For applications requiring continuous duty cycles (at rated capacities only), Duff-Norton offers their 7500 Series actuators. During continuous cycles, the 7500 Series keeps performing with efficiency ratings up to 70 percent, maximum horsepower ratings up to 10 and capacities of 3,500, 12,000 and 27,000 lbs. All models are available with Top Plate, Clevis or Threaded End mounts. The 7500 Series actuators can be used individually, in tandem or as part of a larger mechanical system. All Duff-Norton mechanical actuators come with a limited lifetime warranty.