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Old 12-14-2008, 11:53 PM   #1 (permalink)
 
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Default Closed End mandrel idea - Photos Added

I may not be the first to post this, but I haven't seen it so I thought I would put it up here.

So I wanted to make a closed end pen, but I didn't want to buy a bunch of closed end mandrels, so I had an idea to make some shims. I purchased a 7mm mandrel from Arizona Silhouette, then I glued up a scrap piece of wood to a standard 7mm tube. I then turned the blank down to the same diameter as the pen kit I wanted to use. My first one was a Jr Gent. After I had the blank turned down to fit inside the tube, I split it in half with the band saw. I then had a set of shims I could use with the 7mm mandrel.

--Edit For More Details--

So I added some more pictures. Basically you start buy gluing up and turning a blank into a sleeve so that it just fits inside the tube you are using for the closed end. I turned until I was close, then finished the sleeve to size with sand paper. You also want to trim the sleeve so it is shorter than the actual tube you will be using for the closed end pen.

Next you split the sleeve in half. I used a bandsaw to do this, but be careful you've got to get those fingers pretty close to the blade. It would be much safer to use a scrap of wood and make a jig to hold the sleeve.

Now you should have 2 shims. You are ready to put everything together. first take your standard bushing, flip it around and slide it on the mandrel. Next put the shims on the mandrel. Make sure the shims are put together so they match the split in the mandrel. When the mandrel expands, you want the shims to be able to spread apart. Then you just slide it all together.

If this still isn't clear, let me know. These shims were just my initial test. I'm going to make new set sometime in the next few days, and I can take pictures along the way to put together a more complete tutorial.


--End Edit For More Details--

The nice thing about using the shims and the 7mm mandrel is I can flip my bushings around and continue to use them as well. So now I have one mandrel that i can use with any kit. You can see my first closed end using this idea in the show off your pens section.

Black Gold & Ironwood Closed End
Attached Thumbnails
shims.jpg   shims2.jpg   mandrelbushing.jpg   mandrelshimsbushings.jpg   alltogether.jpg  

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Last edited by davinci27; 12-16-2008 at 08:22 AM.
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Old 12-15-2008, 05:27 AM   #2 (permalink)
 
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Can you post a few pics of your mandrel idea? Thanx!
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Old 12-15-2008, 06:48 AM   #3 (permalink)
 
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2nd on the pictures. You had me until the "shims" and "splitting it in half".
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Old 12-15-2008, 07:36 AM   #4 (permalink)
 
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Sure thing, I'll take some photos tonight and post them.
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Old 12-15-2008, 02:16 PM   #5 (permalink)
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That is a COOL idea! I have that mandrel and now have something new to try!!!!

COOL.. Looking forward to the pictures too, though.
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Old 12-16-2008, 08:23 AM   #6 (permalink)
 
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I added some pictures and some more details to the original post.
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Old 12-16-2008, 10:22 AM   #7 (permalink)
 
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Nice, and a great idea! Nice pen, too.
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Old 12-16-2008, 04:23 PM   #8 (permalink)
 
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Thats pretty slick! Nice job and thanks for sharing!
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Old 12-16-2008, 05:23 PM   #9 (permalink)
 
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Totally awesome, thanks for the pics!
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Old 12-16-2008, 05:44 PM   #10 (permalink)
 
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That's a great idea Ben. I have a closed end mandrel for Baron/Sedona. I might see if I can adapt it for the cap end, and also for both ends of a Jr. Gent.

I was thinking, instead of cutting the shim in half, of building a jig to allow me to cut only one side of it on my table saw. The advantage would be not having two halves of a shim to mess with and possibly lose.
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