On Tube Casting

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arkie

Member
Joined
Dec 7, 2008
Messages
304
Location
Siloam Springs, AR
Which Fountain and roller ball pen kits work best for on tube casting? I'm looking for the most space between tube and OD without that "bloated" look.
 
The tube and bushing charts in the library can help determine what you are looking for. They provided me a quick way to make a comparison list as I also was trying for max material with out excessive bulk.
 
Most of the fp and rb are about the same from what I found, there are a couple that are bigger on one end or the other but not both. Most are about .030" +/- .003". The biggest that I have found is actually a ballpoint, the Aero. There are some things you can do to keep things thinner but take some work.

An easy thing is when you put the hands on put the hour on first then cut the "hub" off the minute hand and just glue it beside the hour "hub". The "bridges" are harder but worth it, they add a lot of interest as they have all the jewel bearings. I file them down to about .025", thinner if you are using carbon fiber. Carbon fiber itself will take up half of the .030" that you have to work with. And last bend the parts as close as you can to the tube diameter. Being over bent or under bent will cause the parts to stick up higher.

Mike
 
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