FAQ.
Here you will find frequently asked questions about torque wrenches, testing and calibration technology, software, insert tools, ratchets and fine-tooth ratchets, screwdrivers, spanners, pliers and training.
Torque wrenches, testing and calibrating technology.
If the load is applied in a uniform manner and without jerky stress peaks, it is called a static load. Click type torque wrenches automatically generate a certain dynamic load due to the release of the physical mechanism.
Yes, once you have completed a training course at STAHLWILLE in Wuppertal or with an authorised body in connection with exports, for which a fee is charged. Authorisation is documented by a corresponding certificate. After you receive the certificate, you can also order spare parts.
You will find many handbooks and further information in our download section.
Yes, STAHLWILLE torque wrenches can also be used to undo/loosen bolted connections. However, please make sure to respect the information in the respective operating instructions. The load must never exceed the nominal value (highest measuring range value) of the wrench.
Laboratory transducers type 7728 are physically compatible with the housing of the workshop torque tester, type 7707W, up to the rated torque of 200 N·m. Above the nominal range 400 N·m, the diameter of the transducer is too large.
With testing, the torque tool is actuated manually. With calibrating, the tool being tested must be actuated by a system. It does not matter whether this is by means of a motorised unit or using a hand crank.
In most cases, adjustments of digital STAHLWILLE torque and angle-controlled units can be carried out fully automated with the aid of the motorised PerfectControl calibration systems or manually on the 730D, TTS and 714/766 systems. Please read the respective operating instructions.
Please read the respective operating instructions. The 730/730Quick/730Fix/720/721 have 2 adjusting screws to set the lower and upper values individually. It is necessary to use a calibration system to verify the values.
Please refer to the instructions in Extract from the STAHLWILLE product catalogue. With digital systems, you can enter the modified extension values in the system and the system calculates the correction.
This is not recommended, as the transducer itself has been stressed/calibrated with a measuring shaft using torsion which means measurements will show incorrect results in the event transverse forces are applied, e.g. when used for torque wrenches.
It is not possible to quantify that.
After implementation of the new calibration standard DIN EN ISO 6789:2017, manufacturers are required to indicate to the user if a torque wrench is operated in range beyond the calibrated range. At STAHLWILLE, we show this by making the display flash. The display is stable if used within the calibrated range.
From 1993 onwards, we have provided every torque wrench with a serial number. If your torque wrench does not have a serial number, it was produced before 1993. If you can see a serial number, look at the 2nd and 3rd digits. They show the year in which the wrench was manufactured. For example: SN 122xxxxx, this wrench was made in 2022.
Of course, you can have any of our torque transducers DAkkS calibrated by us. You can find the corresponding accreditation document in the download centre on our website.
None of our torque products is ESD capable but you will find several VDE torque wrenches in our VDE product range.
Please note the IP-class of the torque wrench in concern. In general, use under water is not recommended for any of our torque products, as it may result in extreme damage, up to and including destruction of the electronics or mechanical systems.
STAHLWILLE does not use a compression spring as the measuring element in its mechanical torque wrenches with a scale, but a freely floating flexible rod. This flexible bar is not subject to any load when not in use and therefore does not wear out. Furthermore, adjusting the values is very easy and lightning fast.
With very few exceptions, all torque wrenches can be recalibrated on STAHLWILLE calibration systems. The exceptions here can be wrenches with a large release angle or freewheel or with slip clutch mechanisms. In addition, excessively long or very short torque wrenches might be unsuitable due to the space available.
All this information can be found in the operating instructions under the heading "Maintenance". We recommend "Fin Grease MP 2/3" from the manufacturer "Interflon".
Transducers of the types 7721-7724, 7727 and 7728 only allow purely static torque measurement. This means that impact, pulse and shut-off tools cannot be tested or calibrated with this measuring equipment.
The transducer has been blocked by the firmware due to an overload and needs to be checked at the service centre in the Wuppertal factory. Please use our service portal on our website.
