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Compact worm gear drives for fixed and portable applications

03 May 2012

CP Automation is currently distributing Chiaravalli’s failsafe spring-applied motor gearboxes, which are suitable for heavy duty applications such as printing and paper converting, as well as applications like portable lifting equipment when coupled to a battery-operated dc motor.

Both ac and dc motors can be fitted, allowing OEMs and machine builders to expand into new markets where portable equipment may be required. With a 12V, 24V, 48V or 90V dc motor they can be used in portable battery-operated lifting devices up to five tonnes. Because worm gearing has such a high ratio it will not back-drive. However, because the motor’s brake is applied by a spring it is failsafe.

The CH version of the gearbox has a motor mounting flange that can separate from the housing incorporating the oil seal. This avoids the risk of damage to the oil seal when replacing the input flange. The worm screw has a ZI involute profile providing a gear ratio up to 1:300.

The CHM version of the gearbox has a square shape, making it considerably more versatile for mounting. Aluminium casings are available from sizes 025 to 090, while the sizes 110 and 130 are made from cast iron.

The units are available from stock within a week, with optional 24-hour despatch service.


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