Maximum Performance

Maximum performance in continuous use.

Higher frequency, constant speeds, higher performance. The superior tool concept of FEIN high-frequency power tools makes them particularly well suited to use in metalwork, for heavy-duty grinding and continuous use when roughing-down or cutting under the toughest working conditions.

  • Thanks to design-related measures like induction motors and the fact that wearing power-transmitting parts are not used, FEIN high-frequency power tools satisfy very high robustness andservice life requirements.
  • They have power reserves, on average a good 100 % higher than normal.
  • In everyday use, this translates into constant speed across the entire load range. For efficient working with a high grinding performance and lower levels of disc wear.
  • The FEIN high-frequency range includes a wide selection of angle grinders and straight grinders for tradespeople and professional users in industry.
    FEIN high-frequency power tools can also be used as portable devices on the construction site or on stationary grinding stations.

  Comparison of characteristic curves depending on the power of different tool types

High-frequency cost-effective working.

In terms of investment, energy and maintenance costs, high-frequency power tools are much more cost-effective than comparable standard-frequency or pneumatic tools. The sample calculations below show a comparison of the systems.

High frequency compared with standard frequency.

A higher frequency means a higher speed which increases the motor’s output power. Increasing the frequency from 50 Hz to 300 Hz therefore increasing power sixfold while retaining the same size and weight. The optimum power/weight ratio is reached at 300 Hz. Outstanding speed stability over the entire load range ensures optimum peripheral speeds which impacts positively on grinding performance, productivity and an appreciable reduction in grinding disc wear.
The induction motors of the high-frequency power tools with squirrel cage rotors feature no wearing power-transmitting parts. They don’t need powerful ventilation, just surface ventilation, which allows them to be fully encapsulated and gives the motors complete dust protection. High-frequency tools have simple structures, making them easy, fast and cheap to maintain. Stationary frequency converters require virtually no service – with the exception of ball bearing maintenance (roughly every 20,000 operating hours).

High frequency compared with standard frequency.

High frequency compared with pneumatic system.

The power distribution system for high-frequency power tools has virtually no energy losses, while with pneumatic systems the heat produced when compressing air results in greater energy losses. In reality, an additional 10 to 20 % more energy is needed due to leaks – if the systems are poorly maintained, this figure may even rise to 30% and above. The performance of the pneumatic motors also depends on the condition of their components, which are subject to wear (for example, cylinder, rotor, thrust washers, flaps). This translates into continuous performance losses which in turn results in falling efficiency and rising energy consumption. Highfrequency power tools on the other hand continue to perform with full power after many hours of work: the performance of the robust induction motors remains constant at all times – regardless of wear.

High frequency compared with pneumatic system.