hi
how to smooth the inside after drilling 1mm holes in a 6mm ID tube?
the small dimensions are the main problems.
inside the tube i like to move a spool with o-rings. (polished finish!?)
jean
spool valve
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Technician1002
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For metal very fine sandpaper works well to lap the parts in.
Visit an automotive paint shop to watch the metal prep for a fine paintjob.
If needed start with a courser paper to get a smooth surface, then go to fine to get a polish. If your surface is not smooth, it will take a very long time with just fine paper.
With time and patience, you can get a mirror finish. Note the reflection.
Course sanding was used to remove the pipe seam.
Visit an automotive paint shop to watch the metal prep for a fine paintjob.
If needed start with a courser paper to get a smooth surface, then go to fine to get a polish. If your surface is not smooth, it will take a very long time with just fine paper.
With time and patience, you can get a mirror finish. Note the reflection.
Course sanding was used to remove the pipe seam.
Last edited by Technician1002 on Fri Mar 15, 2013 12:17 pm, edited 2 times in total.
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Labtecpower
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I would take some very fine (>400 grit) sanding paper and fold it to a ball. Then put it in the tube and push it through with a small stick.
Repeat a few times, and it should be plenty smooth.
Repeat a few times, and it should be plenty smooth.
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jackssmirkingrevenge
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A 1mm spool valve 
Where did you get the o-rings from?
Where did you get the o-rings from?
hectmarr wrote:You have to make many weapons, because this field is long and short life
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Labtecpower
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A 1mm spool valve
6mm ID tube
Butane lighters are a good source I think
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jackssmirkingrevenge
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Ahhhhh... he means porting holes... ok...
hectmarr wrote:You have to make many weapons, because this field is long and short life