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Closeup of hub showing layout, I will drill and tap for 4-40 screws later to help retain the sensor
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Overview of the unit, note set screws to retain the sensor, these will squeeze a piece of sched 20 pvc spacer around the base of the hard drive motor
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Cup detail, Screw should pass through cup for maximum durability. I plan to move to stainless all thread or threaded brass rods in the very near future (before I put it on the roof). This design does stay together at sustained 70 mph windspeed though.
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Closeup of hub, spacer ring is drilled then threaded. If you do this use lots of cutting oil on the tap! You have no room for error due to the thiness of the ring. The fit of this ring to the spindle is snug enough that you will have to clean up the inside of it after drilling and tapping to make it fit.
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There is a spacer ring that fits in here to make it a snugger fit
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This is how it will mount, the direction indicator will go on top, by mounting it downward this way we eliminate most of the problem with water getting inside of the motor. The bearing is of such high quality that it doesnt care one way or the other.