I was once told that taking a grinder or cut off wheel and before attaching it to the tool, you balance it on like a screwdriver through it, lightly tap the disc and listen for the sound it makes. A ring sound is good. A lower thud sound probably indicates that there is a crack in it and it should be discarded in the trash. Small Dremel disc I have had come apart after they have worn more than you should allow them to be worn down, but averted any injury luckily. While welding I have had spatter land on the back of my neck. I turned up my collar on my medium weight linen jacket I wear, but later added a make shift skarf of some natural cloth material. Sorry to hear about Bob. The guard on the grinder can be adjusted, but yea only so much good can it do. Of the minor current issue I just had with changing out a belt tensioner on my truck, I only had some other gloves too large and stiff to use in tight spaces. With bare hands the knurled surface on my torque wrench causes abrasion. I plan to sand down the handle and wire brush and clean it to what I think would be better. As for awkward climbing around the engine compartment I have to rest some sore muscles a few days. Hey the wa wa sound has gone away. Oh before I forget, or maybe I should leave it out? Not that Car Talk Radio giving me the idea that the sound was the pulley bearings in the belt tensioner was a bad idea. No, but a friend that mentioned if you do not have a stethoscope, and not using a small hose either as on Car Talk Radio mentions, but a large screw driver with a big handle to transmit the sound to the ear. The fan blade was but only about 4 inches from the plastic fan blade. A the time I turned my head to put the long screw drivers handle to my ear, I was not able to look at the screw driver. Discerning, but there was grinding sound heard and that pinpointed that part as the culprit. You see the wa wa sound was only at certain rpm just above idle. The grinding sound using the method was only heard on that part. Pretty neat, but I think getting my Parabolic Amplified Mirror Kit (Big Ear) assembled and see if it can do the same without even touching the engine.
