German Ringfeder Gerwah couplings, Ringfeder Gerwah models, Ringfeder Gerwah prices

Ringfeder Gerwah couplings are divided into two main categories: convex and concave. The convex type is further divided into three types: integral with skeleton, integral without skeleton, and radial slit. The inner side of the tire ring is bonded to the steel skeleton by vulcanization, and nuts are welded at the bolt holes on the skeleton. During assembly, bolts are used to connect the flanges of the two coupling halves. Torque is transmitted by the friction generated between the tire and the flange end faces when the bolts are tightened. The tire ring undergoes torsional shear deformation during operation, so tire couplings have high elasticity, a large ability to compensate for relative displacement between two shafts, good damping, simple structure, no need for lubrication, and are relatively convenient to assemble, disassemble, and maintain. Their disadvantages include low load capacity and large external dimensions. As the relative torsion angle between the two shafts increases, the tire shape becomes distorted, and the axial dimension slightly decreases, generating significant additional axial forces on the two shafts, which increases bearing load and reduces service life. When tire couplings operate at high speeds, the outer edge of the tire expands outward due to centrifugal force, further increasing the additional axial force. Therefore, measures should be taken during coupling installation to make the stress direction in the tire opposite to the stress direction generated during operation, thereby offsetting part of the additional axial force and improving the working conditions of the coupling and the two bearings.

Ringfeder Gerwah Coupling Introduction

Any deviation in the system will lead to premature damage to the shaft, bearings, or coupling, meaning it cannot be used in high-speed environments because it cannot compensate for relative shaft displacement caused by high temperatures generated during high-speed operation. Of course, if relative displacement can be successfully controlled, rigid couplings can also perform excellently in servo system applications. In particular, small-sized rigid couplings have the advantages of light weight, ultra-low inertia, and high sensitivity. In practical applications, rigid couplings offer maintenance-free operation, strong oil resistance, and corrosion resistance. Although people previously disagreed with using rigid couplings in servo drives, due to their high torque capacity, rigidity, and zero-backlash performance, small-sized aluminum alloy rigid couplings are increasingly being used in motion control fields.

Ringfeder Gerwah Coupling Classification

Rigid couplings are divided into flange couplings, radial key flange couplings, sleeve couplings, clamp shell couplings, and parallel shaft couplings. Flange coupling: A coupling that uses bolts to connect the flanges of two coupling halves to achieve shaft connection. Radial key flange coupling: A coupling that uses radial keys and standard bolts to connect two coupling halves. Sleeve coupling: A coupling that uses a common sleeve to connect two shafts in some manner. Clamp shell coupling: A coupling that uses two axially split clamp shells to clamp and achieve shaft connection in some manner. Parallel shaft coupling: A coupling that uses an intermediate disc and pin shafts to achieve connection between two parallel shafts.

Ringfeder Gerwah Coupling Mechanical Properties

The heating temperature for rigid couplings is typically 560~600℃, with a hardness requirement of HRC22~34. Since the purpose of quenching and tempering is to obtain comprehensive mechanical properties, the hardness range is relatively wide. However, if there are hardness requirements on the drawing, the tempering temperature must be adjusted according to the drawing requirements to ensure hardness. For example, some shaft parts require high strength and thus high hardness; while some gears and shaft parts with key slots require lower hardness because milling and broaching processes are performed after quenching and tempering. Regarding tempering holding time, it depends on hardness requirements and workpiece size. We believe that hardness after tempering depends on tempering temperature and has little relation to tempering time, but thorough tempering is required. Generally, the tempering holding time for workpieces is over one hour. Cr can increase the hardenability of rigid couplings, improve steel strength and tempering stability, and provide excellent mechanical properties. For large cross-section or important quenched and tempered workpieces, Cr steel should be used. However, Cr steel exhibits second-type temper brittleness. From the perspective of international development trends, new-generation CNC machine tools are developing towards ultra-high speeds to improve production efficiency, using new functional components (such as electric spindles and linear motors) to achieve ultra-high-speed machining. The electric spindles and linear motors required for rigid couplings are directly connected to the motor and spindle via expansion locking connection sets, eliminating intermediate components such as gearboxes to achieve ultra-high speeds. A single CNC machine tool requires at least five to six sets of couplings, and up to fifty to sixty sets. This indicates a very large market. The German Ling Si rigid coupling industry is becoming increasingly popular. Combined with factors such as corporate management, we will analyze what trends the coupling industry will present in the near future.

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