Sunday, October 10, 2021

cut a circle

Finally cut a Teflon pad for the big Dobsonian I'm repairing. Used one of my hole saw bits, without the pilot, in the drill press, to cut a small circle. The 1-1/8" (28mm) bit. It's a tad smaller than the original but close enough (from an airplane). The issue is that these saw bits are measured by their outer diameter; the next size up, 1-1/4" (32mm), would make a circle too large. With a box cutter, I chamferred the top edge. Next steps: sand with course grit the bottoms of all and re-glue into the Dob ground plate... Dizzard! I'm all out of epoxy.

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