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An Internal Gear could be described as the contrary of an external equipment in that one’s teeth point towards instead of away from the guts, and addendum and dedendum take reverse positions. Internal Gears give a compact parallel shaft tranny drive with large rate reduction. Used with a typical spur pinion the ratio is equivalent to that of two exterior gears, however the center distance is much smaller. In cases where it is necessary to possess two parallel shafts rotate in the same path, the inner gear eliminates the usage of an idler gear.

Internal Gears possess a number of advantages when properly used. One such benefit is reduced sliding actions. The corresponding working areas of one’s teeth of an internal gear and pinion are more nearly of the same duration than may be the case with an external gear and pinion getting the same tooth ratio and tooth length. Which means relative slippage of the teeth is less regarding the internal. This point presents among the benefits of using Internal Gears. The sliding actions of one tooth over another causes friction; and since friction results in tooth use, a reduction in the amount of sliding action is desirable.

Internal Gear drives may be operated with the gear in a set position and the pinion rotating along the pitch line, or the apparatus may be free to rotate with the pinion rotating in a fixed position.

When mating pinions are too close in proportions to the apparatus, interference may result. Therefore, the difference in teeth of the pinion to the apparatus planetary gearbox should not be significantly less than 15.

RUSH GEARS inc. offers standard Internal Gears in STEEL, STAINLESS, CAST IRON, BRONZE, Light weight aluminum, DELRIN and nonmetallic (PHENOLIC). We will gladly produce made to purchase Internal Gears to meet your needs.