Select country and language
The selected country and language determine your trading conditions, product prices and special offers
With effect from 25 May 2018, the current data protection legislation is amended. The General Data Protection Regulation of 27 April 2016 (hereinafter referred to as “GDPR”) is in force. Therefore, we address this information to our Customers and Potential Customers to inform you about how we process your personal data.
Your personal data controller, i.e. the entity which decides about the purposes and methods of processing your personal data is Transfer Multisort Elektronik sp. z o.o. with its registered seat in Łódź, address: Ustronna 41, 93-350 Łódź (hereinafter referred to as TME). Providing the data is voluntary, but necessary in order to conclude an agreement and subsequently provide the service as ordered.
Obtaining information on personal data processing
In matters relating to personal data protection, you can contact the Data Protection Officer at email@example.com or write a letter to our registered seat.
Data collection and the processing purpose
We process your personal data due to the fact that it is necessary for the performance of the contract concluded with you, i.e. the provision of the service (which is in accordance with Article 6(1)(b) of GDPR) including:
In addition, the law requires us to process your data for tax and accounting purposes.
Furthermore, we may process your data for marketing purposes, i.e. to promote our products and services. If we do this without the use of electronic means of communication, the legal grounds for carrying out such activities is Article 6(1)(f) of the GDPR, where conducting marketing activities is the legitimate interest of the Controller. On the other hand, if we use electronic means of communication for this purpose, i.e. e-mail, telephone, we process data only on the basis of your consent (which is in accordance with Article 6(1)(a) of the GDPR).
Your personal data may be transferred to other entities that process your data on their own behalf, including but not limited to:
Personal data retention period
Your personal data will be retained for the duration of a contract (performance of services) and after its termination:
Rights related to personal data processing
You have the right to access, rectify, delete, limit the processing of, transfer, object to the processing of and withdraw your consent to the processing of your personal data at any time, which shall not affect the lawfulness of processing based on consent before its withdrawal (provided that the processing is based on consent).
Furthermore, if you consider that the processing we carry out infringes the provisions of GDPR, you have the right to lodge a complaint with the data protection supervisory authority.
Automated data processing (profiling)
Your personal data will be processed automatically (including in the form of profiling), but this shall not have any legal effect on you or significantly affect you in a similar way.
Personal data profiling by TME involves the processing of your data (also by automated means), by using it to evaluate certain information, in particular to analyse or forecast personal preferences and interests.
Torque wrenches are basic tools which provide safe and accurate assembly of bolted joints. Let us take a look at how they work and learn about the wide selection of these tools on the market.
A torque wrench is a tool used for tightening or, less frequently, loosening bolted joints (screws and nuts) with a precisely defined force, or, more precisely – with a torque. Tightening the connections with a certain torque is crucial when installing and servicing various appliances. When adjusting the torque to the bolt connection, you should always follow the engineering guidelines.
The torque is the vectoral product of the force applied to the lever arm and the length of the lever. The torque is expressed in Newton metres (Nm). It means that if the bolt is tightened using a 50-centimetre long wrench with the force of 100 Newtons, then the torque which will tighten the screw thread is 50 Newton metres. In the UK and the US, torque is referred to using a different unit, namely a foot pound-force (ft lbf) – 1 Nm is approximately 0.738 ft lbf.
The tightening torque of the bolted joint affects the force that the screwed elements apply on the whole structure. In order to understand the importance the tightening torque, you need to comprehend the mechanics of the screw thread and its tightening process. Generally, a bolt can be compared to a spring. The more tightened it is, the more it extends and the stronger it tightens the bolted elements. Tightening the bolt extends its length proportionally to the applied torque, but this length is limited – just as it is the case with a regular spring. Once the yield strength of metal is exceeded, the spring will not return to its original shape. The same applies to a bolt.
An over-tightened bolt which is a subject to constant tension, will not apply enough force and most likely cause damage to the device – either through loosening (e.g. caused by vibration) or breakage of a deformed bolt. The bolt won’t be able to return to its original shape, so loosening and re-tightening it won’t be a safe solution.
In order to tighten the screw properly, the appropriate torque must be applied to it. To measure this torque, you need a torque wrench. Selecting the optimum tightening torque guarantees the following:
It is necessary to know the value of the torque with which the connection must be tightened. It depends e.g. on the material of the components, the size and the thread pitch, as well as the specific application.
When a threaded joint is not tightened enough, it can loosen further, e.g. due to vibration or the movement of the joined components. If, on the other hand, a bolted joint is overtightened, the thread material stretches and can be weakened, resulting in damage. It may have a permanent impact on the threaded components and, as a result, render them unusable. Overtightened bolts should be replaced with new ones.
