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One of the most common type of wrenches are torque wrenches. These tools are used specifically to apply a torque, or tightening, to a fastener, such as a nut or a bolt. Not only are these wrenches used for tightening, they also serve as measuring tools by allowing the handler of the tool to measure and set the torque of nuts and bolts, and other types of fasteners. The tool was invented in 1918 by Conrad Bahr, and was designed to prevent over tightening bolts on water main and steam pipe repairs underground. Paul Allen Sturtevant later perfected the tool and became the first individual to sell them. The torque wrench is a very simple tool to use.

There a several different types of torque wrenches. Some are more modern and more complex than others, but one of the simplest types is the beam type. The beam type was invented in the late 1920s/early 1930s by Walter Percy Crysler. It has a lever arm between the head and the handle of the wrench, which is made of a material which bends elastically in response to applied torque. The wrench also has an indicator scale that can show precisely the amount of torque that is applied. When the indicator scale shows that the desired torque is reached, the operator knows to stop applying force. Though the beam type is one of the most simple and inexpensive type, it is very precise and reliable. Beam types are however impossible to use in situations where the scale cannot be directly read, such as in automotive applications.

The deflective beam type is a more advanced version of the beam type. This wrench was invented about twenty years after the original beam type. This tool also provides more consistent and accurate readings throughout the range of each wrench. The deflective beam type allows the user to see and hear when the desired torque level is reached. A more improved version of the deflective beam type is the click type. This type of wrench uses a calibrated clutch mechanism to reach the desired level of applied torque. When the desired torque is reached, the clutch slips, preventing additional tightening. Various types of click type wrenches exist for different applications and different torque ranges. Click type wrenches are precise when they are properly calibrated; however the more complex mechanism can result in loss of calibration sooner than the beam type.

The most modern and sophisticated types of wrenches are electronic. These tools operate by modern electronics. Some of these wrenches are programmable, and they measure the tightening angle from the snug point as well as the applied torque. The mechatronic torque wrench is a combination of the click type and the electronic. This wrench provides both digital and mechanical readings on the torque, and is equipped with wireless technology to transmit the readings. All of the measurements are transferred and documented via wireless data transmission.

Company Profile:

Screwfix is the UK’s largest direct and online supplier of trade tools, accessories and hardware products. With over 30 years’ experience in the industry, we despatch tens of thousands of parcels every week for next day and weekend delivery to tradesmen, handymen and serious DIY enthusiasts all over the UK.

To view the full range of torque wrenches from Screwfix customers can visit our website here – http://www.screwfix.com/c/automotive/wrenches/cat810104.