Acoustic waves, indeed, are generated by most planetary gearboxes having straight teeth because the "contact ratio" of the internal gears (number of teeth in contact) is generally below 2.0 in spur gear stages, and 2.0 is the limit after which a gear stage becomes quiet because 2 teeth are always in contact.
Thanks to the helix angle allowing more teeth to be contact at the same time, the contact ratio is generally higher than 2 in helical gearboxes, so they can be more silent.
On the other hand, helical gears generate high axial efforts to the internal components of the gearbox such as bearings or friction disks, so such construction can be prejudicial to a planetary gearbox life if some rules are not respected. The more helix angle, the more efforts on the bearings!
Thanks to the PerfectPitchTM concept, Reckon low-backlash planetary gearboxes are quiet, reliable and calculated for a long lifetime in tough working conditions.
Find Reckon products in the 13th International Machine Tools located in the Exhibition Chennai Trade Centre, Chennai, Indiafrom 21st to 25th June 2018
In addition to the Ultimate range, Spirit is dedicated to weakly dynamic applications. This gearbox offers a rotating flange output that will save you space. Its price is very competitive thanks to the use of a straight toothing.
Access was developped to offer the lowest price on the market of low-backlash planetary gearboxes. Yet it features carburized and ground planets, 5 arc-min backlash, monobloc housing, NTN bearings and probably the best lubricant on the planet : our usual Sumico gear grease!