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Hollowing Woodturning Jig

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Project by Bob A in NJ posted 07-22-2019 05:05 PM 739 views 3 times favorited 10 comments Add to Favorites Watch

Made this jig and new tool rest this weekend after seeing many designs at the AAW Conference in Raleigh last weekend. Made with 3/4” square aluminum bars and a 2” round piece to cut the groove in the tailstock yoke. The 2” pivot point has a draw bar to keep the yoke from turning in the quill.

The carbide cutter on the end was purchased from Cap’n Eddie on YouTube. That’s attached to a piece of 1/2” round stainless steel bar. The laser pointing device is from Ron Brown’s Best Collection.

The yoke with the morse taper took 4 hours so its not a good repeatable solution with my small metal lathe. I have a few ideas how to make the next one that attaches the morse taper to the quill much faster but I would love to here some of your ideas how to do this also.

Fun little project, now I have to make some more hollow forms and vases.

Thanks for looking and feel free to supply construction ideas to make the next one better or more manufacturable.

Bob A in NJ
July 22, 2019

To see the video——>>>> https://youtu.be/E8TsyuI4YfY

-- Bob A in NJ





10 comments so far

View lew's profile

lew

12821 posts in 4202 days


#1 posted 07-22-2019 05:54 PM

Wow! That is awesome! Having metal working capabilities sure comes in handy!!

I recently converted a “Pet Laser” to use a 5v USB power supply for checking wall thicknesses. That really save buying batteries.

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

View HokieKen's profile

HokieKen

10206 posts in 1585 days


#2 posted 07-22-2019 07:27 PM

Very cool Bob! I like these rigs a lot and this is one of the better designs I’ve seen :-)

For attaching the Yoke to the quill, if I understand what you’re asking, can’t you just buy a MT to threaded arbor adapter and drill/tap the mating threads in the yoke?

-- Kenny, SW VA, Go Hokies!!!

View Jim Jakosh's profile

Jim Jakosh

22991 posts in 3552 days


#3 posted 07-22-2019 07:48 PM

Nice , Jig, Bob!

Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View Bob A in NJ's profile

Bob A in NJ

1251 posts in 4446 days


#4 posted 07-23-2019 03:42 AM

HokieKen, Great idea, much easier to buy one at this low cost. Thanks.

-- Bob A in NJ

View HokieKen's profile

HokieKen

10206 posts in 1585 days


#5 posted 07-23-2019 11:26 AM



HokieKen, Great idea, much easier to buy one at this low cost. Thanks.

- Bob A in NJ

I didn’t watch your video yesterday Bob. But after seeing it, I realize you used a drawbar to prevent release. The adapter I linked does not have a thread in the back for a drawbar. Just wanted to point that out when I noticed.

That being said, my gut feeling is that the drawbar is probably not necessary. There are obviously lateral forces at play but I would be surprised if they’re sufficient to release the taper fit. Then again, I have been wrong once or twice before….

-- Kenny, SW VA, Go Hokies!!!

View Lazyman's profile

Lazyman

3658 posts in 1834 days


#6 posted 07-23-2019 01:30 PM

Very Cool! I’ve been thinking about something like that myself. Instead of using the tail stock and MT, did you consider just making a stand that mounts on the ways? (Maybe that is what the 4×4 in your pictures is?) I don’t have the tools to make that pivot. I was thinking that maybe I could find an old u-joint and adapt half of it to act as a pivot?

Kenny, You really need one of these for that new lathe you’ve been refurbing.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

View HokieKen's profile

HokieKen

10206 posts in 1585 days


#7 posted 07-23-2019 01:43 PM

One of these has been on the list since my first beer mug Nathan ;-) Of course that was 2 years ago and I haven’t even started thinking about making one. I do like the simplicity and robustness of this design enough though that it may not be a lot longer before I get started on putting one together.

-- Kenny, SW VA, Go Hokies!!!

View mudflap4869's profile

mudflap4869

1963 posts in 1906 days


#8 posted 07-23-2019 03:21 PM

Just a thought. A pen turning mandrel has a Morse taper on it. Could you cut that off and connect it to your yoke?

-- Still trying to master kindling making

View Bob A in NJ's profile

Bob A in NJ

1251 posts in 4446 days


#9 posted 07-23-2019 08:38 PM

Thanks for the ideas guys. I think I’ll just drill and tap a hole in the back of the yoke, then Loc-tite a 1/2 bolt x 3” into it, then cut the head off.

Then use a #2 morse taper collet with threads in it to use the draw bar concept.

Insert the bolt into the collet and I’ll be done.

Lazyman, I did think about building a separate stand but want to cut down on the number of parts and the time to fabricate them.

-- Bob A in NJ

View trydntru's profile

trydntru

17 posts in 2770 days


#10 posted 07-31-2019 08:19 PM

Great construction on a great jig. Thanks for sharing.

-- It's GOOD to be King-Mel Brooks

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