Description:
It is a spacer for precisely matching the hub hole dedicated to the APC propeller and the engine shaft.
The APC propeller is high pressure injection molded. Since the entrance of the resin is in the center of the hub, a hole is drilled in the center of the hub after molding. Although holes are drilled to fit the shaft diameter of most engines, depending on the size, there may be holes larger than the shaft diameter of the engine. In such a case, by inserting this propeller spacer it is possible to accurately match the diameter of the engine shaft and the diameter of the hub hole.
We prepared three types of shaft hole diameters to match the shaft diameter of most engines. (M5, UNF 1/4, UNF 5/16)
Propeller hub hole diameter has several sizes. Please use the propeller spacer matching the propeller and engine shaft diameter with reference to the following dimensional drawing. Please correct the size of the propeller spacer if necessary.