X-Head Porting....

I’ve heard of people breaking/damaging burrs using electric grinders when the burr gets pushed into, or sucked into an area of the port where it wedges itself in tight....... and the inertia of the heavy(compared to an air grinder) armature just won’t stop as fast as the burr does.
Then, you often get broken teeth, a bent shaft, or the burr itself just snaps off the shaft.

The only time I’ve ever used the typical
“Electric die grinder” is if I’m tweaking something at someone else’s shop.
To me, they’re very difficult to use for porting.

If I happen to get a burr stuck in a crevice in a port somewhere with an air grinder....... it just stops turning, and there is no drama.