Gatemaster openers from Aldon are compact, simple-to-use manual tools for hard-to-open gates. Through planetary gear reduction in the Gatemaster head, the worker’s handle effort is multiplied 18-1/2 times for the tool.
A maximum torque output of 3,200 ft-lb (enough to open almost all gates, Aldon says) can be achieved by only 173 lb of handle effort.
By comparison, the same effort on a 6 ft pry bar would only produce about 1,000 ft-lb of torque. The Gatemaster II model includes a torquing unit which further reduces the input effort to only 35 lb.
There is no loss of effort when using the 35 lb units. The output torque is sustained until the gate opens or the operator releases the torque.
A controlled-shear output square drive protects internal components in the event of maximum output capacity is exceeded. This overload-protection feature causes the drive to fracture when output exceeds 3 to 10 percent of rated output capacity.