What everyone ought to know about bolting tools.

 What everyone ought to know about bolting tools.

In the industrial world, there are several types of bolting tools available. Before knowing about the different types of bolting tools, it’s necessary for you to know what exactly they’re in general. Bolting tools are used to loosen or tighten a fastener (nut or bolt) by exerting an adequate amount of torque on it. According to Newton’s third law of motion, every action possesses an equal and opposite reaction. With that said, when you apply a high torque, the wrench would need a reaction arm to lock at an adjacent point. To begin the process of bolting, the fastener is lubricated. Now when you’re clear with the basics, let’s have a look at the different types of bolting tools with their advantages and disadvantages. 

  • Pneumatic Torque Wrench 

Pneumatic torque wrenches are powered by compressed air and are one of the most popular types of bolting tools in the automobile industry. It has an accuracy of +/- 5% and provides a very fast operation. However, to use them, you must have a constant supply of high air pressure. Due to this, the tool is disallowed to be used at greater heights. There are several modern pneumatic torque wrenches with improved productivity and dual-speed mode. Moreover, there are modes such as rundown and torque precision that provide a faster and precise tightening of nuts and bolts. 

  • Hydraulic Torque Wrench 

Hydraulic wrenches are in no doubt, the most popular type of bolting tool in the industry. They’re powered by hydraulics (mostly oil) using an electrically or pneumatically driven hydraulic pump. As it provides the highest power to weight ratio, it is used commonly. With an accuracy of +/- 3&, they also provide one of the most accurate torque outputs. Due to this, they’re also very flexible and portable to use. Broadly, there are two major types of hydraulic torque wrenches namely direct fit (hex) and square drive (external socket) variants. They’re also capable of achieving a high torque value. Due to this, you need to take care of the placement of the reaction arm to keep the housing arm of your tool protected from any kind of external force. 

The best way to place the external arm is to keep its plane parallel to the bolt’s axis. Talking about square drive hydraulic torque wrenches, they have reaction arms placed on the cylindrical portion of the tool. Apart from these wrenches, other tools with reaction arms on cylindrical portions have the disadvantage of not having the reaction arm parallel to the bolt’s axis. If the reaction arm is placed at the front part of the tool, you may get a plane of 360-degrees with a square drive wrench. The reaction arm will always be parallel to the bolt’s axis on rotation. This provides you a stress-free cylinder. 

  • Electric Torque Wrench 

Unlike pneumatic and hydraulic torque wrenches, electric ones don’t need compressed air or a pump to power them up. They simply run on electricity by having a direct connection to the power source like a socket. Although they have an accuracy of +/- 5%, they still can’t be used for a variety of industrial applications because there’s a risk of spark generation. This can cause a great risk in explosive industries like petrochemical, oil & gas, and mining. Moreover, they’re also very heavy and unbalanced.

Battery Torque Wrench 

A battery torque wrench is one of the most modern and developed bolting tools in the entire industry. They offer great portability and operate on a battery without the need for any compressed air or pump. The battery is placed at the bottom panel of this tool and it provides an accuracy of +/- 5% just like pneumatic and electric torque wrenches. The only drawback of this tool is that the maximum torque capacity is lower in this tool as compared to the pneumatic and hydraulic torque tools. 

The Takeaway

Summing it up, there are a lot of bolting tools designed on the basis of different industrial requirements to provide appropriate solutions. The customer can choose from a wide range of wrenches based on the flexibility they’re looking for. 

Content Sources :- ABSGroup

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