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Making a Needle Scriber, Part 2:
Do all of that twice, and you have a matching pair. :D
Then, with an itty-bitty spotting drill, drill a tiny spot at the point of the tapered end.
Measure the needle...
Find an appropriate tiny drill bit...
carefully drill the end to about 1/2" deep. Use lube,
a lot to clear the tiny chips. These little bitty drills load
Use a Dremel with an abrasive wheel to chop the eye off a needle...
Carefully degrease everything, and use a drop of Loctite or super glue to lock the needle in place.
Like Clickspring says, if you have to replace the needle, a little heat
will free it right up.
After wiping up the excess Loctite, set 'em aside
to let the stuff cure, and they're ready to use.
The needles might be a bit too flexy and skinny to use on, say,
mill-scaled hot-roll steel,
but in that case, the cheap carbide scribers
can be used. For the aluminum and
occasionally Delrin parts I've been
working on, I think they're perfect.
But there's also another option...
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Information contained in
these pages is for reference and entertainment
purposes only. Our methods are not always the best,
quickest, safest, or even the correct ones. It's up to you to know how
to use your own machines and tools.
Keep your fingers away from the spinny blades o' death and you should
be all right.