Technical Data Coupling Handling
ECHT-FLEX Coupling NES Series Handling
1. Handling the coupling
Read the instruction manual carefully to understand the proper method of handling couplings.
Since NES Series ECHT-FLEX couplings are delivered as a completed assembly (finished bore), the coupling can be directly mounted to your equipment. Mount the coupling to the shaft according to the following procedure.
When mounting the coupling, be careful not to apply excess force to the coupling, and be sure not to drop the coupling.
Never loosen the hexagon socket head bolt that fastens the disk.
The operating temperature range is –30 to 100°C.
2. Mounting the coupling to a shaft
- (1) Use a cloth to wipe any dust and oil completely off the surface of the target shaft and the coupling mounting surface.
- (2) Center the shaft to mount the coupling on, then attach the coupling to it. When attaching the coupling, insert the shaft all the way to the clamp hub end face.
The coupling’s allowable angular misalignment, allowable parallel misalignment and allowable end play (shaft direction displacement) are all correlated to each other. Increasing one factor decreases the others, so the factors need to be considered together. Perform the centering adjustment while referring to the following instructions
When using the spacer type
Convert the parallel misalignment into an angular misalignment (Graph 1).
Apply the total of the converted value and angular misalignment to the angular misalignment shown in Graph 2.
Adjust the centering condition so that the misalignment does not exceed the range specified for each size.
(Graph 1)Spacer type
(Graph 2)Spacer type
When using the single disk type
The single disk type can only absorb a very small amount of parallel misalignment, so should be centered mainly by adjusting the angular misalignment and end play (shaft direction displacement).
Graph 3 shows the correlation between a coupling’s allowable angular misalignment and allowable end play (shaft direction displacement).
Adjust the centering condition so that the misalignment does not exceed the range specified for each size.
- (3) Make sure that the mounted coupling can be moved in the rotating and axial directions with only a light force when the clamp bolt is loosened. If the coupling cannot be moved smoothly, re-adjust the centering condition in Step (2).
- (4) Tighten clamp bolts to the tightening torques shown in the table below.
(Graph 3)Single hub
| Model No. | NES07 | NES15 | NES20 | NES30 | NES50 | NES70 | NES100 | NES250 | NES800 | NES1300 | NES2000 | NES3000 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clamp bolt size | M2 | M2 | M2.5 | M2.5 | M3 | M3 | M4 | M4 | M6 | M6 | M8 | M8 |
| Tightening torque N・m {kgf・m} |
0.50 {0.05} |
0.50 {0.05} |
1.0 {0.10} |
1.0 {0.10} |
1.9 {0.19} |
1.9 {0.19} |
3.8 {0.39} |
3.8 {0.39} |
12 {1.22} |
12 {1.22} |
30 {3.1} |
30 {3.1} |
