Interchangeable reaction washer initially penetrates with outward bottom serration edges only during manual pre tightening. Slippage is thereby avoided at begin of the consecutive power torque wrench assisted full tightening of the nut and/or bolt head resting on it. As the load ramps up, the reaction washer flattens out and the bottom serrations gradually penetrate radially inwards. Reaction and actuation sockets of varying sizes matching a broad range of reaction washers and nut and/or bolt heads may be interchangeably snapped on a reaction coupling connected to the torque wrench housing. A clearance undercut underneath the reaction washer torque receiving flanges absorbs eventual debris to further assist unimpeded and fast coupling of the system. Radially oriented contact faces between reaction washer and reaction socket provide a snug contact unaffected by their toroidal movement during washer flattening and a force transfer free of radial force components.

An electric pulse tool for performing tightening operations, where torque is delivered in pulses to tighten a screw joint, includes an output shaft, a sensor arranged to determine a parameter value associated with the tightening of the screw joint, a processor, and a memory containing instructions executable by the processor. The electrical pulse tool operates to provide torque pulses on the output shaft in a first direction until the determined parameter value associated with the tightening of the screw joint reaches within or above a predetermined first interval including a target parameter value. The electrical pulse tool also operates to provide at least one torque pulse on the output shaft in a second direction that is opposite to the first direction in case the determined parameter value exceeds the target parameter value within a predetermined second interval.

Method and device for tightening a threaded connection, preferably for connecting pipeline components, wherein the threaded connection to be tightened comprises a connecting element unit having an external thread, a connecting element unit having an internal thread, and a seal element arranged therebetween.

A torque socket tool is provided, including: a main body, a driving member, an engaging member, a torque adjustment assembly and a rotating member. The main body defines an axial direction and has a first restricting portion. The driving member is rotatably disposed on the main body about the axial direction. The engaging member is slidably disposed on the main body. The torque adjustment assembly includes a mandrel. The mandrel is disposed within the main body and rotatable about the axial direction. The rotating member is non-rotatably sleeved with the mandrel and has a second restricting portion.

A fastening socket includes a socket main body having a first insertion hole formed thereon, the first insertion hole configured to match with a plug; a securement base installed inside the socket main body and having a second insertion hole formed thereon; the second insertion hole configured to match with the first insertion hole; an insertion bracket secured inside the securement base and configured to match with the second insertion hole; a fastening seat rotatably installed on the securement base and having a side surface formed with a fastening surface; the fastening surface configured to press the insertion bracket onto the plug firmly; and a rotational handle secured onto the fastening seat and configured to locate at a surface of the socket main body. Accordingly, the fastening socket of the present invention is of simple structure that is facilitated for use with reliable fastening and prolonged useful lifetime.

A unitary base for a torque limiting device is disclosed. The base accepting a plurality of swappable torque limiting fixtures (STLF), whereby a single unitary disposable plastic base may be utilized to form a variety of different specific torque limiting devices and a method to construct and configure such a device.

In a tightening method for a screw connection of a bolt and a nut by using a tensioning device, a rotary drive, and a process control unit with documentation module, the nut is tightened with the rotary drive by a tightening moment required for the nut to bear against a support. The screw connection is elongated by exerting axial tension on a threaded end of the bolt protruding from the nut. The nut is further tightened while maintaining elongation, and a rotation angle covered during further tightening is detected by a rotation angle sensor. Lengthening of the bolt is calculated from the rotation angle and thread geometry of the screw connection. A longitudinal force in the threaded bolt is calculated from lengthening of the bolt, bolt diameter and bolt length. The calculated longitudinal force and an identifier identifying the screw connection are stored in the documentation module.

Interchangeable reaction washer initially penetrates with outward bottom serration edges only during manual pre tightening. Slippage is thereby avoided at begin of the consecutive power torque wrench assisted full tightening of the nut and/or bolt head resting on it. As the load ramps up, the reaction washer flattens out and the bottom serrations gradually penetrate radially inwards. Reaction and actuation sockets of varying sizes matching a broad range of reaction washers and nut and/or bolt heads may be interchangeably snapped on a reaction coupling connected to the torque wrench housing. A clearance undercut underneath the reaction washer torque receiving flanges absorbs eventual debris to further assist unimpeded and fast coupling of the system. Radially oriented contact faces between reaction washer and reaction socket provide a snug contact unaffected by their toroidal movement during washer flattening and a force transfer free of radial force components.

A method of verifying a magnitude of a delivered output torque during a tightening operation of a threaded joint performed by a hand held power wrench including a housing, a motor, an output shaft, and a power transmission connecting the motor to the output shaft. The method includes: tightening the threaded joint; monitoring a magnitude of a direct torque acting along the power transmission during the tightening by at least one direct torque indicating sensor; monitoring a magnitude of a reaction torque transferred via the housing during the tightening by at least one reaction torque sensor; comparing the monitored magnitude of the direct torque with the monitored magnitude of the reaction torque; and determining, based on the comparison, whether the accuracy of the delivered output torque is acceptable.

Method and device for tightening a threaded connection, preferably for connecting pipeline components, wherein the threaded connection to be tightened comprises a connecting element unit having an external thread, a connecting element unit having an internal thread, and a seal element arranged therebetween.