Technical Data Coupling Sizing and procedure
To view selection procedures and precautions, please proceed to the following.
Click here to narrow down the product series or to make a tentative selection.
If you have specific conditions of use and wish to make a detailed selection, please click here.
ECHT-FLEX Coupling NES Series Selection
1.Correction torque calculation
1-1.
| Load type | Uniform load | Moderately variable load | Highly variable load |
|---|---|---|---|
| Service factor (SF) | 1.2 | 1.4 | 1.5 |
1-2. When connected to general-purpose motor
T = 9550 × P n
- T' = T × SF
- T = Load torque N・m
- P = Power transmission kW
- n = Speed r/min
- T' = Correction torque N・m
| Load type | Motor type | ||||
|---|---|---|---|---|---|
| General purpose motor, gas turbine | Engine | ||||
| Small moment of inertia | Large moment of inertia | Four cylinders | Six cylinders | Eight cylinders | |
| Uniform load | 1.5～1.75 | 1.75～2.0 | 2.5～4.0 | 2.0～2.5 | 1.5～2.0 |
| Moderately variable load | 2.0～2.5 | 2.5～3.0 | 4.0～5.0 | 2.5～3.5 | 2.0～3.0 |
| Highly variable load | 3.0～4.5 | 4.5～6.0 | 4.5～5.5 | 3.0～4.0 | 2.5～3.5 |
- ※If shock loads will be applied, calculate the correction torque by multiplying the motor’s maximum output torque by a shock factor of 1 to 2.5.
- * Prevent startup torque or other torque being applied even instantaneously if it will exceed the bore’s friction transmission torque (see each product pages).
2.Shaft diameter
Check that the shafts to be mounted are within the coupling’s range of mountable shaft diameters.
With the clamp type, make sure that the correction torque determined in Item (1) does not exceed the allowable transmission torque for the clamp.
Strength must be checked when mounting the product on a hollow shaft. Inquire for information.
3.Cautions for servomotor drive
Depending on the natural frequency and electric control status of the system as a whole, a ball screw drive system using a servomotor may generate large vibration or abnormal sound caused by oscillation due to the characteristics of the servomotor.
In this case, adjust the torsional stiffness and moment of inertia of the overall drive system to increase the torsional natural frequency, or adjust the servo gain with the electric control tuning function of the servomotor.
4.Show model No.s
ECHT-FLEX Couplings satisfying Items 1 to 3 above should be chosen from the transmission capacity table.
