Lantern Chuck AKA Screw modification chuck

I needed 3 dog point screws for my new heavy duty tripod. Already had some nice brass thumb screws but they lacked the dog point.
Shelley had a nice one on Homemade tools a few years back that I liked so I made my own version based on his pictures.
Here is the link for Shelly's version..
http://www.homemadetools.net/forum/l...090#post103230

Here is the link for my Heavy Duty Tripod..
http://www.homemadetools.net/forum/h...e-camera-65317

I used a 7/8-14 piece of all thread for the arbor and some mystery metal (hot rolled 1.25" dia) for the "lantern".
It has a capacity of up to 5/8 inch using bushings of the proper size to fit the screw.
The screw is held captive by the head and threaded arbor. It gets tighter as the screw is turned in the lathe (ccw of course).
Simple flats on the arbor and lantern are used to tighten or loosen the screw in the chuck.

Bushings were made in two types. One that is threaded to be used with set screws and the other type
which is not threaded but a close fit for the nominal screw size.

Spacers were made to keep the stickout short. Works fine and hope it lasts a long time.

Cheers, JR

JR,
Nicely done and a wide range of fasteners as well.
Shelly

Thanks Shelly, your of your Lantern chuck was my inspiration for my project.

Thanks for the ideal.

Cheers, JR

Call me clueless. A picture would tell much about what this is, how it's used, what it looks like in action and what sorts of parts it enables.
Thanks

Hello Jim and thanks for checking in.
Picture number 1 shows two screws that have been modified with this tool.
One is a set screw with a Dog Point end. Very handy when you need a screw that can apply pressure at the end of the screw and not get the threads crushed on the end which would make the screw hard to remove. The other is a 1/4-20 bolt. In use the tool is placed in the lathe spindle and then the two or three threads at the end may be removed.

Picture number 2 shows the Lantern Chuck holding a 1/4-20 bolt. It is secured in the chuck with the threaded arbor and is ready to be put in the lathe so that a point, or dog point may be put on the end of the bolt.

For bolts that need shortening it can do that also.

Limited use but handy when you need it.

Thanks again, JR

Picture no 1 & No 2??? I don't see any numbered pictures!

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Thanks jjr2001! We've added your Lantern Chuck Modification to our Machining category,
as well as to your builder page: jjr2001's Homemade Tools. Your receipt:

<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="http://www.homemadetools.net/homemade-lantern-chuck-modification"> <img src="/uploads/208161/homemade-lantern-chuck-modification.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="http://www.homemadetools.net/homemade-lantern-chuck-modification">Lantern Chuck Modification</a> <span> by <a href="http://www.homemadetools.net/builder/jjr2001">jjr2001</a></span> </div> <div class="tags">tags: <a href='http://www.homemadetools.net/tag/chuck'>chuck</a>, <a href='http://www.homemadetools.net/tag/modification'>modification</a> </div> </div> </div> </div>
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Wow That is a hole bunch of chips there bravo....but don't put them in the bilge they will get rusty. nice job. merry xmas.

Hi JR
Thank you for the post I will be making one as I have over 60 3/16" copper rivets I have to thread 2BA for stays in a copper boiler I am curently making. As you can appreciate I need to find a quick way to load and unload each round head rivet, I like this method which in conjuntion with my coventry die head, think this will be a good starting point to hold the stays and cut the threads. Which will also give good repeatability as the rivet head is against a fixed stop. So many thanks for taking the time to post.
The home engineer.

Excellent..Please post your version when completed.

Cheers, JR

Hi JR
I have come up with a design to fit my little Myford ML10 lathe and once built I will share it on here. I have drawn up the proposed design for the chuck. I think it will work. (Fingers crossed). I have tried to make it as quick as possible to load and unload and to achieve this I have incorporated a quick release mechanism on the chuck. This is mainly due to the amount of rivets I need to thread. Checked the boiler drawing today and it is 62 1/4" dia. x 1" copper rivets threaded 40 TPI so worth going down the lantern chuck route as I will also have it for future projects.
The home engineer

I like the idea of the quick change addition. My version is slow especially when you have 60+ units to complete.
Cheers, JR

Hi JR
Started the lantern build this afternoon it is coming along and hope to have it finished by the end of next the week. I have ordered an Aluminium hand wheel which I hope will be delivered Wednesday, this week so I can get it finished. The quick release design seems to work so far. Thank you again for posting your chuck design it has been very useful in my build.
The Home Engineer
Here is a photo of the chuck so far.

Attachment 21495Attachment 21496

Very good. I think I see how the quick change will work. Great idea.

I like your Myford...Nice sturdy lathe.

Cheers, JR

Hi JR
All bits are now made, just waiting on the aluminium machine handle to come in the post. Once here can fit and test to see if it works as I want it too. Will do a full post when completed.
Attachment 21509

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Thanks thehomeengineer! We've added your Lantern Chuck to our Machining category,
as well as to your builder page: thehomeengineer's Homemade Tools. Your receipt:

<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-lantern-chuck-8"> <img src="/uploads/239109/homemade-lantern-chuck-8.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/homemade-lantern-chuck-8">Lantern Chuck</a> <span> by <a href="https://www.homemadetools.net/builder/thehomeengineer">thehomeengineer</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/chuck'>chuck</a> </div> </div> </div> </div>
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