ShanFeng Special Rubber Products Co., Ltd., operating under brand NQKSF since 1990, is one of a global leader in the sealing industry. Driven by innovation, quality, and excellence, it focuses on self-research and manufacturing oil seal and rubber sealing rings. With a wide range of sealing products for diverse industries, it adheres to global standards. NQKSF uses SAP ERP for efficient service and maintains large inventory. It has stable high-quality output and a strong global presence. Its spirit of innovation and craftsmanship helps it scale new heights.
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These products are widely used in diverse industries such as pump, motor, Industrial Machinery, Electronic Household, automotive, construction machinery, mining, wind power, and agriculture, providing high-performance sealing solutions to meet the needs of customers across the globe.
17 Sep 2026
The oil seal inside diameter is normally smaller than the shaft diameter because the sealing lip needs to be elastically deformed around the shaft. This difference creates radial contact between the lip and shaft, allowing the seal to maintain a seal...
17 Sep 2026
No. A larger oil seal interference does not automatically produce better sealing. The purpose of interference is to establish an appropriate contact condition between the sealing lip and shaft. Once the contact becomes excessive, the additional radia...
15 Sep 2026
The interference of an oil seal is not selected from the shaft diameter alone. It is determined by the relationship between the seal lip, shaft, sealing material, spring force, operating speed, temperature and other working conditions. In a rotary sh...
ShanFeng Special Rubber Products Co., Ltd., operating under brand NQKSF since 1990, is a global leader in the sealing industry.
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