Gold Ferrous

Probably is, and either a Chinglish translation, or from some marketing 'whiz' that isn't very astute in technical matters. I have noticed however that the TiN coating on inexpensive drills looks nowhere near as good as on quality stuff. Assuming the cheap tools really do have a TiN coating... Don't know if it's something else, a poor job of coating, or just a very thin flash coating. Or some combination of the above.

Jon

"Bob La Londe" fired this volley in news:ieb6hp$u63$ snipped-for-privacy@news.eternal-september.org:

Bob, it could be just what it says, "Iron disulfide", better known as "Fool's Gold" or Iron Pyrite.

There's no reason why they couldn't chemically deposit a layer of that on the drills, and do so more easily and cheaply than a TiN coating...

It would _look_ right, but wouldn't do a damned thing for the cutting properties. And, because it's hard and brittle, would probably spall off pretty quickly in use.

LLoyd

I think "Gold Ferrous" is just a mistranslation of the Chinese characters for "Colored Gold".

Iron Pyrite coated, perchance - all the gold that's fit for fools. Right color, right price for cheap china junk where even a bit of titanium might be too much like money to spend on gold-colored, butter-soft (or glass-hard, or both) drill-bit-shaped-objects.

My evening machine shop instructor simply called the Tin coated tools "gold". He explained that he just meant that they were gold colored. An easy way to identify them. I don't think he thought much of them.

Pete Stanaitis

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Bob La L> What the heck is that. I noticed that label today on a box of