Both under- and overtightening of a bolt may cause a malfunction. It is important to tighten each bolt or nut according to the values declared by the manufacturer. A tool used to apply a specific torque is a torque wrench. If properly calibrated, it improves safety and reliability of each critical threaded joint.
Most of the time, a torque wrench works like every other wrench. Only when the required torque is reached, the wrench mechanism is triggered. It prevents the wrench from exceeding the desired torque.
There are many torque wrenches with different internal mechanisms available on the market. One of the most popular torque wrenches is the so-called click-type torque wrench, with a special locking pawl (clutch) which prevents the wrench from operation once the desired torque is reached. It’s mechanism is similar to the ratchet wrench which drives only in one direction. The torque wrench clicks once the desired torque is exceeded.
Other torque wrenches available on the market are, e.g. break-back torque wrenches. The mechanism of these wrenches makes the upper part of the tool “breaks” by about 20 degrees after obtaining a given torque.
A separate group of torque wrenches are those equipped with a dynamometer, but without a torque limiter. Such a tool shows the value of the torque with which we are currently tightening a bolt or nut. In this category you will find simple beam and scale wrenches, but also complex electronic tools, often with a computer interface and memory which allows you to log in the number and torque of connections tightened during the day.
Torque wrenches are used in many areas of industry – wherever it is necessary to tighten components with a precisely defined torque. The basic application of a torque wrench is mechanic engineering – it is used in car workshops and other similar places where it is necessary to precisely tighten mechanical elements. However, these are not the only applications of torque wrenches. These tools are also frequently used in different fields of electronics and energy.
Torque wrenches are commonly used for tightening precision coaxial connectors in high-frequency systems. N, SC, SMA, SMC, SSMA SSMC, SSMA or TNC type connectors need to be tightened with the right torque to achieve their designed impedance and reduce losses. In addition, tightening such connectors with the right torque guarantees that the connector will not be damaged and it will be possible to repeatedly connect and disconnect it without deterioration of its electrical parameters. Another application of torque wrenches is tightening power busbars. Their use ensures optimal contact and low resistance of the connection.
However, such wrenches are used not only in mechanics or electronics. There are torque wrenches for such unusual applications as... dentistry – it is necessary to tighten dental implants with a specific torque in order to make them fit the human body perfectly.
The accuracy of torque wrenches, regardless of the application, is regulated by strict industry standards. The most important that are recognised in our country are:
Many types of torque wrenches are available on the market. The most commonly used ones include:
Beam torque wrenches – with a long pointer running from the head of the wrench along its handle. When you start to apply force to the wrench, its handle starts to bend slightly under the influence of the torque. At the same time, the pointer remains in place and starts to move along the attached scale, indicating the torque that is currently applied to the bolt. These wrenches require precision and skill as they do not automatically block any further movement. The user must observe the scale of the dynamometer to stop tightening as soon as the indicator shows the correct torque.
Wrenches with a round scale – they are a simplified version of beam wrenches. They have a circular scale on the handle, with a pointer which shows the current torque. They are simpler to use than beam wrenches because they have no external moving parts – all mechanisms of such wrenches are hidden inside the body.
Click-type torque wrenches – the most popular type of torque wrenches available on the market. In contrast to the two other types mentioned above, they allow for the maximum torque to be applied to the connection. To do this, simply turn the lower part of the key handle to set the required torque on the scale above the handle. The handle is then counteracted by a screw, so that it does not move during operation.
Beam wrenches are the most difficult of these three types to operate, but at the same time they offer the highest precision, which is surpassed only by very expensive electronic wrenches. Click-type wrenches are slightly less accurate, but they are sufficient for most applications, especially considering how easy it is to calibrate them. For most applications it is therefore best to choose this type of a tool.
The basic parameter of a torque wrench is the torque or the range of torques with which the screws can be tightened. The available ranges are vary from 2,5 Nm - 25 Nm up to 80 Nm - 400 Nm. WERA offers wrenches covering the entire range, so you can easily select the wrench for each application.
Torque grips are equipped with standard 1/2", 3/8" and 1/4" socket heads (depending on the size and torque range). These wrenches are complemented by standard socket accessories, such as joints or extensions.
Powered equipment places different demands on cells in terms of capacity, voltage or short circuit current.
Implemented accelerometers are used in airplanes, mobile phones, robots and many other applications. Find out what an accelerometer is, how it works and what are its types.
Optical and audible signalling applied in manufacturing systems and industrial equipment allows for clear communication of operating statuses, warnings, failures or dangers. Find out more about available types of signalling devices.
Battery terminals in combustion engine vehicles should be cleaned regularly, once every one or two years. Devices that had a battery leak should also be cleaned. Learn how to do it