Worm gear with input flange
Description
VP worm gear units have a factory-mounted flange at the drive shaft. (In almost all cases, this is a small flange of size B14.) The drive shaft of VP worm gear units is always a pipe shaft into which the shaft of the electric motor is connected. The shaft size, flange type and housing size of the electric motor must match the driveway shaft size, flange size and housing size.
The following table shows the standard worm gear housing size in the Size 1 field. This means the box shape in which the gear ratios are located. The Size 2 field shows the worm gear ratio. This shows the extent to which the speed of rotation of the drive shaft is modified by the actuator on the output shaft. In the Size3 field, the shaft height of the electric motor that can be connected to the worm gear and the size of the switchable flange are indicated. If the shaft height of the electric motor and the flange match the driveway driveway height and gear flange size and the shaft diameter are correct, then that electric motor and that gear unit can be physically connected. The characteristics field also shows the maximum permitted power of engines compatible with worm gear and the diameter of the drive shaft. Never use worm gears with motors more powerful than allowed, as this will lead to premature wear and misuse! If you need more engine power than is allowed in the engine description, use a gearbox with a larger housing size.
What is gear ratio for worm gears?
The ratio by which the gearbox changes the speed of rotation of the drive-in electric motor is called the gear ratio. In the case of worm gears, we are always talking about deceleration ratios, i.e. the driven speed will always be less than the drive speed. Example: i=10 (or 1:10) means that worm gear reduces the number of revolutions of the electric motor by one-tenth. i=100 (or 1:100) means that the worm gear reduces the speed of the drive-in electric motor by one hundredth... The ratios are listed in the Size2 column of the table below.
What power can I connect an electric motor to my worm gear?
The maximum permissible power of the drive-in motor is always specified by the worm gear manufacturer. Example: P=0.55kW in the worm gear description means that worm gear must not be used with an electric motor with a power greater than 0.55kW. If more than one P value is indicated in the description, the manufacturer has given different values for the load on the gearbox as a function of speed. Example: P2p = 1.4kW means that when using a two-pole electric motor (approx. 3000 rpm), the maximum permitted power can be 1.4kW. P4p = 0.93kW means that when using a four-pole electric motor (approx. 1500 rpm), the maximum authorised power can be 0.93kW. P6p = 0.71kW means that when using a six-pole electric motor (approx. 1000 revolutions), the maximum permitted power can be 0.71kW. Never use a motor with more power than allowed for worm gear, as this will lead to a certain breakdown!