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A toothed clutch is a device that connects two kinematic systems rotating at the same or a slightly different speed, depending on the type of toothing. It can have the following types of toothing:

  • Triangular without backlash, for connecting at a standstill or at null/almost null relative velocity, with two-way drive.
  • Trapezoidal with backlash, for connecting at a standstill or at very low relative velocity, with two-way drive.
  • Saw toothing, for connecting during movement at medium to low relative velocity, with one-way drive.

Standard toothed clutches allow connection in any position, while other toothed clutches can be provided for connecting a single point or several fixed points (phase).

They can be controlled in the following ways:

  • Hydraulic
  • Pneumatic
  • Electromagnetic

They can operate in the following ways:

  • POSITIVE: the control connects the transmission.
  • NEGATIVE: (with springs pressure) normally closed: the control disconnects the transmission.