German HYDROKOMP coupling HYDROKOMP model HYDROKOMP price

HYDROKOMP coupling is a component that connects the prime mover to the driven machine. Its main function is overload protection. The torque limiter restricts the torque transmitted by the drive system by slipping when the required torque exceeds the set value due to overload or mechanical failure. It automatically re-engages once the overload condition disappears. This prevents mechanical damage and avoids costly downtime losses.

HYDROKOMP coupling manufacturing process

The jaw coupling is machined using turning, milling, and broaching, followed by overall heat treatment to ensure sufficient mechanical strength. There is also a cast jaw hub available on the market, which allows for mass production and eliminates machining waste, resulting in a much lower price compared to machined versions. However, the performance of cast components is not ideal, and their use is generally discouraged in critical applications. Furthermore, the jaws of cast hubs are prone to tooth breakage (jaw tooth detachment) under high-speed or high-load conditions. 1) Compact, backlash-free, with three different hardness elastomers; 2) Absorbs vibration and compensates for radial and angular misalignment; 3) Simple structure, easy maintenance and inspection; 4) Maintenance-free, oil-resistant and electrically insulating, operating temperature 20℃ to 60℃; 5) Jaw elastomers are available with four, six, eight, and ten lobes; 6) Fixing methods include set screw, clamping, and keyway fixation.

HYDROKOMP coupling features

Elastomers are typically composed of engineering plastics or rubber. The service life of the coupling is determined by the service life of the elastomer. Since elastomers are subjected to compression rather than tension, their typical service life is 10 years. Due to their cushioning and vibration-damping properties, elastomers are widely used in applications with strong vibrations. The performance limit temperature of the elastomer determines the operating temperature of the coupling, generally ranging from -35 to +80 degrees. Jaw couplings feature a simple structure, require no lubrication, are easy to maintain and inspect, are maintenance-free, and allow for continuous long-term operation. High-strength polyurethane elastic elements are wear-resistant and oil-resistant, offering high load capacity, long service life, and safe, reliable operation. They provide stable and reliable performance with good vibration damping, cushioning, and electrical insulation properties. They offer significant axial, radial, and angular compensation capabilities. The simple structure results in small radial dimensions, low weight, and low moment of inertia, making them suitable for medium to high-speed applications. Structural features: 1) Central elastomer connection. 2) Absorbs vibration and compensates for radial, angular, and axial misalignment. 3) Oil-resistant and electrically insulating. 4) Identical rotational characteristics in clockwise and counter-clockwise directions. 5) Set screw fixation.

HYDROKOMP coupling selection

Jaw couplings are mainly available in two types: the traditional straight-jaw type and the curved (concave) jaw zero-backlash coupling. Traditional straight-jaw jaw couplings are not suitable for high-precision servo drive applications. Zero-backlash jaw couplings evolved from the straight-jaw design but are specifically engineered for servo systems, commonly connecting servo motors, stepper motors, and ball screws. The curved design reduces deformation of the elastic spider and limits the effect of centrifugal force during high-speed operation. A zero-backlash jaw coupling consists of two metal hubs (typically aluminum alloy, with stainless steel also available) and a jaw elastic spider. The elastic spider has multiple lobe branches. Like a slider coupling, it is assembled by compressing the elastic spider between the two hubs, ensuring zero-backlash performance. Unlike slider couplings, which transmit torque via shear forces, jaw couplings transmit torque via compression. When using zero-backlash jaw couplings, users must ensure that the maximum load capacity of the elastic element specified by the manufacturer is not exceeded (while maintaining zero backlash). Otherwise, the elastic spider will be compressed and deformed, losing its elasticity and preload, thereby compromising zero-backlash performance. This issue may only be discovered after serious problems occur. Jaw couplings offer excellent balance and are suitable for high-speed applications (maximum speed up to 30000 rpm), but they cannot handle large misalignments, especially axial misalignment. Significant eccentricity and angular misalignment generate higher bearing loads than other servo couplings. Another important consideration is the failure mode of jaw couplings. If the elastic spider is damaged or fails, torque transmission is not interrupted; instead, the metal jaws of the two hubs engage directly to continue transmitting torque, which may lead to system issues. A major advantage of this coupling is the ability to select the appropriate elastic spider material based on actual application requirements. Some automation equipment companies offer various elastic materials for jaw spiders with different hardness and temperature ratings, allowing customers to choose materials that meet the performance standards of their specific applications.

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