What is a Planetary Gear Set?

The central sun gear while on the carrier that rotates meshes with the orbiting planet gears. It works same as the miniature solar system. Yet, their dispensation may offer rapidity diminution, torque multiplication, or reverse rotation with effectiveness in a small format.

Depending on the design and level of friction, planetary gears may be backdrivable. Other high-torque systems do not back-drive to avoid reverse motion. Nevertheless, the design of gears tooth and lubrication are selected by engineers to operate backdrivability safely and efficiently.

Planetary gear sets are hardly ever used in traditional manual transmissions. They use parallel gear pairs of shafts with synchronized shifting. Nevertheless, more advanced manual systems might use planetary gears to allow compactness or multi-speed systems.

The majority of semi-autonomous transmissions operate planetary gear sets. Leveraging these allows the easy change of gears without a clutch pedal. These systems are however able to operate at higher torque and offer numerous gear ratios within a small package.

Calculations of the gear ratios are done by dividing the count of teeth on the sun, planet and the ring gears. This final ratio depends on the input, output and fixed components. Yet, very accurate calculations have to consider meshing conditions and the distribution of torque.

CNCSwissMasion is based on the ISO 9001:2015 and IATF 16949 quality management systems. These certifications ensure that there is tight regulation of design, production and delivery processes. The IATF 16949 conformance guarantees automotive-level consistency, traceability, and risk-aversion. Consistency in audits, documented processes, and corrective measures promote the manufacture of stable planetary gears to global industries.

The plant has modern CNC lathes and CNC machining centers. Gear cutting machines allow cutting of external and internal gears in a precise manner. Surface and cylindrical finishing at high accuracy are assisted by grinding machines. Complex planetary gear structures are finished using broaching, slotting, and polishing machines.

CNCSwissMasion has a total system of quality control that includes all production phases. The process begins with the inspection of the raw material and continues with machining and final assembly. Operators adhere to a set of inspection plans with established check points. In mass production, statistical process control is used to maintain uniformity and to forego deviation.

Tooth profile and tooth direction are measured using gear measuring centers and dimensional accuracy and concentricity is checked using coordinate measuring machines. Hardness during heat treatment is tested by Rockwell and Vickers procedures. The stability of operations and performance are checked by rolling, noise and vibration tests.

CNCSwissMasion will help in designing everything in planetary gears manufacturing, based on customer drawings. The designs are evaluated by engineers with the aim of maximizing the manufacturability and performance. Approval normally takes 15-25 days to the production of samples. The lead times can be changed depending on the complexity of the material and design.

The plant is capable of producing planetary gears to a DIN Grade 5 level of accuracy. Close tolerances to ±0.004 mm are achieved by controlled grinding. Accuracy is up to automotive, robotics, and medical industry standards. The batches contain reports on the inspection that verify the standards of accuracy achieved.

The simplest planetary system consists of three gears: sun, planet, and ring. Now you know facts on What is a planetary gear set. Complex systems can add sets of gears to obtain increased gear counts. Nonetheless, designers select settings to create the most efficient and maximum torque in every application.