Best way to clean deep holes?

[Ni200]

Drilled some .070 holes 2in deep into Copper 101, and the engineers have come back with issues of debris/coolant at the bottom of the holes. They are having issues finding a degreaser that'll work well with copper. Do you guys have any recommendations for some product that would help?

 

[kenton]

A plastic syringe with a long blunt needle full of isopropyl alcohol or your solvent of choice to flush out the holes.

Also my congratulations on drilling holes that small and deep in copper. I would have been trying to get out of that one.

 

[DDoug]

Need to make a modified blow gun with some small tubing to get air & solvent mix down there, with room on the sides for the "Debris" to escape up & out.

 

[Ni200]

https://www.amazon.com/Quickun-Silicone-Brewing-Kegerator-Aquaponics/dp/B091T2LP9N?th=1

Something like so attached to an air gun? I was thinking of something similar. Thanks for the help.

Any recommendations for a good solvent? They are running these through a ultrasonic cleaning cycle, so I doubt we need to go much further with degreaser, but I'm something to break up the grease beforehand wont hurt.

 

[Conrad Hoffman]

Ultrasonic cleaner won't help you with small deep holes. Second the needle and syringe idea. For tapped holes we've been known to grind a tiny hook on the end of a small rod and go fishing with that. When cleaning anything, identify the enemy. What solvents remove whatever coolant you're using? Alcohol is great for some things, worthless for others. Or, go aqueous with something like Alconox. Regardless, you'll have to do a lot of flushing and rinsing, then you have to get it dry.

 

[DDoug]

https://www.amazon.com/Quickun-Silicone-Brewing-Kegerator-Aquaponics/dp/B091T2LP9N?th=1

Something like so attached to an air gun? I was thinking of something similar. Thanks for the help.
.

I was thinking of something like this or smaller is available too:

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

 

[MaxPrairie]

If it's coolant you are trying to get rid of, hot/warm water and Dawn dish soap seem to do a good job.

Disclaimer: I have no affiliation with Dawn brands.