:jawdrop: u use this same construction tool on the chipper ? like 2 birds one stone:censored:Don't use a cutting torch. I know you're just joking. I wouldn't use a hammer either. I'd assume you're joking also, Mike, but sometimes I'm not so sure where you're coming from.
I don't believe I suggested that anyone should do their rakers with an angle grinder, but rather that, under the pretenses of using personal safety gear, and as long as I'm out there sharpening the chipper knives, that I will do it that way. I didn't even suggest that it was a better way to do it, just that it was faster, and even then, only with the larger 24 and 36" chains.
Did I mention 'light touch'? That keeps the wheel from taking off too much, and keeps the wheel from leaving cross-marks across the top of the raker. The top of the raker should be rather smooth when you're finished.
I've never measured how much I take off from a vertical perspective. I do it visually, gauging it horizontally. Since the raker starts out dome-shaped, by touching it with the grinding wheel you can estimate by looking at the newly exposed metal, left-to-right. The deeper you go, the wider the new shine. Just take off a little, and do every one of the rest the same.
The result is essentially the same as doing it with a hand file. If you're grinding wheel is out of round, you will know it by the chatter and this is definitely unsafe.
Under the scrutiny of a raker gauge, I imagine they'd all be fairly close to one another. Since I'm only taking off a fraction, any differences between heights would have to be a fraction of a fraction.