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The Worm Gear Advantage

Electrolift.com

Worm gears have an inherent design advantage over other gear sets; the worm can easily turn the gear, but the gear cannot turn the worm.  In lifting applications, this feature acts as a secondary brake due to limited back drivability.

The hoist motor can transmit motion through the gear reducer, but the load cannot transmit motion back through the gear reducer.

  • Regulates the lowering speed of the load
  • The load will not be allowed to free fall
  • OSHA [1910.179] recognizes this as an approved means of controlled braking

In an industry where ‘load brakes’ and ‘regenerative braking’ are widely accepted, Electrolift offers the better option by using a worm drive gearbox as the secondary braking function.

The main advantages of Electrolift’s non-load brake worm drive gear reducer:

  • Constant load on the load block.  Load brake hoists are prohibited from doing this because it does not allow the load brake to release causing overheating and premature failure.
  • Long lifts - Long lifts cause load brakes to overheat and prematurely fail
  • Faster lifting speeds – Load brakes accumulate excessive heat as lifting speeds increase.
  • Inherently safe – Worm drives do not need controls or high maintenance mechanisms to ensure safe lifts.
  • Low Maintenance – Less moving parts than gearboxes that require complex load brake mechanisms