Technical Data Coupling Sizing and procedure
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Roller chain coupling Selection
1. Operating conditions
- (1) Daily operating hours
- (2) Load characteristics and type of motor
- (3) Transmission power (kW) and rotation speed (r/min) or torque (N·m)
- (4) Outer diameters of both shafts
2. Selection Method
- (1) Obtain the service factor from the table of service factors on the right-hand side according to the operating conditions.
- (2) Multiply the transmission power (or torque) by the service factor and obtain the correction transmission power (or correction transmission torque).
- (3) Use the transmission capacity table to select a coupling that satisfies the correction transmission power (or correction torque) at the operating rotation speed. (See Table below. )
- (4) If the required shaft diameter exceeds the maximum shaft diameter of the coupling selected, adopt a coupling a size larger.
- (5) The contact pressure may become excessive if a standard key is used. Calculate the contact pressure of the key and consider the necessity of using a special key or spline.
- (6) If the coupling is directly connected to the motor, select the coupling from the following table of recommended models for direct motor connection.
| Load characteristics | Motor type | ||||
|---|---|---|---|---|---|
| Motor Turbine |
Steam engine Gasoline engine (4 cylinders or more ) |
Diesel engine Gas engine |
|||
| Low fluctuation, low impact, low starting torque, and no reverse rotation | 1.0 | 1.5 | 2.0 | ||
| Middle fluctuation, middle impact, and no reverse rotation (standard load ) |
1.5 | 2.0 | 2.5 | ||
| High fluctuation, high impact, reverse rotation, and loaded starting | 2.0 | 2.5 | 3.0 | ||
-
Note) 1. An increase according to the operating hour of the chain coupling (provided that the rotation speed is 50 r/min. or more )
8 to 16 hours/day ......0.5
16 hours or more/day ......1.0
- Note) 2. The above table shows rough service factor standards Decide on the service factor according to the operating conditions.
[Reference ]Relationship between torque, transmission, and rotation speed
T = 9550 × P n T = 974 × P n
- T：Torque N・m
- P：Power transmission kW
- n：Speed r/min
3. Recommended coupling models for direct motor connection
| Motor Capacity kW |
Motor shaft diameter mm |
Model No. |
|---|---|---|
| 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) Values shown apply to totally enclosed fan-cooled 4-pole motors.
| Motor Capacity kW |
Motor shaft diameter mm |
Model No. |
|---|---|---|
| 5.5 7.5 | 38 | CR5016 |
| 11 15 | 42 | CR5018 |
| 22 | 48 | CR6018 |
| 30 | 55 | CR6018 |
| 37 45 | 60 | CR6022 |
4. Backlash
| Model No. | CR3812 | CR4012 | CR4014 | CR4016 | CR5014 | CR5016 | CR5018 | CR6018 | CR6022 |
|---|---|---|---|---|---|---|---|---|---|
| Backlash (deg) |
2.04 | 2.12 | 1.80 | 1.58 | 1.72 | 1.50 | 1.32 | 1.24 | 1.02 |
| Model No. | CR8018 | CR8022 | CR10020 | CR12018 | CR12022 | CR16018 | CR16022 | CR20018 | CR20022 |
|---|---|---|---|---|---|---|---|---|---|
| Backlash (deg) |
1.16 | 0.94 | 1.00 | 0.84 | 0.68 | 0.62 | 0.52 | 0.66 | 0.54 |
Note) The above figures are calculated value and not guaranteed. Consult us for the backlash angles of other models.
5. Operating ambient temperature
-10℃～60℃
If the operating ambient temperature range is other than the above, also consider the heat resistant series (-10℃ to 150℃)
