The patented model EC20 Clutch Brake Long-Life (EC20CBLL) design provides stopping
and holding torque in addition to clutching. Reell's clutches are designed for
easy mechanical and electrical assembly and for low power consumption. It is
ideally suited to paper transfer applications.
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Design Characteristics
Technology |
Electromechanical wrap spring clutch |
Low Wattage |
The EC20CBLL requires 14 watts at 24 volts for engagement. This voltage
is held for 50 msec. The hold voltage of 12 volts uses only 3.5 watts of
power. |
High Torque, Small Package Size |
The EC20CBLL provides 2.26 N-m (20 lb-in) of total load over a life of
1 million actuations with an outside diameter of about 33mm (1.75 inches),
and a shaft length of about 25.4mm (1 inch). |
Rapid Acceleration |
After spring wrap-down, the EC20CBLL will accelerate loads from zero to
full speed in less than 3 milliseconds. |
Consistent Performance |
Engagement is made with virtually no slippage and disengagement is almost
instantaneous. |
Power Source |
All Reell clutches operate on either filtered or unfiltered dc power.
The EC20CBLL requires a pick voltage of 24V and a hold voltage of 12V. The
use of filtered power is recommended for better life at high speed. |
Application Considerations
Single Direction |
Wrap spring clutches provide torque only in the direction
in which they wrap down. This allows for overrunning. |
Relative High Shock |
Due to the EC20CBLL's rapid acceleration, system inertia effects can be
significant. In some applications an in-line slip device may be used for
shock absorption. Please contact a Reell Sales Representative for more information
regarding this option. |
Engagement Relative to Speed |
The EC20CBLL relies on relative motion between the input and output for
engagement. Thus, the slower the speed, the longer the time until engagement. |
Operating Parameters |
EC20CBLL performance is best within the following conditions:
- 0°- 40° C (32°-104° F)
- 100-800 rpm typical, 1400 rpm max.
- Minimum load friction torque 0.05 N-m (6.0 oz-in) plus customer input bearing torque.
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Available Options:
Direction: CW, CCW
Bore: 1/4 inch, 5/16 inch, 6mm, 8mm
Shaft: Cross Pin Only
Voltage: 24 VDC pick / 12 VDC hold
Electrical Connection: Molded Connector
Applications
- Paper Feed Systems
- Copiers/Printers
- Finishing Equipment
- Collators/Sorters
- Mailing Equipment
- Ticket and Receipt Dispensers
- Revolving Media Displays
- Packaging Equipment