Wednesday, November 22, 2017
Estes Star Speeder #1366 Build, Part 2, Cutting Centering Rings
These centering rings fit a BT-20 tube into a short length of BT-55.
Draw a vertical center line before tracing around the two tubes.
Use a new sharp blade and only cut the inside circle for now.
Because you traced around a BT-20 tube, the outside diameter line is wider than the whole you need to cut. Cut just inside the pencil line.
You've read this before - Don't try to cut through with one pass. Use lighter pressure for more control and a smoother arc of the cut.
There will probably be a rough cut edge.
I wrapped some 220 grit around a used engine casing to smooth out the center hole.
Sand a bit and check the fit.
The BT-20 main body tube has a good friction fit in the centering ring.
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