Processing examples of NBR rubber gaskets
Supports small diameter hole drilling with water jet processing.
■Overview of Processing Example Dimensions: 50W × 80L (Thickness 3t) This example is a processing case of NBR rubber gaskets. The configuration consists of a plate shape with outer dimensions of 50W × 80L, featuring two 14φ holes in the center and four 9φ holes around the perimeter. For the small diameter hole drilling process, we adopted water jet processing because the accuracy of the hole diameter and the reproducibility of the hole position are directly linked to assembly accuracy. This method allows for cutting without thermal impact, thereby suppressing deformation of the rubber material and edge irregularities, ensuring stable dimensional accuracy. As a result, it prevents positional misalignment during bolt insertion and contributes to stable sealing performance at the equipment fixation points. ■Product Features (NBR Rubber) NBR (Nitrile Rubber) has excellent oil resistance and is an ideal synthetic rubber for seals in fuel oils and lubricants. It also exhibits high mechanical strength and wear resistance, making it widely used in O-rings, gaskets, hoses, and more. However, its weather resistance and ozone resistance are low, making it unsuitable for outdoor use, and it primarily excels in indoor hydraulic and pneumatic equipment.
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■Processing Method (Water Jet Cutting) A water jet is a hydraulic cutting machine that uses high-pressure water to cut materials. It processes by spraying high-pressure water. By changing the injection nozzle according to the processing material, high-quality products can be produced in a short time. Additionally, the dimensional tolerances that are typically associated with manual processing are significantly improved, resulting in stable processing accuracy. The taper on the cut surface from press processing can also be improved with water jet cutting.
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■Q&A Q: Do you have experience with small diameter hole processing? A: Yes, we have experience with small diameter hole processing using various rubber materials, including NBR rubber. Q: Is it possible to process rectangular shapes with multiple holes? A: Yes, it is possible. We will process it accurately based on the drawing data. Q: Can you accommodate small production runs and custom shapes? A: Yes, we can accommodate that. We will propose processing methods tailored to your application. ■Daiko's Capability At Daiko, we provide comprehensive support for various rubber gaskets, including NBR rubber, from material selection to processing method proposals and shape considerations. We flexibly respond to projects that require precision, such as small diameter hole drilling and multiple hole processing.
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Daiko is a manufacturer specialized in processing various industrial products, including gaskets and packing. With industry-leading processing equipment, including one of Japan's largest water jet cutting machines, and a wide range of materials such as joint sheets, rubber, resin, and metal, we meet our customers' diverse needs. Leveraging the technology and experience we have cultivated over 50 years, we provide high-quality, short-lead-time, and low-cost products to contribute to solving our customers' challenges. To respond to our customers' varied needs, Daiko's production bases are equipped with various processing facilities. Among them, the water jet cutting machines, with a total of four installed at our Osaka headquarters and Tokyo branch, boast one of the largest scales in the country. The maximum processing range is W4,000 × L5,500 mm, allowing for the high-precision manufacturing of large-diameter gaskets and packing. By maximizing material efficiency, we achieve the provision of 'high quality at low cost.'