Guide for calibrating torque tester effectively

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Plastic bottles have found their way into a variety of applications, including food packaging, pharmaceutical packaging, and cosmetic packaging. One of the most important things for plastic bottle producers is to provide high-quality items to their clients. Thus, it is very important for the manufacturers to measure the force needed to open or close the PET bottles with ease. This can be done with the help of a Testronix cap torque tester. This lab testing instrument plays a significant role in the PET bottle manufacturing industry. This lab testing equipment plays a significant role in testing the quality of PET bottles and assessing whether these bottles are properly secured or not.

Here in this blog, we will discuss the use of torque testing instruments in the bottle industry and how you can easily calibrate this testing equipment with some easy-to-follow steps. So, let us get started!

How does the torque tester help to assess the quality of bottle caps?

A torque test is a necessary step in the process of screwing a CT cap onto a bottle. To guarantee that the threaded closure is correctly engaged, accurate torque control measurement is required. Many people feel that the tighter the seal, the less likely it is that a leak will occur. However, the contrary is true. The cap can shear away from the bottle's body, strip or jump the thread, or even shatter the closure if your bottle capping equipment has overly high torque. Thus, by using Testronix cap torque testers, it is important for you to determine the integrity of bottle caps.

This lab testing equipment will help you to assure that the bottle cap will be tight enough so that it will not get twisted or broken during the transportation and shipping. This torque testing machine is helpful in testing the amount of torque needed to open the closed bottle cap. We are considered to be the top torque testing instruments manufacturer that will help you to improve the standards of products.

Features of Testronix torque tester digital

Despite today's capping machines' being embedded with numerous remarkable features, such as precise clutches or a magnetic stop, there is still no direct means to measure application torque. As a result, measuring the removal torque is the only method to ensure that the cap has been correctly installed. Thus, with the Testronix torque testing instrument, you can assure that your PET bottle caps are properly intact.

Below we have listed the features of Testronix torque testing equipment.  

  • Strong clamping pegs/holders for zero slip gripping support
  • In-house calibration facility
  • Compact and lightweight, easy to move.
  • Adjustable clamping mechanism to hold the different sizes of bottles
  • Highly accurate torque scale
  • Mild steel material
  • 9 Sample readings can be saved on the digital readout
  • Safety lock pin to eliminate extra force on the Torque sensor.
  • Dimensions: 215x415x155mm
  • Opening and closing torque calculation accurately

These are the features of the torque tester digital model. It plays a significant role in testing the torque that is required to open a closed PET bottle.

Technical Specifications of Testronix torque tester digital

The Testronix torque testing instrument will work in accordance with industry standards and ensure that you will deliver accurate products to the customers. Below we have listed the technical specifications of this testing equipment.

  • Torque Range 20lb-inch, 25lb-inch, 50lb - inch 100 lb-inch
  • Accuracy ± ± 0.5 lb-Inch
  • Least Count/Resolution 0.1 lb-inch
  • Minimum Diameter for specimen holding 30 mm
  • Maximum Diameter for specimen holding 110 mm
  • The maximum size of test bottles to be tested is 2.5 liters

Optional accessories 

  • Torque range options available – 20lb-inch, 25lb-inch, 50lb - inch 100 lb-inch
  • Thermal print facility option available
  • Weights for calibration

With these features and technical specifications, you can easily conduct the torque test of multiway plastic bottles and other related products. Now, let us focus on the steps to calibrate the torque tester effectively.

Steps to calibrate torque tester effectively

Torque measurement equipment is calibrated to meet best practices and quality assurance criteria. Calibration is the process of comparing tools and measuring instruments to more precise standards. Thus, we have come up with one of the effective techniques that will be used for torque tester calibration.

  • Place the calibration weight of 10 lbs. on the left end side of the clamping unit with the help of thread and pass it through the pulley on the back.
  • While placing the weights make sure that the pulley and the screw of the clamping unit are on the same axis and there is a zero-angle made between them on the entire axis.
  • Remove the safety lock pin from the clamping unit.
  • If the readings shown on the load indicator are beyond tolerances, like 9.5 to 10.5 then set them using the limit switch and get values under tolerance.
  • First press the limit switch. While pressing the limit switch, press increment or decrement switches to bring the reading on the display under tolerance limits of respective weight. Set the value of calibration while pressing the “Limit” button continuously.
  • If these readings still are not under tolerance limits and fluctuating, then the readings need to be adjusted from the zero adjusting knobs given at the rear panel of the load indicator.
  • Adjust the readings by rotating the zero-adjustment knob and bringing the reading under the tolerance limit.
  • Repeat the same process as stated above for calibration with 20 lbs weight.

Once the reading on the load indicator is adjusted, the machine is properly calibrated. In this way, you can easily calibrate this testing machine accurately. You can also give us a call at +91 9313140140 or email us at Our experts will get in touch with you to assist you regarding all your queries.


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