technical data Coupling Selection and Procedure
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Nylon chain coupling selection
1. Conditions of use required for selection
- (1) Daily operating hours
- (2) Load characteristics and type of prime mover
- (3) Transmitted power or torque and rotational speed
- (4) Outer diameter of connecting shaft
2. Selection method
- (1) Depending on the conditions of use, calculate Service factor from the Service factor table on the right.
- (2) Multiply the transmission power kW (or torque) by Service factor to obtain design kW (or corrected torque).
- (3) Select a coupling from kW ratings table that satisfies the corrected transmission power (or corrected torque) at the rotational speed to be used (see the table below).
- (4) If the required shaft diameter exceeds the maximum shaft diameter of the selected coupling, use a coupling one size larger.
- (5) When using a standard key at low speeds, the surface pressure may be excessive. Therefore, calculate the surface pressure of the key and consider whether a special key or spline is necessary.
- (6) When selecting a coupling for direct motor connection, refer to the table below.
Please refer to the selection table for direct motor connection.
| Load Nature | Type of engine | ||||
|---|---|---|---|---|---|
| electric motor turbine |
steam engine gasoline engine (4 or more cylinders) |
diesel engine gas engine |
|||
| Small fluctuation, small shock, small starting torque, no reverse rotation | 1.0 | 1.5 | 2.0 | ||
| Moderate fluctuation, moderate shock, no reversal (Most common case) |
1.5 | 2.0 | 2.5 | ||
| Large fluctuations, large impacts, reverse rotation under load, starting under load | 2.0 | 2.5 | 3.0 | ||
- Note: The above Service factor table is a general guideline. Please determine the coefficient taking into consideration the usage conditions.
[Reference] Relationship between torque, transmitted power and rotational speed
T = 9550 × P n T = 974 × P n
- T: Torque N・m
- P: Transmission power kW
- n: rotation speed r/min
| Motor output kW | Motor shaft diameter |
Model number | ||
|---|---|---|---|---|
| 2P | 4P | 6P | Standard type | |
| 0.2 | 0.2 | - | 11 | CN310 |
| 0.4 | 0.4 | - | 14 | CN311 |
| 0.75 | 0.75 | 0.4 | 19 | CN315 |
| 1.5/2.2 | 1.5 | 0.75 | 24 | CN317 |
| - | 2.2 | 1.5 | 28 | CN415 |
| 3.7 | 3.7 | 2.2 | 28 | CN415 |
| 5.5/7.5 | 5.5 | 3.7 | 38 | CN419 |
| - | 7.5 | 5.5 | 38 | * CN614 |
| 11/15 | 11 | 7.5 | 42 | * CN615 |
| - | 15 | 11 | 42 | * CN616 |
- Notes: 1. The motors are new standard Fully sealed and fan-cooling type of Class E, Class B, and Class F.
- Note) 2. *Not compatible with 2P motors.
- Note) 3. This is a selection table for general loads (Service factor 1 to 1.5).
