Greenwatts

Bearing Assembly

To make a bearing cut a hole out of the top of a 2" deep cap** using a 1.5" hole saw making sure the cut is centered. Then cut the skirt of the cap to the required length as in the drawing.

File flat the bottom of the square on the drain plug, drill a bolt hole. Place the drain plug into the cap as shown and attach the main gear with a bolt nut and lock washer. Cut a .250" slice from the end of a 1.5" fitting collar which will be inserted and glued into the cap to hold the bottom drain plug in place and form the main bearing.

The remaining skirt piece of the deep cap is placed on the bottom of the cap top to form a collar around the main gear. The gear should extend about .125" above the edge of the collar. You will also need to cut out a piece of the collar to accomodate the stepper motor gear head and shaft. Next cut off about .5" of the square piece on the second drain plug. Cut about .5" of the top of a 3" cap and center drill a 2" hole out of the top. This will be used to protect the top side of the main bearing. Glue this to the bottom of the second 1.5" drain plug collar. Then glue this assembly to the top of the main drain plug as shown. Glue a small piece of ABS to the bottom of the cap and one piece on each side of the collar to form 180 degree rotation stops. The T-fitting will thread onto the second drain plug and will be used to extend the arms to hold the PV solar panel. The thread fitting can be secured by a small through hole and wood screw.