I need to drill out a small steel sleeve that is inside a dead plastic firing seal in a competition CO2 pistol (Czech Tau-7). The normal approach for seal replacement involves yanking it out with a brass wood screw, but this is a very early one. The older seals have a small tube inside that needs to be drilled out so the woodscrew can dig into the seal.
I really don't want loose metal chips floating around inside. That is a guaranteed way to end up with a leak, or worse, to chew up the new seal.
There isn't much metal to remove. The sleeve is only 15-20 mils thick, ~0.2" in diamter, and about 1/8" long. I've been planning on doing it upside down so the chips will fall out of the action, and I can park a vacuum nearby to try to encourage that. There are a couple of small pasageways the chips could get into. Although I will clean it as best I can, there's only so much I can do without completely disassembling the trigger, firing mechanism and removing the sights. I will hose down the inside with solvent first, to remove any oil that might attract chips.
I was thinking that if I magnetized the drill bit, the chips would stick to that, and not float around inside. The possible downside is that if the chips get magnetized and get loose, they will then stick to the inside of the pistol, which could be worse than just having them loose.
Any thoughts?
Thanks!
Doug White