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I received an Onoto 1822 today. It has a couple of problems, of which one can not be blamed on the restorer (who was not the seller) although it may have influenced the other issues. These two photos of the shank or plunger cap show a manufacturing fault. The first picture shows the end of the rod pin, front left of centre. Note how closely it lies to the end of the cap, closer than I have seen for any other Onoto. The second (sorry about the blurriness) shows a line running to the other edge. You can see it at the back of the first photo as well. It is the pin lying at the surface past the rod, hence my analogy of a splinter under the skin. My problem will be to remove the pin without shattering the thin layer of ebonite on one half, or where it partially encloses the pin at the other end. This is necessary because the rod in this pen is too short so not only does ink cut-off not close but the plunge-fill mechanism barely functions until you screw down the shank, after which the cup washer barely clears the internal barrel lip. Basically, I intend to use heat, a staking tool, and such care and patience as I can muster. Other bright ideas will be welcomed. For example, would you think it would make a difference which end of the pin I pushed, which end emerged, the open end or the thinly covered?
I am progressing with repair of an Onoto 6233 which arrived solid with ink, with a fossilised cup washer, and the rod broken at the blind cap. My last tasks in disassembly are to remove the pins in the plunger and in the blind cap. Trying to punch them out has proven difficult. I was using a dowel with a short length of stiff 0.8 mm wire embedded in its end, and light taps with a small hammer. Before I get a bigger hammer, I was wondering whether I might not be better off simply drilling them out, using a drill press? I have not tried heat at this point, being a little doubtful of how useful it would be. I could also try the USC as a loosener except the blind cap is BHR which I do not want to immerse too long in water. Of course, I could simply re-use the existing rod by gluing its end into the cap (thus not having to disassemble that part) but the pen would then become difficult to disassemble again without worsening problems. The purist in me does not like that but the practical in me wants a working pen. So, at the moment I am leaning toward drilling out, as I will have new pins anyway. Any thoughts or suggestions on that, or effective things to try which do not require quite the same precision?