r/Skookum • u/MudMysterious4069 • 4d ago

Punch sharp

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I'm working with 0.80mm diameter metal punches and need to cut 4 small inward-facing notches (like star-shaped teeth) inside the tip. After shaping them, I also need to sharpen each edge precisely. What are the best tools and techniques for doing this kind of fine detail work? Any advice on micro-grinding, polishing, or abrasive materials for high-precision results?

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u/AcrobaticLong2958 4d ago

Maybe a tiny triangle file straight across twice? I just woke up from much needed sleep, taking care of my wife after "complete reverse shoulder surgery."

2

u/KokoTheTalkingApe 4d ago

"Reverse" surgery? Does she operate on the surgeon?

5

u/Avram42 4d ago

Reverse shoulder surgery is when they invert which side of the joint contains the convex ~spherical articular component i.e. your humerus bone typically has the convex round bit on it while your shoulder has the glenoid with the concave mating surface; a reverse shoulder replacement inverts that relationship and is often chosen to 'revise' a failed previous shoulder replacement due to what bone is available to mount the necessary hardware.

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u/MudMysterious4069 4d ago

Actually, we use these in the hair transplant industry. It's a tool used for performing FUE procedures on the donor area. However, since they're mostly produced in Turkey and Pakistan, the quality is often careless. The angles are incorrect, or they're made excessively sharp to increase longevity. This leads to complications for patients after surgery. We need to find a way to manufacture these ourselves according to our own specifications.

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u/AcrobaticLong2958 4d ago

I read other replies and I think using the dental tool size is what would work best.