1

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The finished jig. I made it from a piece of 6061-T6 aluminum stock 4-3/4" in diameter by 3" long.

2

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Showing the mounting clamped in the chuck.

3

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Inside. The jig is back cut to allow for cut pieces and to make for the extraction.

4

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The PTFE blank fits snug

5

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It must be driven in with a rubber mallet.

6

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The PTFE fits flush with the surface of the jig.

7

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I make a first pass to round the hole and then measure it.

8

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Next pass finishes the hole to size.

9

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Finished cutting.

10

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Extractor made from a hex head bolt clamped in the tool holder.

11

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Ready to go inside.

12

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The bolt head slips behind the edge of the chimney.

13

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Using the carriage I extract the chimeny.

14

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Pulling in one spot works fine. It all slides right out...

15

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and drops onto the extractor bolt.