How a PCL DVSA Approved Tread Depth Gauge is made
At PCL, we have been manufacturing our DVSA MOT Test approved tread depth gauge for over 70 years from our factory in Sheffield. Our gauges are widely used around the world, found in glove boxes, garages, and tyre shops, where they serve as a vital tool for ensuring tyre safety. These gauges play a crucial role in measuring tyre tread depth, helping drivers maintain proper tyre conditions and meet legal requirements.
But have you ever wondered how a PCL DVSA approved tread depth gauge is made? Let’s take you through the step-by-step process behind the manufacture of this essential tool.
Step 1: Machine and quality check the components
The first stage in the process takes place in our machine shop, where the individual components of the tread depth gauge are precisely machined. These components are carefully crafted to meet exact specifications, ensuring that the final product is of the highest quality. Once the parts are made, they undergo a rigorous quality check to verify that they meet our exacting standards and are free from defects.
Step 2: Roll mark the indicator in 1mm increments
The next step is to mark the scale on the indicator. The indicator is roll-marked with 1mm increments, spanning the full scale from 1mm to 26mm. This precision allows for accurate measurement of tyre tread depth. Additionally, we include a special mark at the 1.6mm point to indicate the legal minimum tread depth – a key feature for ensuring that tyres remain safe and legal for use on the road.
Step 3: Ink the indicator and let it dry
After the roll-marking process, the indicator is dipped in ink. This step enhances the visibility of the markings, making them easier to read. Once the ink is applied, the indicator is set aside to dry, ensuring that the ink has fully settled and bonded to the surface.
Step 4: Rumble to remove excess ink
To perfect the finish, a rumbler is used to remove any excess ink, leaving only the ink on the marked scale. This ensures that the gauge has a clean, precise appearance, with the markings clearly visible and free of smudges or unnecessary ink.
Step 5: Roll mark the PCL logo
Once the indicator is fully processed, the PCL logo is roll-marked onto the body of the tube. This final branding step signifies the quality and precision that goes into each and every one of our tread depth gauges, ensuring that they are easily identifiable as a PCL product.
Step 6: Hand assembly of the gauge
A PCL tread depth gauge is made up of five key components. These parts are carefully assembled by hand to ensure a perfect fit and optimal functionality. This manual assembly process guarantees that each gauge is built to the highest standards of quality and durability, providing a tool that can withstand the demands of everyday use.
Step 7: Monitor and set the depth rod
To ensure precise measurements, a monitor is used to set the depth rod. This step is critical, as it confirms that the tread depth gauge will provide accurate readings every time it is used. Accuracy is essential for safety, and we take extra care in ensuring that our gauges meet the highest standards of precision.
Step 8: Storing and shipping worldwide
After final checks, the gauges are stored in our warehouse, ready to be shipped to customers around the world.
The importance of regular tread depth checks
Measuring your tyre tread depth regularly is essential for safe driving. It's recommended to check your tyre tread at least once a month and before embarking on long journeys. Adequate tread depth ensures that your tyres maintain good grip on the road, especially in wet conditions, and helps prevent aquaplaning and other dangerous scenarios. The minimum legal limit for tread depth is 1.6mm, and using a PCL DVSA approved tread depth gauge ensures that you can easily and accurately measure your tyres to stay within legal requirements.
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