So we started out with a 5 inch diameter by 9 inch long piece...at about 18 pounds.
Drill and bore out the middle 3.5 inches and we remove just about 9 pounds.
Since we used a 4 jaw chuck and took our time setting it up on both ends, indicating it with the dial indicator within +/- 0.002 inches of being concentric with the chuck...
When the second side met the first side, we could just barely see the offset. Likely less than 0.005"...gooe enough for the ID of the Collimation Tube
Pic shot down the 3.5 inch bore.
-------------------- A few I enjoy,
and a few more in the works ;<)
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Re: 20 inch RC Robitic Build...a TEAM Effort....
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