Demonstrator, with swirls....

[bgray]

Took me a long time, but I finally figured out how to get the interior of a pen completely polished....

 

[juteck]

:good: Awesome.

 

[gketell]

That is really sweet looking.

Any chance you want to share your secret?

 

[Jim15]

Some of the people on this site are just amazing in the things they can do. Outstanding pen.

 

[MattDaddy]

That's truly unique. Very cool.

 

[wolftat]

That's sweet. Nice work.

 

[OKLAHOMAN]

I've got to find a way to polish the insides, that is just amazing.

 

[Wheaties]

Wow! That's really cool!

 

[PenTurnerfromMaine]

Now that is really nice

 

[rbragg08]

That is sweet!!

 

[hewunch]

That is really sweet looking.

Any chance you want to share your secret?

thinking the same thing... on both accounts. :biggrin:

 

[BLLEHMAN]

That is really sweet looking.

Any chance you want to share your secret?

I'm thinking that he got a bunch of ants and glued little micromesh pads to their feet!

Very Cool by the way

 

[chriselle]

Spectacular as usual Brian. I've been a long time admirer of your work. You are one of the "highliners" that keep me reaching forward.

 

[bitshird]

That's a pretty neat looking demonstrator, Great job on polishing the interior.

 

[desertyellow]

My hat's of to you.
Wow!

 

[Ligget]

Amazing work Brian, please share your secret with us!

 

[johncrane]

Brian! would l be right if l said, that blank is lucite.:question::biggrin:

 

[Blind_Squirrel]

I am not usually too big on demonstrators but that is one very nice pen!!

 

[cnirenberg]

Brian,
Awesome job. Is that Lucite? The insides came out great, I think we are all awaiting your response on the polishing.

 

[bgray]

I believe that it is lucite.

Essentially, the procedure involves a special boring bar, and lots of homemade tooling.

At first, I was trying drills with various custom ground flutes...no good. Then reamers...no good.

Nothing that I found could possibly give me an acceptable surface on the inside.

Then I found a boring bar that is super-long and thin, but still rigid.

This boring bar is used at a very high rpm, with a super slow feed. However, since the hole is very narrow on the barrel, the boring bar dominates a lot of that space. So when swarf is created, there's nowhere for it to go. This leads to lots of heat. Because of this, the boring bar needs to be retracted often to clear swarf.

From there, I have a homemade mandrel for mounting sandpaper.

And then a teeny tiny custom buff mounted on a long stainless rod.

Thanks everyone!

 

[stolicky]

Wow. Good job.

 

[Stevej72]

Very, very nice!

 

[Rangertrek]

Very nice overall concept and execution. It is amazing at the creativity of the nice people on IAP.

 

[rjwolfe3]

That is sweet. Just curious how many blanks did you chuck before you found the right method?

 

[bgray]

That is sweet. Just curious how many blanks did you chuck before you found the right method?

I have no idea....I have been working on getting a demonstrator perfectly clear for a long time now....

 

[TX_Planes]

I continue to be amazed by what you guys/gals create. It is the ideas and the dedication to solve problems and the share the results.

Very nice job.

 

[alamocdc]

Very nice!!! Boy, I need to get back to work!