Bolt Stretcher Series

A hydraulic bolt tensioning tool provides a quick and easy method for tightening large diameter bolts to high and accurate pre-loads.
Unlike conventional methods it does not use torque and does not require any forceful turning of the nut or bolt, like impact wrenches, flogging spanners or hydraulic torque wrenches.

The working principle of bolt stretcher is mainly based on hydraulic transmission, using the Pascal principle to transfer energy. twelve
The bolt stretcher applies direct external force to the bolt through a hydraulic cylinder, causing it to be stretched within the elastic deformation zone. This stretching causes slight deformation of the bolt diameter, making it easier for the nut to loosen. During the operation, the design of the hydraulic tensioner allows multiple bolts to be tightened and disassembled at fixed values simultaneously, ensuring even force distribution. This method is not affected by bolt lubrication and thread friction, thus providing more accurate bolt load control.
In addition, the design of hydraulic stretchers also takes into account the requirements of usage space and bolt exposed length to ensure correct use. When using, it is necessary to calculate the set tensile force based on the pre tightening force requirements of the bolt and ensure that it does not exceed the allowable stress of the bolt. For multiple bolts on the flange surface, it may be necessary to stretch them in stages and in order to avoid uneven tensile force between bolts

Model: YAX-TA