How to use a digital torque screwdriver? What the differences with preset types?

A torque screwdriver is a tool used to tighten screws with a precise amount of torque. Tightening screws incorrectly can lead to problems such as breakage or stripped threads. That's why torque screwdrivers are popular in factory work, where precise torque settings are essential for assembling compact electronic components or maintaining bicycles.

In this article, we'll introduce the features and usage of digital torque screwdrivers and discuss how they differ from preset types.



What's the Difference?

Torque drivers come in different types, but the two most popular ones are preset (slip) torque drivers and digital torque drivers. Both types have their own pros and cons, which we'll explore in this chapter by examining five key factors: Confirmation and Recording, Continuous Operation, Accuracy, Torque Range, and Features.


  Confirmation and Recording


When there's a need to confirm or record the torque during work, it's advisable to use a digital torque driver.
Unlike the preset type, the digital type can display the measurement result on the screen, which helps inspect the tightening torque values. Additionally, the digital type can record the final torque making it suitable for managing potential over-torque issues.


  Continuous Operation


Both preset and digital torque drivers can be used for continuous work by setting a target torque. The preset type is designed to slip and disengage when the target torque is reached, making it well-suited for continuous tightening work since it's less likely to over-tighten the screws.

On the other hand, the digital type can display the measured torque value, making it not only suitable for simple tightening work but also for tasks that require checking the measurement result one by one. Moreover, the digital type can set multiple target torques, which is useful for continuous work that involves switching between different torque values.




The level of accuracy of torque drivers may differ depending on the manufacturer and model. In general, digital torque screwdrivers offer higher precision. Furthermore, since they display the final torque on the screen, they can provide more accurate torque management.


  Torque Range


Proset Type
Digital Type
Model Number NM cNM Model Number NM cNM
 H5177  0.05-0.6 5-60  H5277  0.05-0.50 5-50
H5178 0.1-1.2 10-120 H5278 0.1-2  10-200 
H5182 1-6 100-600 H5279 0.2-4  20-400 
H5184 5-10 500-1000      




Preset (slip) torque drivers will disengage once the target torque is reached, minimizing the risk of over-tightening. However, they may produce some vibration when disengage happens, so it's essential to be cautious when tightening screws on precision equipment that are sensitive to shock or vibration.
In contrast, digital torque drivers can display the measurement result and even record it. They do not disengage, so there is no vibration will happen. However, there is a risk of over-tightening if you continue to tighten without releasing the force once the target torque is reached. Therefore, those who can not deftly control their force should be especially careful. 


Features of Digital Torque Screwdriver

Now that you have a better understanding of the distinctions between digital torque drivers and preset torque drivers.
Let's delve deeper into the characteristics of digital torque drivers.


 Check the Torque Through the LED Display

You can conveniently check the torque value on the LED display, enabling you to achieve higher levels of accuracy and precision in managing torque.

 Clear Warning Sound and LED warning

Changes in the torque value are signaled by both audible and LED notifications, allowing you to easily verify the reading even at angles where the screen is not visible.

 No Need to Manually Set torque Values One by One.

You can store up to 9 target torque set, making it convenient for tasks that involve switching between different torque values.

 Record and Manage Torque More Conveniently

The data memory can store up to 50 sets of torque data, allowing for easy management of torque data through the memory function.


How to Use a Digital Torque Screwdriver?

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In this section, we will provide a step-by-step guide on how to properly use a digital torque driver. We'll cover five topics, including Turning the power on and off, Setting the target torque value, Mode settings and memory data, How to use peak hold mode, and How to use track mode.




  Function of Each Button

  C Button:Reset

  U/S Button:Unit conversion

  M Button:Switch the target torque value.

  ^, v Button:Adjust the torque value.




  Turning the Power On and Off


To turn on the digital torque driver, press the C button. It will automatically turn off after 5 minutes of inactivity. Once turned on, the previously set target torque value and measurement mode will be retained.  You can directly use it if you do not need to change the settings. However, if you need to modify the settings or if it's the first time operation, follow the steps below to adjust the settings if necessary.


  Setting the Target Torque Value


1. Press the M button to choose the memory number that will be used to save the target torque value

2. Pressing the U/S button to convert the target torque to other units. please rewrite in native way.

3. You can adjust the torque value by using the up ^ and down v buttons, and the modified value will be automatically saved.


  Setting Mode and Memory Data


When you press and hold the U/S button, a setting screen will appear. This screen allows you to access three functions: "Switching modes", "Checking memory data", and "Deleting memory data." You can move between the setting items by pressing the U/S button.


Switching Mode

  1. You can switch between "Track Mode" (T) and "Peak Hold Mode" (P) using the ^ and v buttons.

  2. After adjusting the mode, press the U/S button to save the settings.


Checking Memory Data


  1. To check memory data, use the ^ and v buttons to select the desired memory data (up to 50 can be saved).

  2. Press the U/S button to move to the next setting item after you've finished checking.


Deleting Memory Data

  1. Press the C button twice to delete all memory data.

  2. If you do not want to delete the data, press the U/S button to return to the measure mode.


  How to Use Peak Hold Mode


Peak Hold Mode is a feature that continuously displays the maximum measured torque value.

You can follow these steps to use it:

  1. Tighten the screw.

  2. When you reach 90% of the target torque, the LED will flash green, and the buzzer will warn intermittently.

  3. Once the target torque value is reached, the buzzer will warn continuously, and the LED will light up in red.Stop working and the maximum measured value will be displayed on the screen.

  4. Press the M button to record the maximum measured value as memory data.

    If you do not want to record the value, press the C button to clear the measurement value and proceed to the next task.


 How to Use Track Mode


Track Mode is a mode that displays real-time torque measurement values.

You can follow these steps to use it:

  1. Tighten the screw.

  2. When tightening to 90% of the target torque, the LED will flash green and the buzzer will warn intermittently.

  3. When the target torque value is reached, the buzzer will sound continuously and the LED will light up in red. Stop working at the moment.

  4. Press the C button to clear the measurement value and proceed to the next task.



A digital torque driver with a screen display for direct measurement results is ideal for tightening and measuring tasks. With the ability to register target torque values, you can avoid the hassle of setting each value one by one. Additionally, it offers various convenient features such as data recording and transfer, as well as unit conversion.

If you are interested in a digital torque driver, please check out our selection!


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