Quote:
Originally Posted by Mk.32
Also 254 used to do Delrin gearbox plates, however they later switched to pocketed out Alum because it was lighter and stiffer.
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It's not actually lighter, but it is basically identical.
The Delrin was a pretty big PITA. It was more difficult to hold tolerances on the bearing bores, the bearings could come unpressed more easily, and it flexed a bit. If you wanted to thread one plate to avoid the use of nuts when screwing the gearbox together, you had to use PEM nuts, which students can easily strip if not being careful. We much prefer aluminum.