(2 Reviews)
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This spins fast and quiet. We bought and used 100s of them. There are 5 coils, unipolar. The output pattern is 1 2 4 8 16. We used it for an embedded system lab here at the University of Texas. See https://docs.google.com/document/d/1AJNMmXDCZ6c5dT7qppv1dYuUTIFj9mAG9b5dlLPxQRM/edit?usp=sharing
You can remove the bushing by prying with a notched pry bar sharpened to a wedge, and finishing with the hooked end, which gives more leverage--rotating the shaft helps, too. From 24 bushings removed I can say some are tighter than others. The shaft is 5 mm. Clamp the case in a vise.
