Ligature cutters (orthodontics)

I’ve have seen Tormek videos and don’t see why won’t fit my needs , but , Do you have dentist customers sharpening their orthodontic instruments ? If you do I would like to learn and do it by myself.Sharpening services are expensive (about 30-40% of the new instrument) and I hace a many of these pliers that it’s tip won’t cut as they should.
Regards
Dr. Insua
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The pliers have a flaw, you can¨t open them wide enough or even take them apart to get to the bevel with the surface of the sharpening wheel.
You need a thin device like a key file to get all the way into the plier.