Existing products

Component Set HDUA

Compact differential gears

The flat gear in the HDUA series is a differential gear of compact and simple construction. It is able to implement high gear ratios over a very short axial construction length. Its coaxial input and output make it ideal as a differential gear for phase adjusters and speed controllers. It is available both as a component set and as a unit with an integrated bearing. 

Maximum input speed
nin (max)

1750 - 3500

Repeated peak torque

29 - 3720


78 - 320

Number of sizes


Predestined for phase adjustments

The short axial length of the flat gears in the HDUA enable maximum gear reduction in a very small construction space. Flat gears are ideal in dynamic servo systems and also as differential units for phase adjusters and speed controllers. Their ease of installation and maintenance free operation are further reasons for using this gear type in all fields of modern mechanical engineering. The compact flat gears in the HDUA series are of the highest precision and are ideal for use both in machine engineering and in complex servo systems. The series is available both as a component set and as a unit with an integrated drive shaft bearing. In the HDUA series of flat gears, an extra element is applied to the functional principle of the Harmonic Drive® strain wave gear. The dynamic spline (DS) is a hollow wheel with internal teeth - the same number of teeth as the flexspline. This component rotates in the same direction and at the same rotational speed as the flexspline and is used as an output element in speed reduction configurations. The dynamic spline differs from the circular spline by the chamfer in the external circumference.


  • Packaging machines
  • Printing machines
  • Motor and Control Equipment


  • Packaging printing presses
  • Flexo printing machines
  • Offset printing machines
  • Stator winding machines



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