Planetary Reduction Gearboxes

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Planetary Reduction Gearboxes


Sri Techno Engineering Company offers a range of Planetary Reduction Gearboxes from Italy. Advantages of Reggiana planetary gearbox: high reduction ratios in small size (compact); high torque transmission in small size; high radial loads on output shaft; changing of ratio in same gearbox; and 100% European product with European gear steel; stock available in India. Design and working principle: sun pinion; three or more satellites; internal ring gear; satellite mounting pin; and satellite carrier. The sun pinion transmits it's motion to the satellites. The satellites then turn inside the ring gear, which is static. As consequence the satellite carrier rotates. The motion of the carrier is transmitted to an output shaft or to another reduction group. High reduction ratios: given the same number of teeth Z1 and Z2 the planetary gear offers a higher ratio than the parallel shaft gear. The reduction obtained is determined by the relation between the number of teeth on the sun pinion (Z1) and the number of teeth on the ring gear (Z2). High torque transmission: in a planetary gear the number of teeth in contact is higher than in a spur gear, therefore the planetary gear has a superior relation between torque handling capacity and dimensions. High radial loads on the shafts: in the planetary gear the internal forces are balanced, i.e., the resulting force is zero. The input and output shafts, therefore are only transmitting torque. In a parallel shaft gear the internal forces are not balanced and the shaft must therefore support the internal loads. In planetary gear internal forces are balanced it is therefore possible to have higher external radial loads on the shaft.
Additional advantages:

  • Low noise level – smaller dimensions of teeth give lower peripheral velocity on the pitch diameter
  • High efficiency
  • Low oil consumption and zero oil leakage
  • Genuine in-line gearbox – axis of transmission (input and output) is same
  • Flexible ratio – from 3:1 to infinite
  • Stock available in Indian rupees
  • Stock available from SEZ unit for EOU/SEZ/EPCG/advance license customer.