... stable transmission 4)NSK bearings RV series worm gear speed reducers:Model size:025,030,040,050,063,075, ... :5,7.5,10,15,20,25,30,40,50,60,80,100High quality synthetic lubricant oilMain adavantages:1 ... reliability,small valume,ominibearing installtion4.high ouput torque,large speed ratio range5.easy to combain with other products,such ... apperance,can work in hostile environment worm gear speed reducers