German SFERAX coupling SFERAX model SFERAX price

SFERAX couplings connect two flanged half-couplings to their respective shafts using standard parallel keys, and then bolt the two half-couplings together to transmit motion and torque. This type of coupling has two main structural forms: (1) alignment of the two shafts is achieved by bolts in reamed holes, with torque transmitted through compression and shear on the bolt shanks; (2) alignment is achieved by mating a spigot on one half-coupling with a recess on the other. The bolts connecting the two half-couplings can be grade A and grade B standard bolts, with torque transmitted via the friction moment at the joint interface of the two half-couplings.

SFERAX coupling features

Due to their simple structure, low cost, and ability to transmit high torque, they are often used when speeds are low, there is no shock loading, shaft rigidity is high, and alignment is good. Flange couplings (also known as flanged couplings) use bolts to connect two flange-type half-couplings, with each half-coupling keyed to its shaft to achieve shaft connection and transmit torque and motion. Flange couplings have a simple structure, are easy to manufacture, have lower costs, operate reliably, and are easy to install, disassemble, and maintain. They can transmit high torque and ensure high alignment accuracy between the two shafts. They are generally used in shaft transmissions with stable loads, high speeds, or high transmission precision requirements. Flange couplings do not provide radial, axial, or angular compensation. If alignment accuracy of the connected shafts cannot be ensured during use, the service life, transmission precision, and efficiency of the coupling will be reduced, causing vibration and noise. For rigid couplings, depending on the magnitude of the transmitted torque, all bolts on the flanges can be fitted bolts, or half can be fitted bolts and the other half standard bolts. Rigid couplings are lightweight, have low inertia and extremely high sensitivity. In practical applications, rigid couplings are easy to maintain and resistant to oil and corrosion. In high-speed environments, they can compensate for relative displacement generated by high-speed operation. Of course, if relative displacement can be successfully controlled, they can also perform excellently in servo systems. [1 rigid coupling structural forms: A rigid coupling consists of two half-couplings with grooves on their end faces and an intermediate disc with teeth on both sides. Since the teeth can slide in the grooves, it can compensate for relative displacement between the two shafts during installation and operation. The rigid coupling also includes two shaft sleeves and a central steel shell, where the central steel shell is the torque-transmitting element. The above is some basic knowledge about rigid couplings shared with you, hoping to help users who are confused in this area. If you have any questions, please contact our factory, and we will find a way to help you solve them.

SFERAX coupling relative motion

Rigid couplings are composed of rigid force-transmitting components. There is no relative motion between the connected parts, so they do not have the ability to compensate for relative misalignment of the two shaft axes. They are only suitable for applications where the two connected shafts can be strictly aligned during installation and no relative offset occurs during operation. Flange couplings have no elastic elements and do not have vibration damping or buffering functions. They are generally only suitable for operating conditions with stable loads and no impact or vibration. Rigid couplings were formerly known as fixed rigid couplings, including flange couplings, radial key flange couplings, floating shaft couplings, clamp-shell couplings, and sleeve couplings. Rigid couplings generally have a simple structure and lower manufacturing costs. When selecting a rigid coupling, try to minimize the alignment error of the axes of the two connected shafts. To reduce the impact of additional loads on the coupling, try to minimize the distance between the coupling and the bearings. Flange couplings (also known as flanged couplings) use bolts to connect two flange-type half-couplings. Rigid couplings have two main structural forms: (1) alignment of the two shafts is achieved by bolts in reamed holes, with torque transmitted through compression and shear on the bolt shanks; (2) alignment is achieved by mating a spigot on one half-coupling with a recess on the other. The bolts connecting the two half-couplings can be grade A and grade B standard bolts, with torque transmitted via the friction moment at the joint interface of the two half-couplings. Materials for rigid couplings can be gray cast iron or carbon steel. For heavy loads or when the circumferential speed exceeds 30 m/s, cast steel or forged steel should be used.

SFERAX coupling disassembly method

Professional rigid coupling manufacturers teach you the correct rigid coupling disassembly method. Before disassembling a rigid coupling, mark the relative positions of the various components to serve as a reference for reassembly. For LingSi couplings used in high-speed machinery, the connecting bolts are weighed, and markings must be clear and not mistaken. When disassembling a coupling, generally remove the connecting bolts first. Due to the deposition of oil sludge, corrosion products, and other deposits on the thread surfaces, bolts are not easy to remove. Especially for severely rusted bolts, disassembly is very difficult. [Appropriate tools must be selected for removing connecting bolts, because if the external hexagon or internal hexagon load-bearing surfaces are slipped or damaged, disassembly will be more difficult. For bolts that are already rusted or have significant oil sludge, solvents (such as rust removers) are often sprayed on the connection points between the bolts and nuts, allowing the solvent to penetrate into the threads, making it easier to disassemble the rigid coupling.

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