Technology / product information

NIDEC OKK MACHINERY (THAILAND) Co., Ltd., a member of the Nidec Group, is based in Samut Prakan, Thailand, and provides high-quality manufacturing technology.
The BPD (Between Pin Diameter) measurement method, used to evaluate fit accuracy in spline machining, is characterized by its simplicity and flexibility. Even with low-cost measuring tools, it delivers highly accurate results. Proper BPD measurement significantly enhances product quality and reliability.

■ Features
・Convenience and flexibility: Using notched pins allows for compatibility with various spline sizes.
・High-accuracy evaluation: While precision depends on operator skill, formulas ensure reliable measurement results.
・Improved repeatability: Reduces variability across multiple operators, ensuring consistent measurements.
・Cost-effectiveness: Provides high-accuracy evaluations without requiring specialized measuring instruments.

■ Specifications
・Measurement method:
Measure the width of the parallel block (e.g., 24.955 mm).
Calculate the BPD using a formula (e.g., BPD = 24.955 + 10.0 = 34.955 mm).
・Equipment used: Parallel block, notched pins, gauge tools
・Precautions: For smaller BPD values, using parallel blocks may be limited; choose appropriate alternative methods.

■ Improving Measurement Accuracy
Conducting measurements with multiple operators minimizes individual errors, enhancing the reliability of results. Additionally, improving technician skills can further boost operational efficiency.

The BPD measurement method combines simplicity and precision, playing a vital role in quality control for spline machining. By utilizing this technique, product reliability is ensured, leading to higher customer satisfaction.

For more details, please download the PDF or feel free to contact us.