All components are developed and manufactured within the group of companies! Introducing high-performance and highly reliable seals.
The "magnetic fluid seal" is a sealing component that uses magnetic fluid, which has the property of adhering to magnets while being a liquid. It is used in semiconductor and other electronic component manufacturing equipment and analytical instruments to transmit rotational power within a vacuum chamber. All components are developed and manufactured within our group companies. We can respond to customer requests, including detailed design requirements. Additionally, as an agent for NTN Corporation, our expertise in bearings and our ability to propose and solve problems based on that knowledge are also our strengths. 【Features】 - A colloidal liquid with nano-sized magnetic particles dispersed in it - High heat resistance, eliminating the need for surrounding cooling mechanisms - Capable of achieving ultra-high vacuum with direct exhaust only, without differential exhaust - Excellent low outgassing performance - Expected to suppress the generation of by-products due to localized cooling in CVD equipment and similar applications *For more details, please refer to the PDF document or feel free to contact us.
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basic information
【Other Features】 ■ Excellent corrosion resistance and plasma resistance ■ Magnetic fluid is held along the magnetic lines of force formed between the shaft (rotating axis), magnet, and pole piece (magnetic pole segment) ■ Sealing (seal) is possible by forming a seal membrane (liquid O-ring) of the magnetic fluid ■ Unlike solid seals, it has the advantages of no wear, high lifespan, and low torque *For more details, please refer to the PDF document or feel free to contact us. 【Case Examples】 ■ Want to achieve reciprocating motion in a vacuum → Product proposal using a bellows structure ■ Measures against lubricant leakage from the bearing section → Proposal of suitable lubricants (collaboration proposal with NKL Corporation) ■ Consideration for use in high-temperature environments → Proposal for heat-resistant bearings and lubricants or water cooling mechanism proposal ■ Investigation response in case of malfunction → Comprehensive investigation including bearing investigation (conducted independently by our company) ■ Consideration for improvement measures → We will respond to consultations based on our track record (generally free of charge)
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Applications/Examples of results
【Applications】 ■Manufacturing equipment for semiconductors, LCD panels, solar panels, LEDs, etc. ■Industrial analysis equipment ■Clean robots, etc. *For more details, please refer to the PDF document or feel free to contact us.
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Company information
Daijiku Co., Ltd. was established in 1941 (the 16th year of the Showa era) as a specialized trading company dealing with bearings, referred to as the "rice of industry," in the midst of wartime. Since then, after undergoing numerous changes, we have built the foundation for today with the support of many "valued customers" and "suppliers."