Are these all the engine variants that HILBA can offer?2021-02-17T09:01:39+01:00

The listed variants are configurations selected by us with brushed and brushless DC motors. This selection should help you to find a suitable drive without previous knowledge and with as little effort as possible.

For many applications, however, no suitable combination can be found in this list. For example, would you like to use a three-phase motor, or have already selected a motor yourself? In this case, we offer you the option of attaching any engine from any manufacturer to one of our gearunits. Please contact our sales department to discuss your individual requirements.

Our gear motor portfolio:

Worm gear motor
Planetary drive motors
Screw Jack

Gears for motor mounting:

Worm Gears
Planetary Gear
Spur Gears
What is a nominal torque and what is the maximum?2020-10-21T14:10:46+02:00

Let’s start with the word “nominal”. Values with the designation nominal… correspond to the maximum value permitted for continuous operation (S1).

The nominal torque is therefore the maximum permissible continuous torque that may act on the output shaft of the actuator. The nominal torque is determined by the continuous power of the electric motor, or by the continuous load of the attached gear unit.

There are now combinations of motors and gears where the maximum load of the gear is not yet reached with the nominal power of the electric motor. If the motor is now operated cyclically rather than continuously, a higher torque can also be achieved. In any case, the maximum load of the gear unit must not be exceeded. For this purpose it is often necessary to limit the motor current so that excessive torque does not lead to damage to the drive. The limit values can be taken from the data sheet of the respective gear motor or contact our sales department.

DC motor or better an EC motor?2020-10-21T14:05:51+02:00

Whether to use a brushless DC motor (EC or also BLDC) or a brushed DC motor is mainly a technological and cost-related decision.

If the control should be uncomplicatedand the priceas lowas possible, you should choose a DC motor. The control mechanism is very simple: At a minimum, a voltage must be applied to two connections to operate the motor. Furthermore, a DC motor is usually cheaper than a comparable EC motor.

EC motors are usually more powerful and their lifespanis significantly longer due to fewer wearing parts. EC motors are quieterand due to the missing brushes, they do not produce graphite dust and brush fire. This makes an EC motor better suited for delicate environments. The activationis much more complex compared to a DC motor. Additional control electronics are required and eight wires have to be connected.

If the technological advantages of an EC motor are to be used with the simple control of the DC motor, we also offer brushless motors with integrated electronics. If you are interested in this, please contact our sales team.

What is understood by the concept of self-locking gears?2021-02-17T08:47:05+01:00

Self-lockingonly occurs with worm gears. In a self-locking gear unit, the output shaft cannot be moved by a torque applied to this shaft. It behaves like a brake. A vivid example of a self-locking gear is a wiper motor for windscreens. When the motor is switched off, the wiper stops in place and cannot be moved in any direction.

A worm gear becomes self-locking when its degree of efficiency becomes less than 0.5. In such cases, we speak of static self-locking if the drive exhibits this behavior when idle. This static self-locking effect is indicated in the list of gears on our website. The friction coefficient at the point of contact can be affected through regular operation or occurring vibrations and the degree of efficiency can be improved. If a drive is self-locking even in this state, this is called dynamic self-locking.

Planetary gears that have a very high reduction ratio exhibit a similar behavior. Their output shaft cannot be moved seemingly. However, this is due to the high frictional torque in the gearbox. If the torque is increased, any planetary gear can be operated in reverse. Self-locking worm gears however cannot be operated in reverse, regardless of the force applied.


Our self-locking portfolio:

Worm Gears
Worm gear motor
Planetary gears, worm gears. What is the difference?2021-02-17T09:09:13+01:00

Planetary and worm gears differ fundamentally in the way they function.

With worm gears, the contact surfaces of the gear teeth glide on each other like a ski on snow. This makes the worm gear a very quiet option during operation. At the same time, the surfaces are subject to wear due to friction and part of the energy is converted into heat, resulting in a lower level of efficiency. Therefore, a material with good emergency running properties such as bronze is used. The axesof the gear wheels are always arranged at a right angle to each other and offset. Therefore the motor is always positioned at 90° to the output axis and is offset in height by the center distance. Worm gears can be manufactured with only one (1) tooth. Therefore high reduction ratios can be realized in one gear stage. This makes the worm gear unit simpleand compactindesign. Worm gears are also available with a hollow shaft or double-sided shaft.

The contact surfaces of planetary gears on the other hand roll against each other like a car wheel on the road. Wear is therefore minimal and their efficiency is high. However, more noise is generated during tooth engagement, making the planetary gear loudercompared to the worm gear. Steel can be used as a suitable material, which allows for high loadcapacities. The axisof the motor and the gear are coaxial, which means the planetary gear acts as an extension of the motor axis. Planetary gears can have high reduction ratios. To realize this, several gear wheels (gear stages) have to be installed. This leads to the fact that the gear unit becomes more complex in its structure as the reduction ratio increases. This also increases the costs the higher the reduction ratio becomes.


Our gear portfolio:

Worm Gears
Planetary Gear
How does the engine mounting process look like in practice?2021-02-17T08:46:40+01:00

HILBA Antriebstechnik AG develops and produces gears up to 150 Nm for industrial applications. Our gearboxes are designed in such a way that we can fit motors of all types and manufacturers. And that works as follows:

  • You already have selected a motor or even have one at hand. Or you know exactly what the particular motor has to be able to perform and we can recommend a suitable make for your purposes.
  • You decide whether you want to deliver the engine to us or whether we may procurethe engine for you. Both is possible.
  • As soon as we have the engine in our hands, we prepareit for mounting. To do this, we shorten engine shafts, build toothed gear components or even sensors onto the engines. This work step requires a lot of know-how and usually cannot be carried out at the customers facilities.
  • • As soon as the gears are assembled, we carry out a function test on 100% of the drives. For this purpose we have suitable control units for all common motor types in stock.

If you do not want to worry about selecting a suitable motor yourself, we can offer you a large number of pre-configured geared motors.

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