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Floating Base Jig

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Project by TheDane posted 04-03-2020 05:10 PM 723 views 7 times favorited 15 comments Add to Favorites Watch

Most segmented woodturners use a solid disk for the base of their turnings. That works, but the bigger the disk, the greater the risk of it cracking. I rue the day that one of my customers calls to tell me the 5” bottom on the yarn bowl I sold her has cracked (hasn’t happened yet!).

I now install a ‘floating base’ instead of a solid disk. The ‘floating base’ is a solid disk inserted into a groove or recess that has been cut into the inside of a ring composed of segments. The groove or recess is cut a little deeper than the diameter of the ring, allowing for seasonal movement of the disk.

There are several ways to cut the groove … I built a jig (based on one designed by Kevin Neelley) to cut a groove for floating bases. Like Kevin’s, this jig rides on the tablesaw fence. It has a vertical fence that is replaceable and sacrificial … it is cut at an angle that is complementary to the segment. I did 4 fences for 12, 16, 20, and 24 segments.

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"





15 comments so far

View Andre's profile

Andre

3447 posts in 2535 days


#1 posted 04-03-2020 05:25 PM

Great idea, don’t think there is much concern with 5 – 6” bases unless they get to thin?

-- Lifting one end of the plank.

View Underdog's profile

Underdog

1494 posts in 2765 days


#2 posted 04-03-2020 05:45 PM

Why not segment the base too? Just curious…

-- Jim, Georgia, USA

View oldrivers's profile

oldrivers

2130 posts in 2296 days


#3 posted 04-03-2020 05:59 PM

Very good idea I see where this will stop a lot of heart aces thanks for sharing.

-- Soli Deo gloria!

View Dutchy's profile

Dutchy

3676 posts in 2898 days


#4 posted 04-03-2020 08:53 PM



Why not segment the base too? Just curious…

- Underdog

Than a vase had to start with bottom smaller than 5-6” otherwise the problem will remain in my view. Also a bottom of 10” made out of segments will crack. Or am I wrong?

-- https://dutchypatterns.com/

View Dutchy's profile

Dutchy

3676 posts in 2898 days


#5 posted 04-03-2020 08:54 PM

View TheDane's profile

TheDane

5812 posts in 4392 days


#6 posted 04-03-2020 09:50 PM

Great idea, don t think there is much concern with 5 – 6” bases unless they get to thin?

- Andre

I draw the line at around 4 inches … smaller than that should be okay, bigger than that and the risk increases. Depends on species, climate, etc.

Why not segment the base too? Just curious…

You could, but I don’t do bases that way … don’t like the appearance of a center plug, and it is darn near impossible to get the miters to meet correctly in the center.

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

View bushmaster's profile

bushmaster

3938 posts in 3012 days


#7 posted 04-04-2020 02:45 AM

Great idea.

-- Brian - Hazelton, British Columbia

View Julian's profile

Julian

1571 posts in 3420 days


#8 posted 04-04-2020 03:42 AM

Super idea. I will have to start using this method. Thanks for sharing.

-- Julian

View woodsmithshop's profile

woodsmithshop

1411 posts in 4275 days


#9 posted 04-04-2020 12:41 PM

Looks like a great idea, I think I’ll try it. Do you spot glue your disc?

-- Smitty!!!

View doubleDD's profile

doubleDD

9341 posts in 2772 days


#10 posted 04-04-2020 02:13 PM

Slick working jig. Good idea. I could almost see converting a tenoning jig into one of these.
Could you not make the groove on the table saw or router table before cutting the stock into segments?

-- Dave, Downers Grove, Il. -------- When you run out of ideas, start building your dreams.

View LesB's profile

LesB

2506 posts in 4172 days


#11 posted 04-04-2020 05:07 PM


Could you not make the groove on the table saw or router table before cutting the stock into segments?

- doubleDD

This thought came to me almost immediately. One step procedure but it won’t work if you are flipping the board every cut to avoid waste. So your solution saves wood over time. Good idea.

-- Les B, Oregon

View TheDane's profile

TheDane

5812 posts in 4392 days


#12 posted 04-04-2020 10:11 PM

Do you spot glue your disc?

Depends on the disk. If it is solid wood, yes … a drop of glue on each side of the end-grain when I insert it into the base ring.

If it is plywood, no. I often use a piece of 1/4” plywood that has veneer on both sides that matches the wood species of the base ring.

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

View CoolNik's profile

CoolNik

12 posts in 1248 days


#13 posted 04-05-2020 12:27 AM

Hi Gerry,

Great job on this jig and the parts – really nicely makes too.

Any thoughts on selling a set of these? I am disabled and it’s jigs like these that makes things much easier for me to manage to do segmented turning. Due to my disability, all my learning has to be done either on-line (inc. YT) or by reading. This lockdown is great for the woodworker with holidays but all it makes me want to do more woodwork than I am capable of, hence my question!

-- Cheers, CoolNik

View TheDane's profile

TheDane

5812 posts in 4392 days


#14 posted 04-05-2020 03:27 AM

Any thoughts on selling a set of these?

I’m flattered … but must decline. Thank you for commenting.

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

View Diggerjacks's profile

Diggerjacks

2325 posts in 3868 days


#15 posted 04-06-2020 06:00 PM

Hello The dane

This a very cool idea and jig

Thanks for sharing

-- Diggerjack-France ---The only limit is the limit of the mind and the mind has no limit

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