The Art of Precision Manufacturing: Analysis of Concentricity Testing Technology and Industry Standards for Concrete Drill Bits

In the field of concrete core testing, the concentricity of the drill bit directly affects the drilling accuracy, equipment life, and construction safety. As an international brand that has been deeply involved in the manufacturing of building materials tools for 10 years, we provide high-precision drill bit solutions that meet international standards to global distributors through triple core technology and rigorous quality inspection system.

1、 Interpretation of Industry Core Standards

1.  Concentricity deviation ≤ 0.3mm

International standards such as JGJ/T384-2016 and DBJ/T 13-241-2023 require that the concentricity deviation between the drill bit body and the steel body should not exceed 0.3mm

Ensure a drilling accuracy of ± 0.05mm in super high-rise projects such as the S ã o Paulo Metro and the Burj Khalifa in Dubai.

2. Radial runout ≤ 1.5mm

Through dynamic balance testing, the radial runout of the drill bit remains stable below 1.2mm during high-speed rotation, which is 20% higher than the industry standard

2、 Four precise detection methods1. Micrometer method (traditional process validation)

Using a micrometer to measure the maximum and minimum runout difference during one rotation of the drill bit, with an accuracy of 0.01mm

The sampling rate for each batch is 30%, ensuring 100% compliance of the products leaving the factory.

2. High precision deflectometer (laboratory level testing)

Equipped with a digital deflectometer, it can synchronously measure radial and axial runout, with a resolution of 0.5 μ m meeting the requirements of EU CE certification

3、 Global Engineering Verification and Customization Services

Extreme environmental challenges:

Frozen soil construction: -30 ℃ low-temperature specialized drill bit, tested for dynamic impact (30 times/minute) without cracks

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High temperature scenario: patented design, fluctuation value ≤ 0.1mm in 50 ℃ environment

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• Customized solutions:

Regional adaptation: Adjust the tire body formula according to the rainy season in South America/humid and hot climate in Southeast Asia

Quick response: Supports full specification customization of 25-500mm, with a delivery cycle of 30 days

Certification Empowerment: Provide a complete set of qualification documents such as ISO9001

4、 Distribution cooperation value-added system

1. Worry free policy for damages

• Replace the drill bit with a new one for non-human damage

2 Profit Doubling Plan

Exclusive regional agents enjoy rebates

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