UMI universal worm gearboxes

Every unit carries a jaw coupling on the motor side. It works as overload protection, limiting the damage a sudden rise in load can do to the gear set and the rest of the drive. That makes UMI a sensible choice where the driven mechanism can snatch or jam. It does not replace correct sizing: motor power and the duty classification still have to match the application.

Housings are mainly die-cast aluminium, which keeps the weight down and stands up to corrosion. The worm wheel is bronze and the worm is alloy steel, so the two run together quietly and wear in a predictable way. Accessories cover FA, FB and FC flanges, torque arms, and single or double ended output shafts, which lets the gearbox be tied into the machine in the way the geometry allows.

Sizing starts with the required torque, the output speed and the character of the work. Frequent starts and changing loads decide the size as much as the steady load does. Tell us the mounting orientation as well, because it sets the lubrication and the cooling and has to be fixed before the unit is built. Choose the flange, FA, FB or FC, to match the machine, and add a torque arm where reaction forces are carried.

Temperature, humidity and dust change the build and the sealing we specify, so describe where the gearbox will work. UMI units suit belt conveyors, feeders, gate drives and packing equipment, and they are common in automation and light industry. They take S1 continuous duty when sized to the recommended load, and non-standard shafts, mounting holes and special seals are possible in selected cases. Send the duty and the mounting position and we will quote within one working day.