An Internal Gear could be described as the opposite of an external equipment in that the teeth point towards rather than away from the guts, and addendum and dedendum consider reverse positions. Internal Gears give a compact parallel shaft tranny drive with large quickness reduction. Used with a typical spur pinion the ratio is the same as that of two external gears, but the center distance is much smaller. Where it’s important to possess two parallel shafts rotate in the same direction, the internal gear eliminates the use of an idler gear.

Internal Gears possess several advantages when properly applied. One such benefit is reduced sliding actions. The corresponding working surfaces of one’s teeth of an internal equipment and pinion are more almost of the same length than is the case with an external gear and pinion having the same tooth ratio and tooth size. Which means relative slippage of one’s teeth is less regarding the internal. This point presents one of the benefits of using Internal Gears. The sliding action of one tooth over another planetary gearbox causes friction; and because friction results in tooth wear, a reduction in the amount of sliding action is certainly desirable.

Internal Gear drives could 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 set position.

When mating pinions are too close in proportions to the gear, interference may result. As a result, the difference in teeth of the pinion to the gear should not be less than 15.

RUSH GEARS inc. provides standard Internal Gears in Metal, STAINLESS STEEL, CAST IRON, BRONZE, Aluminium, DELRIN and nonmetallic (PHENOLIC). We will gladly produce made to purchase Internal Gears to your requirements.