German SBR coupling SBR model SBR price

SBR coupling is a widely used coupling, also known as a jaw coupling, consisting of two metal jaw hubs and an elastomer. The two metal jaw hubs are generally made of 45 steel, but aluminum alloy is also used when load sensitivity is required.

SBR coupling features

Diaphragm couplings can compensate for axial, radial, and angular misalignments between the driving and driven machines caused by manufacturing errors, installation errors, load deformation, and temperature rise changes. Diaphragm couplings belong to the category of flexible couplings with metallic elastic elements, relying on metal diaphragms to connect the driving and driven machines to transmit torque. They offer the advantages of elastic vibration damping, noise-free operation, and no need for lubrication, making them ideal products for replacing gear couplings and general couplings today. Main characteristics of diaphragm couplings: 1) Strong ability to compensate for misalignment between two shafts; compared with gear couplings, the angular displacement can be twice as large, the reaction force is small during radial displacement, flexibility is high, and certain axial, radial, and angular displacements are allowed. 2) Significant vibration damping effect, noise-free, and wear-free. 3) Suitable for operation in high temperatures (-80+300) and harsh environments, and can operate safely under impact and vibration conditions. 4) High transmission efficiency, up to 99.86%. Particularly suitable for medium and high-speed high-power transmission. 5) Simple structure, light weight, compact size, and easy assembly and disassembly. Assembly and disassembly can be performed without moving the machine (referring to the type with an intermediate shaft), and no lubrication is required. 6) Can accurately transmit rotational speed without slip, suitable for precision machinery transmission.

SBR coupling selection

Correct selection of diaphragm couplings: 1) A diaphragm coupling consists of at least one diaphragm and two hubs. The diaphragm is fastened to the hubs with pins and generally does not loosen or cause backlash between the diaphragm and the hubs. Some manufacturers provide two diaphragms, while others provide three diaphragms, with one or two rigid elements in the middle, connected to the hubs on both sides. 2) This characteristic of diaphragm couplings is somewhat similar to bellows couplings; in fact, the torque transmission method of couplings is quite similar. The diaphragm itself is very thin, so it bends easily when relative displacement loads occur, thus allowing it to withstand deviations of up to 1.5 degrees, while generating lower bearing loads in servo systems. 3) Diaphragm couplings are commonly used in servo systems; the diaphragm has good torsional stiffness, but slightly less than that of bellows couplings. 4) On the other hand, diaphragm couplings are very delicate and can be easily damaged if misused or incorrectly installed. Therefore, it is essential to ensure that the misalignment is within the normal operating tolerance range of the coupling. 5) Adjust the model according to the shaft diameter: The initially selected coupling connection dimensions, namely the bore diameter d and the bore length L, should meet the requirements of the driving and driven end shaft diameters; otherwise, the coupling specification must be adjusted according to the shaft diameter d. It is common for the driving and driven end shaft diameters to differ; when the torque and speed are the same but the shaft diameters differ, the coupling model should be selected based on the larger shaft diameter. In newly designed transmission systems, seven types of shaft bores specified in GBT3852 should be selected, with the J1 type shaft bore recommended to improve universality and interchangeability. The bore length shall comply with the i bearing coupling product standard.

SBR coupling abnormal noise troubleshooting

1) The gap between the two halves of the coupling is too wide, causing significant axial force on the diaphragm, leading to wear of the reamed holes or reamed bolts, resulting in abnormal noise; 2) Excessive axial misalignment or excessive angular misalignment between the two halves of the coupling can also cause vibration and abnormal noise during equipment operation; 3) Differences in speed between the driving and driven ends can also cause vibration and abnormal noise during equipment operation; 4) A malfunction in the motor's speed encoder disk causes the motor speed to fluctuate, resulting in abnormal noise from the diaphragm coupling.

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