Heavy Duty Worm

Chain & Drives supply the ER Series Heavy Duty Worm Gear unit.

General Purpose usage to Double Reduction gears, Geared Motors, Cooling Tower gears & Stirrer units.

The ER Series of worm gear units are direct replacements for the David Brown (Radicon) Series A heavy duty worm gear units. All critical dimensions and product quality is the same and the ER heavy duty worm gear range is available in the following types:

  • Underdriven ER – U
  • Overdriven ER – O
  • Vertical ER – V



4″ to 17″


1.1 to 350 kW

Mounting & change of Shaft Handling

Achieved easily and quickly without dismantling the gear case.


Heavy duty stirrer gear units Cooling Tower gear units Double Reduction: Worm-worm, Helical-worm, Worm Geared motors.


Worm Gearbox

PDF, 2.60MB

Contact us about Heavy Duty Worm Gearboxes

Please contact us using the form below or send us an email.