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Manual Tightening Learning Journey: how to choose the proper Mechanical wrench

Make sure to pick the perfect tool for any application!

After focusing on Mechanical Wrenches and Error-Proofing Wrenches, in this Chapter of the Manual Tightening Learning Journey we will learn how to choose the best tool for your needs, particularly among mechanical wrenches.

Correct wrench capacity

Deciding which wrench capacity is best for each application is essential in order to avoid higher applied torque, which can lead to reduced durability and increased risk of overloads and damage to the tool itself. 

Our wrenches are designed to work with the best performance up to 80% of their nominal capacity: higher applied torque will increase the friction inside the wrench mechanism and, therefore, will require more maintenance. 

Select the right Mechanical Wrench

Choosing the right tool for each application is essential and can significantly reduce operational failures during the assembly.

Atlas Copco‘s portfolio offers three different types of Mechanical wrenches:

  • Click wrenches (CWR) 
  • Break wrenches (BWR)
  • Camover wrenches (SWR)

First of all, it is necessary to check the torque range for your desired application. 


When the torque is below 300Nm, and the minimum torque must be assured, the CWR will be the best choice for you.


BWR is perfect for reducing overloads, especially when the torque is over 300Nm. Very robust, it requires low maintenance while significantly reducing joint overloads compared to a click wrench.


However, some applications may be very sensitive when going above the torque limits. Through a Camover wrench such as the SWR, it is no longer possible to overload the joint thanks to the inner slip mechanism.

Find the previous Manual Tightening Learning Journey two chapters here below:

Aerospace Error Proofing Automotive Quality Assurance General Industry Articles Quality Ergonomics and Safety Rail Industry Industry 4.0 & Smart Connected Assembly Assembly Tools