Reduction Gearboxes
Worm Gearboxes
Worm gearboxes are used for transmitting mechanical power at right angles to the electric motor or input drive.
Worm gearboxes are less efficient than the equivalent helical bevel gearbox, however they can offer high to very high gear ratios in a small space. Used in screw jack systems as the primary drive or on motorised screw jacks. Normally used as the main drive for H, U or T configuration jacking systems. Also used on I-configurations though usually mounted to the first screw jack in the line. Worm gearboxes can be mounted to screw jacks via an adaptor where a high reduction is required for slow moving applications.
Up to 71000Nm torque transmission with gear ratios up to 10000:1.
Useful Information
Gearbox Features
Torque Range
– 13 Nm to 71000 Nm
Power Rating
– 0.04 kW to 75 kW (at 1400 rpm input)
Gear Ratios
– 7.1:1 to 10000:1
Output
– Keyed hollow shaft
– Plug-in solid output shaft
– Torque limiter as an option
– Metric or inch series solid output shaft
Input
– IEC motor adaptors
– Solid input shaft
Gearbox Options
AC Motors
– Integral motors and brake motors
– IEC motors and brake motors
– Single and dual speed motors
Main brake features
– DC and AC supply
– Fast brake engage/disengage through electronically controlled AC/DC rectifiers.
Main motor options
– Thermistors and thermostat sensors
– Separate supply forced ventilation
– Line driver and push-pull incremental encoder
Selecting the Right Reduction Gearbox
There are 3 factors to consider when selecting the correct reduction gearbox.
- Select a gearbox type to the closest required power (Pd)
- Find the closest matching output speed hence gear ratio for that gearbox type
- Check that the gearbox power rating is suitable for the actual output speed
Download the Reduction Gearbox selection guide for more information.
