ferrite machining?

I go with the sow discord effort.

I do not afford him enough credence to have the brains to have actually been able to glean the glaringly obvious meaning that I was conveying.

We'll yet see the other fellow coming back to describe how the individual magnetic cells of the ferrite medium will fuse together at the heat sites, yada, yada, yada...

It would take a LOT of local heating to change enough of the medium that is in play during operation to make a difference to said operational characteristic. Grinding just doesn't apply that kind of heating, and the makers agree that grinding is the way these things are to be manipulated.

Does a pot core with rounded corners take a performance hit over the cheap, easy mold, punched out jobs that have the sharp, squared corners, or is even that little bit of extra mass "in-play" magnetically speaking as a function of the whole pot core's characteristic functions?

I say the rounded corner job is fine, if not even better. They cost more though, and are slightly weaker mechanically.

The 'ceramic' guy might be back too. I said they were not ceramic(s). They are not. They are "ceramic like" in their manufacturing process. That is where it stops. Ceramics are not 'machinable'. Ferrites are.

You were complaining that part of my response was "unnecessarily nasty" which isn't any kind of technical point, and what you snipped was entirely germane to assessing the level of nastiness that might have been appropriate.

And who did you consult to find out what someone with a modicum of sense would have thought?

-- Bill Sloman, Nijmegen

Sadly, he does.

-- Bill Sloman, Nijmegen

But, granting that the admiration comes fron BlindBaby, not worth much.

-- Bill Sloman, Nijmegen

Regular ferrites aren't resin-bonded. You can get resin-bonded soft and hard ferrites and, but the resin dilutes the magentic material and the magnetic performance is consequently poor.

You may have only intended to claim that soft ferrites are relatively soft as sintered materials go, but to claim that regular ferrites are expoxy bound sintered matrices is simply wrong.

Sintering depends on the same process of solid state diffusion that makes ceramics hard, but managanese-zinc and nickel-zinc ferrites aren't ceramics -inorganic non-metallic solids - and shouldn't be expected to have similar properties, or to react to heat treatment in the same way.

-- Bill Sloman, Nijmegen

All sintered things are brittle. Watch the temperature.

The problem isn't one of melting together. It is one of the thing becoming multiple bits of broken material.

Since the rest was insulting I removed it. The OP wants to cut a groove into a rod.

The problem is mostly the local temperature rise. If you are careful, you can cut an O-ring groove into a rod core to seal the place where it goes through a wall. Fine work can be done but when making any sort of a groove a lot of care is needed.

On Sat, 12 Jun 2010 08:59:01 -0700 (PDT), Bill Sloman wrote:

Sadly, you prove yet again that you are a sub-human, pathetic prick.

Sadly, you prove yet again that you are a sub-human, pathetic prick.

Ferrite are specifically formulated to keep the magnetic particles APART from each other, idiot.

They don't, idiot. That is why they are described as being "ceramic like".

You're an idiot. Your temperature must not have been watched well enough.