Structure of plastic couplings
Actions to prevent set screws from becoming loose.For the set screws of plastic couplings it is necessary to observe the rated values for the fastening torque. This is because the margins for the strength of threads are less than those for metal products. On the other hand, the hub of the coupling deforms elastically(as shown in the figure) as the screws are fastened, and the overall hub functions to stop the set screws from becoming loose, like a spring washer. For this reason, the set screws do not become loose more easily than in the case of metal products. However, for special applications that require even stronger suppression of loosening, it is effective to use an adhesive substance, such as a thread lock.
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Durability of plastic couplings.
UJ/GJ
The graphs show relationship between life of couplings and load (torque, parallel misalignment or angular misalignment) on the results of durability tests. Under combined load conditions, extra margins should be added to the test results. The torque, parallel misalignment and angular misalignment are displayed as percentage values, by taking the catalog value as 100%. |
EGJ/EGP
The graphs show relationship between life of couplings and load (torque, parallel misalignment or angular misalignment) on the results of durability tests. Under combined load conditions, extra margins should be added to the test results.
The torque, parallel misalignment and angular misalignment are displayed as percentage values, by taking the catalog value as 100%.
Plastic couplings product list
Click on the picture to jump to product description.
UJ
| Outer diameter | 8-18 |
| Shaft diameter | 2-8 |
Features
・Flexible coupling utilizing the fatigue resistance of engineering plastics.
・Short sized coupling that accepts angular misalignment in standalone use.
・Set screw style.
GJ
| Outer diameter | 9-28 |
| Shaft diameter | 1.5-12 |
Features
・Flexible coupling utilizing the fatigue resistance of engineering plastics.
・Long sized coupling capable of absorbing both parallel and angular misalignments in standalone use.
・Set screw style.
EGJ/EGP
| Outer diameter | 22-28 |
| Shaft diameter | 3-12 |
Features
・Standardization of different diameter correspondence by sleeve press fitting.
・Eccentricity and declination even with single long body.
・Set screw style.