rotary joints
swivel union is a fluid dynamic sealing device that transports fluid medium from a fixed pipeline to a pipeline or equipment that rotates or swings at a certain angle. Its core function is to establish a reliable connection between the stationary supply channel and the dynamically rotating components, achieving 360° continuous and leak-free transmission of various media such as gas, liquid, and oil
Below are our most trusted rotary joint series, available for standard or custom-engineered orders. As a manufacturer specializing in precision rotary sealing technology, SD SWIVELES Engineering Co., Ltd. brings together a dedicated team of certified mechanical engineers, application specialists, and production experts, each with decades of hands-on experience in the R&D of fluid transfer systems for paper, steel, rubber, plastic, and chemical processing industries.
High pressure direct rotating joint is a mechanical sealing device with two coaxial lines at both ends, used for leak free transmission of high-pressure fluids (water, oil, steam, etc.) under dynamic rotating conditions. Its core features include straight passage, low pressure loss, and pressure resistance
detail
The high-speed rotary joint of the machine tool spindle is a fluid sealed transmission component designed specifically for CNC machine tool spindles. Its core function is to transport coolant or hydraulic oil from a fixed pipeline to the rotating spindle at high speeds without damage, achieving dual effects of central cooling and hydraulic loosening
detail
The CNC machining center water outlet rotary joint is a high-speed fluid sealed transmission device designed specifically for the internal cooling system of machine tool spindles. Its core function is to continuously and leak free coolant (water/emulsion) from stationary pipelines into the high-speed rotating spindle center hole, achieving internal cooling and chip removal of the tool
detail
Deep hole drilling high-speed rotary joint is a key fluid dynamic sealing device designed specifically for deep hole machining machines such as gun drills, BTA drills, spray suction drills, etc. Its core function is to transfer high-pressure coolant or hydraulic oil from a stationary pipeline system to the rotating drill rod without leakage while the spindle rotates at high speed, in order to achieve chip removal, cooling, and lubrication, ensuring the accuracy and efficiency of deep hole machining
detail
The 902 series is a single channel "detachable" rotary joint designed for machine tool coolant or MQL (micro lubrication) working conditions, with the core feature of Pop Off ™ Technology can achieve infinite dry operation without medium pressure, preventing seal damage.
detail
The A10 series high-speed rotary joint is a high-speed center outlet/air type joint developed specifically for CNC machine tools, deep hole drilling, and automation equipment. Its core feature is to support switching between wet operation and high-speed dry operation
detail
The center outlet rotary joint is a precision sealing device designed to transport coolant and other fluids from a stationary pipeline to the center hole of a high-speed rotating spindle without leakage. Its core solution is to solve the medium transmission problem of internal cooling and tool loosening action in deep hole machining
detail
1117-404-406 is a 1117 series bearingless closed sealed rotary joint, designed for single channel transmission of coolant or MQL (micro lubrication). Its core features include full flow design, silicon carbide balanced mechanical seal, and anodized aluminum shell, suitable for high-speed automatic lines and machine tool spindle cooling scenarios.
detail
1117-058-116 is a 1117 series bearingless "closed sealed" rotary joint, specifically designed for high-speed machine tool coolant or MQL micro lubrication delivery, using an axial connection configuration
detail
902-111-165 is a 902 series "detachable" single channel rotary joint, designed specifically for coolant or micro lubrication (MQL) conditions. Its core features include support for pressure free infinite dry operation and full flow anti clogging design.
detail
902-121-188 is a 902 series single channel "detachable" rotary joint, designed for conveying cutting fluid or MQL oil mist at high speeds and supporting pressure free dry operation
detail
2620-500-252 rotary joints are high-precision dual-channel rotary connectors designed for industrial high-speed precision machining equipment. Adopting balanced pressure sealing technology, low-resistance bearing assembly and high-strength integrated structure, these rotary joints support 360° uninterrupted high-speed rotation, realizing stable, low-heat and leak-free transmission of cooling water and hydraulic oil for CNC machine tools and automated processing systems.
detailFrom precision machining to seal testing, every step follows international standards (ISO 9001, CE, ATEX) — delivering reliable fluid transfer solutions for paper, steel, chemical, rubber, and plastics industries.
High-precision CNC machining centers with micron-level tolerances ensure rotational stability and seal integrity, even at high speeds and demanding operating conditions.
316L stainless steel, alloy steels, silicon carbide, and carbon graphite — selected for maximum corrosion resistance, wear resistance, and compatibility with steam, hot oil, water, and air.
Balanced seal design with silicon carbide/graphite seal rings delivers ultra-low leakage rates under high-temperature and high-pressure conditions, ensuring extended service life and reduced maintenance.
20+ years of rotary joint engineering experience — offering customized design, sizing guidance, material selection, and on-site technical support for your specific application.
SDSWIVELES integrates 20 years of engineering experience with German-inspired quality management systems to form a standardized production process for precision rotary joints.
Every rotary joint undergoes a documented manufacturing sequence: precision CNC machining, seal face lapping, assembly, and final inspection. Each unit is traceable with individual quality records and serialized documentation.
Our quality department operates with full independence and authority to halt production if standards are not met. Dimensional tolerances are verified to ±0.01mm, and all units are pressure-tested to 1.5x working pressure before shipment.
Triple validation: "dimensional reports + material certifications + performance test records." Product qualification rates remain stable above 99%, eliminating performance variations and ensuring long-term operational reliability.
In the dynamic world of industrial manufacturing, every operation faces unique challenges. At SDSWIVELES, we tailor our engineering expertise to empower your success.
We help you optimize existing equipment with upgraded rotary joint solutions that reduce downtime, improve energy efficiency, and lower maintenance costs. Whether you need to replace aging components, enhance performance while meeting stricter industry standards, or adapt to evolving production demands — we deliver solutions that keep your operations running.
Stand out in a competitive market with custom-engineered rotary joint solutions that integrate seamlessly with your equipment designs. We support custom connection configurations, material specifications, compact form factors, and performance validation — helping you deliver reliable machinery to your customers.
Turn your engineering concept into reliable, production-ready hardware with our end-to-end partnership. From application analysis, material selection, prototyping, manufacturing oversight, to compliance testing — we guide you through every step of your journey from idea to implementation.
Get expert guidance on the right formulation for your brand — standard or custom-engineered, with low MOQ and free sample support.
Request a Free Sample