Woodworker's Journal Shop-Made-Lathe-Chuck-Plans, страница 3

Figure 4

15. Proceed to hollow the opening with the same gouge, being sure to leave the walls about 1/8" thick and parallel to the outside (Figure 4).

16. Use a scraper to true up.

17. Remove the piece from the lathe.

18. Clamp it upright in a bench vise.

19. Use dividers to make eight equal segments on the top of the rim.

20. Use a backsaw and, being sure to stay straight up and down, make a cut down each mark to the shoulder of your chuck, creating flexible fingers (Figure 5).

21. Use 80-grit sandpaper to clean up the interior.

22. Slide on the hose clamp.

23. Cut the excess metal from the hose clamp.

24. Position the clamp so it will not catch on anything.

Figure 6

The tenons on your turning pieces should be approximately 1/2" long and sized accurately to fit your chuck. If they are too large, you could break the flexible fingers; too small and you will not be able to grip the tenon and hold your stock for turning. Tighten the clamp and test the fit before turning. If you can still twist the blank in the chuck, remove it and rub chalk around the tenon to provide enough friction to keep it from spinning.

For added safety, once the turning piece is mounted, you can wrap several layers of duct tape around the hose clamp to avoid catch your knuckles.

These plans were originally published in Volume 15, Issue 4 of The Woodworker's Journal (July/Aug. 1991, pages 40-41).