This To connect the output shaft of an engine to a generator head input shaft or anything else for that matter, a special shaft coupler is required. Basically, three pieces are needed. Select a coupler half that is the correct size to fit the engine shaft or driving shaft size, then select a coupler half that is the correct size for the generator head or driven shaft size. Then the two shaft couplers are joined using what is called a spider. Notice that the shaft couplers each have 3 fingers and the spider has 6 slots. The three fingers from the engine side fit into three of the spider slots, and the three fingers from the generator side coupler fit into the other three slots on the spider. This coupler assembly allows for several degrees of misalignment between the two shafts and protect the bearings from seeing side loads that would result from misalignment. -202 It lasted far longer if I followed the simple rule given above. My wifes ipod lasts for days of 10-hours a day use between charges as opposed to another person she knows whose ipod lasts a just a couple hours before needing a charge again. I always insist on her charging new lithium-ion batteries as above. "home energy rating system booklet " and "first electricity in homes " (include "permanent magnet motor sale", "diy photovoltaic cell ", "only magnet motor ", "home energy monitor google ", "how to make power hour ", "Are magnets used in electric motors ", Energy Green · Natural Gases · Gas Saves · Dominion Resources · Texas Electricity · Company Electric · All Power Supplies · Company Energy · Direct Energy & How does a magnetic motor work )