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ARTICULATING ARM, low cost, easy to make, for HOLLOW TURNING

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Project by bushmaster posted 12-19-2018 04:47 AM 2588 views 9 times favorited 17 comments Add to Favorites Watch

I often look at things that I would like to have, then think I could make that myself, a plan starts to develop in my head, to clear my mind I have to get started. As I proceed I see problems or a better way to do things. If one makes a detailed plan then most likely you stick to the first impression. This project proceeded like that. It is mainly a prototype, but it is very successful in my opinion, as I have never seen a real one for used one.

Originally I thought I would make one out of steel, then I got to thinking, why not try to make one that any wood worker could make at a very low cost. Wood construction and off the shelf bearing and bolts. In this project wood will perform just as well as a steel one in my opinion. I have tested it out and found it works very well. I have made a demonstration video. https://www.youtube.com/watch?v=1ttXYMFW1gs

For this articulating arm project to keep it as simple as possible I chose to attach it to the wood lathe tailstock quill. Most of the information is on the video but I do have a few pictures

Tail stock attachment. The bottom arm is glued on but the top on is heal by the screws and bolt, otherwise you cant assemble it .

The two arms in this photo have two ball bearings counter bored in with a forester bit. Washers top and bottom with a 12mm bolt. The joints move smoothly with no wiggle when boring.

The part that hold the boring bar has a saw cut on one side, two bolts hold the bar from twisting, I drilled a hole through on the top to put a pin that would index to a slot on the end of the boring bar, so far not needed,

Disassemble view showing the bearing in the arm and washers needed. The bearings where 6102, paid 9$ on ebay for 10 of them. so even with the bolts it can be built for under 15$ American. A whale of a deal.

The boring bars where from stock I had in my shop. I had two pieces of 3/4, 4130 aircraft tubing, one with a thick wall and a short piece with a 1/8 wall. That one is adequate, just fabricated the tip from a !/2 bolt sections, welded a 1/4 inch piece of metal on, then a small 1/8 piece to clamp a 1/4 inch HHS metal lathe tool bit on.

The first piece of spalted birch had would have looked great, but was having too much fun and cut right through it

If you have always wanted to try using an articulating arm this DIY may be an option, easy to make and works well. There are ideas still rattling around in my hollow head for two more models, as I ordered 20 bearings. You can make it for the size of your lathe, CUSTOM FIT NO LESS.

Thanks for looking, comments appreciated. Check out the video too, I was quite exited about this project. Enjoy using something I designed and made. https://www.youtube.com/watch?v=1ttXYMFW1gs

Oh yes, MERRY CHRISTMAS to all of you from the NORTH POLE, I appreciate all of you great craftsmen and and seeing all your fine projects.

-- Brian - Hazelton, British Columbia





17 comments so far

View crowie's profile

crowie

3195 posts in 2458 days


#1 posted 12-19-2018 05:01 AM

Good to see you back in the shop continuing your innovative ways.
Must be cold outside by now.

-- Lifes good, Enjoy each new day...... Cheers from "On Top DownUnder" Crowie

View mdzehr's profile

mdzehr

332 posts in 875 days


#2 posted 12-19-2018 05:42 AM

Ingenious! Absolutely brilliant, Brian! I’ve ordered the ball bearings and need to get to work.

-- Mike, Lancaster PA

View Wildwood's profile

Wildwood

2739 posts in 2641 days


#3 posted 12-19-2018 10:51 AM

Have a Lyle Jamieson with homemade laser set up, but looked at all the articulating arm systems out there yours is most simplest homemade system have ever seen.

Great job and thanks for sharing.

-- Bill

View hunter71's profile

hunter71

3438 posts in 3693 days


#4 posted 12-19-2018 11:27 AM

Looks tough enough to do a great job.

-- A childs smile is payment enough.

View Redoak49's profile

Redoak49

4181 posts in 2495 days


#5 posted 12-19-2018 11:52 AM

Very well done…great design and build. The video is also great.

View Jim Jakosh's profile

Jim Jakosh

23365 posts in 3612 days


#6 posted 12-19-2018 01:15 PM

Real nice hollowing tool, Brian!! I like your video . I can’t work behind my lathe like that! The style you made is similar to the Elbo hollower that clamps on the tailstock quill. I had considered that but I have two banjos so I used them both like I did with the Jamieson loop arm system.

You sure did a nice job for little money. It is great to have the metal working capability to go along with it. I like that curved tool bit holder for getting inside the shoulder of the piece.

Cheers, Jim

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

View toyguy's profile

toyguy

1697 posts in 4344 days


#7 posted 12-19-2018 01:55 PM

well done. great idea.

-- Brian, Ontario Canada,

View doubleDD's profile

doubleDD

8648 posts in 2550 days


#8 posted 12-19-2018 02:13 PM

Very innovative. This looks like something that anyone can accomplish. Well done.
Thanks for the great video.

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

View Ivan's profile

Ivan

15059 posts in 3374 days


#9 posted 12-19-2018 04:22 PM

WOW! Great looking tool! Very sofisticated! I bet bowls will turn even better from now.

-- Ivan, Croatia, Wooddicted

View Roman - THE BOOTMAN's profile

Roman - THE BOOTMAN

1010 posts in 3193 days


#10 posted 12-19-2018 05:03 PM

It’s that clean, fresh Hazelton, BC mountain air that makes you invent those wonderful woodworking tools, Brian. Enjoyed the presentation!
For all the American and also the Canadian LJer wanderers, when planning a visit to Alaska, you will drive right past Brian’s place on your pilgrimmage. I used to work in the neighbouring town of Smithers and had a lot of clients in the Hazeltons, Kispiox, Kitwanga and Terrace areas! It is extremely beautiful country where Brian lives.

Merry Christmas Brian.

Looking forward to your next post.
The Bootman!

-- Author of POWER CARVING BOOTS & SHOES - Schiffer Publishing. Available online or your favourite bookstore.

View ralbuck's profile

ralbuck

6112 posts in 2773 days


#11 posted 12-19-2018 05:17 PM

BRIAN: we have come to expect the UNEXPECTED and very well done projects from you!

Just your usual great job.

Better apply for the patent!

-- Wood rescue is good for the environment and me! just rjR

View ZAGREB's profile

ZAGREB

1252 posts in 2157 days


#12 posted 12-19-2018 10:03 PM

very clever and useful tool you made

-- bambi

View Grumpy's profile

Grumpy

25623 posts in 4358 days


#13 posted 12-19-2018 11:26 PM

That is one serious jig. Well done.

-- Grumpy - "Always look on the bright side of life"- Monty Python

View Vince's profile

Vince

1208 posts in 3936 days


#14 posted 12-20-2018 02:00 AM

Great job

-- Vince

View Julian's profile

Julian

1484 posts in 3197 days


#15 posted 12-20-2018 02:37 AM

That’s a great hollowing tool. I made one out of steel and aluminum that mounts to my lathe bed. Thanks for sharing.

-- Julian

showing 1 through 15 of 17 comments

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