow it to jump the teeth when the piston returns. The hydraulic torque wrench HYTORC never locks on the bolt because it has a natural tendency to move away from its fulcrum when the piston returns. This mechanism is simple and has been proven for over 30 years.
The transmission of torque between the key and the socket is ensured by the square drive. HYTORC has replaced the sliding square by a splined shaft with a square end because for some applications, the space is limited and the size of the wrench + socket (Female or Male) is too important. It is therefore possible to replace the Square Spline Conductor with a part with a Male Hexagonal end or even a Female Hexagonal end (direct socket) instead of the square end. The Grooved Conductor Square (or direct socket) is held by a push button cap at the other end allowing it to be released to be turned over and reversed in the Tightening / Loosening direction.
To avoid the risk of pinching operators, Clamp NUTs and Z Washers can be used as reaction points. The reaction arm is then replaced by a bell or a driver that rests directly on these accessories and without an arm that moves around the wrench that can hit and/or pinch the operator. In addition to the safety aspect, the quality of the tightening is also improved, as there is no more shearing stress applied to the bolt during tightening, as all the forces are distributed evenly around the axis.
For the hydraulic eye wrenches, the Cassette which is positioned directly on the nut or the head of the screw to be tightened is manufactured with the minimum thickness necessary for the transmission of the tightening torque in order to favor compactness and to be able to pass everywhere where space is restricted. The links of each model are the same thickness and their radius is related to the size of the female hexagon, always with the aim of having the most compact clamping tool possible to access limited spaces. Hydraulic wrench links provide a bearing surface at the heel under the cylinder section that allows for in-line reaction at the same level as the torque application area.
Delivery upon validation of the order