If you can take the part off, use a drill press or mill.
You need lots of down pressure, way more than a hand drill can apply.
Slow speed with cobalt or HSS drill, and cutting oil. Carbide is better, especially if you have to use a wood drill press, which won't go slow enough for cobalt or HHS. Solid carbide bits are very expensive and brittle. The part needs to be clamped down or the bit will break instantly. You might get by with carbide tipped masonry bits, maybe...
A plasma torch will cut it if the tyne is wide enough to dissipate the heat. You can make a circle template to clamp on the tyne. Put the plasma torch inside the template hole, practice on a piece of scrap. The template will get the hole where you want it, get in and out quick before the heat spreads.
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