The transducer has been blocked by the firmware due to an overload and needs to be checked at the service centre in the Wuppertal factory. Please use our service portal on our website.
Laboratory transducers type 7728 are physically compatible with the housing of the workshop torque tester, type 7707W, up to the rated torque of 200 N·m. Above the nominal range 400 N·m, the diameter of the transducer is too large.
Yes, indeed, you can be accredited by DAkkS with both the manual (handwheel) calibration systems and with the motor-driven calibration systems, for torque according to DIN EN ISO/IEC 17025/2018.
Since 1 March 2018, STAHLWILLE has supplied all torque certificates in accordance with DIN EN ISO 6789-2:2017. In addition to the well-known maximum display deviation, the total uncertainty of measurement is also indicated. Every user of this torque wrench or torque screwdriver must decide for themselves whether they can use this product for the current application or not. If you do not have any experience or specifications in this area, you can still use the specified maximum display deviation as a guide.
No, both figures stand on their own, although the display deviation value does contribute marginally to the uncertainty calculation.
No, unfortunately not anymore. Since we implemented the new calibration standard DIN EN ISO 6789:2017, this is no longer possible.
All maintenance work on STAHLWILLE digital systems is carried out exclusively at the Wuppertal plant.
Only partners & customers trained and authorised by STAHLWILLE can receive the relevant documentation to obtain spare parts for torque products. Find out more about our training courses on our website.
With very few exceptions, all torque wrenches can be recalibrated on STAHLWILLE calibration systems. The exceptions here can be wrenches with a large release angle or freewheel or with slip clutch mechanisms. In addition, excessively long or very short torque wrenches might be unsuitable due to the space available.
Only DAkkS certificates may bear that logo. Factory calibrations are excluded from this.
Software.
This software is available on payment of a fee. Please send us an email stating the physical Mac address(es) of the PC/laptop etc. on which the Sensomaster Live software is to be installed. In addition, we request that you send us the invoice for this software.
Please download the latest software and firmware from the download centre on our website.
Simply copy the TORKMASTER database and store the copy on a secured medium or network.
Both databases must be on your PC/system. You then need to apply the TORKMASTER 3 import tool from the TORKMASTER 4 directory.
Firstly, the installation of the latest software TORKMASTER 3.11 and TORKMASTER 4.8.2 is required. There must be 3 databases on your PC/system. TORKMASTER 3/4 and TORKMASTER 5. Then you must apply the TORKMASTER 3 import tool from the TORKMASTER 4 directory and then the TORKMASTER 4 import tool from the TORKMASTER 5 directory.
Both databases must be on the same PC/system. Then you can apply the TORKMASTER 4 import tool from the TORKMASTER 5 directory.
No, unfortunately not. It is possible to generate certificates in accordance with DIN EN ISO 6789:2003 and both parts of DIN EN ISO 6789:2017 using TORKMASTER 5.x. From version TM 5.3, it is also possible to generate machine capability test (MCT) documents.
All current software from STAHLWILLE is WINDOWS 10 compatible.
The driver can be downloaded free of charge from our website at any time after registration.
Insert tools, ratchets and fine-tooth ratchets.
Simply open the ratchet, clean, oil and reassemble it. If any parts are faulty, please use the respective repair kit.
Due to the risk of accidents (chipping of chrome and metal parts), chrome-plated tools should generally not be used on impact wrenches.
Use a very thin light-running oil or gun oil. Due to their viscosity, greases would cause the mechanical parts to stick together and the tool would become difficult to use.
Screwdrivers, spanners, pliers & cutters.
All grips on STAHLWILLE products are resistant to Skydrol and other substances.
There are currently no further sizes planned for the 240 series. But if you would like to be informed about new products as they are released, you can subscribe to our newsletter here.
Training workshops.
You are welcome to explore our numerous training courses on our website.