Make sure you grind flat where the set screw may be on the shaft. And make sure you measure the spot where your length is. I was just guessing and could really use a little longer. I got this working, but longer would be easier. Also, I live in the US and rarely use the metric system, so make sure all of your components are listed in metric. .47" is NOT 12mm, although some websites and links say it is. This is why I had to buy 12mm bearings.
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