On the contrary to hydraulic torque wrenches the hydraulic bolt tensioners enable initial tensioning of bolts/studs without application any torque since the tensioning force is applied in line with the central line of the bolt/stud usually towards the expanding direction. Therefore the pre-tensioning force of bolts is independent on the friction coefficient. The bolt tensioners are actuated by means of a hand pump or electric pump or pneumatic pump with the output pressure of 800 or 1600 bars depending on the unit version. Optional and customized designs of the bolts tensioners with various values of pre-tensioning force, size and application procedures are available upon individual orders.
An electric torque wrench is a combination of a planetary transmission with an intermediate transmission and a drive provided with a pneumatic motor. The torque wrench collaborates with the pressure control unit that is made up of a water trap, an oil lubricator for compressed air and a manometer.
Adjustment, i.e. setting of the desired torque is carried out by adjustment of the corresponding air pressure that is indicated on the attached monometer.
Hex socket and insert bits torque wrench is designed to tighten and loosen bolts with used of standardized hex sockets and dedicated adapters (insert bits). Key components of wrenches are made of a lightweight alloy based on aluminium and titanium compounds whilst the ratchet and driving units are manufactured with use of “ultra steel” that makes them as sturdy and durable as titanium pieces.
The wrenches collaborate with hydraulic power packs (800 bar) that can be powered by an electric motor or a compressed air drive. The power pack is remotely controlled by means of a dedicated remote control unit. Operation in the fully automatic mode is as option. Bolts are tightened with the controlled torque up to the required limit, which is achieved by setting a specific oil pressure on a connected manometer, where the pressure corresponds to the desired torque. The torque values and associated oil pressures can be found on the table of torques that is attached to each wrench. Hydraulic wrench – principle of collaboration with applicable hex sockets and Allen pins. For the full range of sockets and pins please refer to the relevant directory.
An electric torque wrench is a combination of a planetary transmission with an intermediate transmission and an electric drive. The drive incorporates an electric motor and an electronic control circuit. Adjustment of the tool with setting the desired torque is enabled by the torque controller. An electric tightening machine can be also referred to as an automatic torque device with adjustable torque suitable for tightening and loosening of bolts.