Commit d78e70e0 authored by Drew Griggs's avatar Drew Griggs
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paragraph on runout

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......@@ -77,7 +77,9 @@ Radial runout occurs when the drill bit is not perfectly centered in the spindle
### Testing runout
To test both types of runout, we are using the [Mitutoyo 513-402-10T test indicator](https://shop.mitutoyo.eu/web/mitutoyo/en/mitutoyo/1303999270156/Dial%20Test%20Indicator,%20Horizontal%20Type/$catalogue/mitutoyoData/PR/513-402-10T/index.xhtml). All information about the test indicator can be found at [this link](https://ecatalog.mitutoyo.com/Dial-Test-Indicators-SERIES-513-Horizontal-Type-C1258.aspx)
To test both types of runout, we are using the [Mitutoyo 513-402-10T test indicator](https://shop.mitutoyo.eu/web/mitutoyo/en/mitutoyo/1303999270156/Dial%20Test%20Indicator,%20Horizontal%20Type/$catalogue/mitutoyoData/PR/513-402-10T/index.xhtml). All information about the test indicator can be found at [this link.](https://ecatalog.mitutoyo.com/Dial-Test-Indicators-SERIES-513-Horizontal-Type-C1258.aspx)
To test for runout, we used the test indicator to determine how the angle of the bit changes as the machine runs. As the bit spins, if it is even barely misalligned, it will have a different position along the bit at different angles. Ideally, we would have a change of 0, but it is difficult to get it perfect. We found that our bit was slightly misalligned, but it was such a miniscule amount that it could be ignored.
![](../images/week05/RunoutMeasuer.jpg)
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