TEL: +8613735628928
Categories
Contact Us

Add: Jinsong Building, Headquater Center Yongkang City, Zhejiang Province, China

Mob: +8613735628928

E-mail: rabby@cnmaster-tools.com

Rabby Tang: +8613735628928

News
Home > News > Content
History Of Power Tools
Jul 27, 2018

1895, German overtone made the world's first DC electric drill. The shell is made of cast iron and can drill 4mm holes in the steel plate. A three-phase power-frequency (50Hz) electric drill followed, but the motor speed failed to break through the 3000r/min. 1914, the emergence of single-phase series of motor-driven electric tools, motor speed up to 10000r/min above. 1927, the emergence of a power supply frequency 150~200hz medium frequency electric tool, which has the advantages of high speed of Single-Phase series Motors, but also has three-phase power-frequency motor structure simple, reliable advantages, but the need for medium-frequency current supply, use is limited.

  • Contact Us

    Add: Jinsong Building, Headquater Center Yongkang City, Zhejiang Province, China

    Mob: +8613735628928

    E-mail: rabby@cnmaster-tools.com

    Rabby Tang: +8613735628928

  • Categories
  • Copyright © Yongkang Master Hardware & Industrial Tools Co.,Ltd All Rights Reserved.