Flatten side of SG 250 with grading stone?

[DoggyForager]

Hi, I use the flat side of the SG 250 quite a lot and am thinking it will get dished at some point.

What do we think of using the grading stone to 'true' the side of the stone back to flat?

[Ken S]

I don't like the idea of using the side of a non diamond wheel to flatten a tool and trying to true the stone with the stone grader.

Before Tormek introduced diamond wheels, the dreaded hollow grind was not considered a problem with large diameter grinding wheels. If one felt a need to correct for a hollow grind, the easiest way was just to set the Anglemaster to 28° instead of 25°. Flattening could be minimized in several ways: 1) Purchase premium chisels which require considerably less flattening. 2) Only purchase the chisel sizes you actually use. Years ago, I purchased a complete set of Marples Blue Chip chisels from 1/8" to 2". I labored at flattening the backs. When I eventually gave the set to my nephew, some of the larger widths had never been used, and the backs were never flattened. Half a dozen chisels are more than enough. 3) Chisels with a "belly", where the middle of the back, ideally should be returned to the dealer. "Concave" chisels, where the middle of the backs dips, only need the edge area to be coplaner. For plane irons, do an online search for "David Charlesworth Ruler Trick" which will eliminate most of the flattening time.

In the past, I used oilstones, waterstones, and wet and dry sandpaper on glass for flattening. Recently I have switched to diamond stones. For my low volume needs, these are sufficient.

Ken

[Thread Killer]

I'd worry about changing the width SG-250 wheel. If you are using the flat side enuff to dish it, I would invest in a diamond wheel.

[tgbto]

I haven't tried yet, but maybe it's possible to setup the MFB in such a way that you could somehow use the truing tool on the side, at least between the outer edge and a minimum radius ?

[Ken S]

I'd worry about changing the width SG-250 wheel. If you are using the flat side enuff to dish it, I would invest in a diamond wheel.

The taboo about grinding on the side of the wheel is an old safety issue with thinner wheels exploding on high speed dry grinders. it really isn't an issue with 50 mm thick slow speed Tormek wheels.

Ken