technical data Coupling Selection and Procedure
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Roller chain coupling selection
1. Conditions of use required for selection
- (1) Daily operating hours
- (2) Load characteristics and type of prime mover
- (3) Transmission power kW, rotational speed r/min, torque N・m
- (4) Shaft diameters of both shafts
2. Selection method
- (1) Depending on the conditions of use, calculate Service factor from the Service factor table on the right.
- (2) The transmitted power (or torque) is multiplied by Service factor to obtain the corrected transmitted power.
(or correction 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) If a standard key is used, 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 | ||
- Notes: 1. Additional charges based on the operating time of the chain coupling (when the speed is 50 r/min or more)
8 hours to 16 hours per day......0.5
16+ hours/day......1.0
- Note 2) The above Service factor table is a general guideline. Please determine the usage coefficient taking into consideration the conditions of use.
[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
3. Recommended model numbers for direct motor connection
| Motor Capacity kW |
Motor shaft diameter mm |
Model number |
|---|---|---|
| 0.1 0.2 | 11 | CR3812 |
| 0.4 | 14 | CR3812 |
| 0.75 | 19 | CR4012 |
| 1.5 | 24 | CR4014 |
| 2.2 3.7 | 28 | CR4014 |
Note) The motor is Fully sealed and fan-cooling type 4P motor.
| Motor Capacity kW |
Motor shaft diameter mm |
Model number |
|---|---|---|
| 5.5 7.5 | 38 | CR5016 |
| 11 15 | 42 | CR5018 |
| 22 | 48 | CR6018 |
| 30 | 55 | CR6018 |
| 37 45 | 60 | CR6022 |
4. Backlash amount
| Model number | CR3812 | CR4012 | CR4014 | CR4016 | CR5014 | CR5016 | CR5018 | CR6018 | CR6022 |
|---|---|---|---|---|---|---|---|---|---|
| Backlash amount (deg) |
2.04 | 2.12 | 1.80 | 1.58 | 1.72 | 1.50 | 1.32 | 1.24 | 1.02 |
| Model number | CR8018 | CR8022 | CR10020 | CR12018 | CR12022 | CR16018 | CR16022 | CR20018 | CR20022 |
|---|---|---|---|---|---|---|---|---|---|
| Backlash amount (deg) |
1.16 | 0.94 | 1.00 | 0.84 | 0.68 | 0.62 | 0.52 | 0.66 | 0.54 |
Note: The above values are calculated values and are not guaranteed. Please contact us for values for other model numbers.
5. Usable ambient temperature
-10℃～60℃
If you are using the product outside the above temperature range, please also consider heat-resistant specifications (-10°C to 150°C).
