West Bay Woodturners

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Reverse Chucking A Natural Edge Bowl

This odd shaped blank of camphor was destined to become a semi-natural edge winged bowl. I roughed turned it on 17 October 2025. It clearly had some serious inclusions.

I returned (pun intended) to it in mid-November. Alas some of the inclusions and their associated voids did not get turned away.

Interior void
Exterior void

I filled these with two part epoxy mixed with some fine desert ironwood dust for color. The exterior surface was dammed with exterior blue painter’s tape. (It’s smooth.) I left the bowl on the chuck so I could turn away the excess once it had set. (Note: As it was a cold day — for California at least — the 30 minute epoxy took much longer to set.)

I carefully removed the overfill using a 2″ sanding mandrel starting with 80 grit, and finishing with 320.

Interior fill
Exterior fill

To remove the tenon, I fashioned a jam block to match the interior profile of the bowl using a profile gauge.

The chuck, which was still holding the bowl, was mounted on a live tailstock spindle adapter, so that the bowl could be aligned with the jam hub so as to run true. A couple of layers of friction cloth buffered the hub and the interior bowl surface. Two clamps were used to maintain the bowl position while the chuck was removed and replaced by a tailstock live cone center with a Raffan button to protect the base (not shown here).

Bowl clamped before chuck replaced with live center (and button).

The tenon was removed, and the foot shaped, and the bowl was parted off.

Parting off under the protective button

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