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RobWilson
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??? Themit / Thermite use's iron (III) oxide,,,,,,,, ( Fe2O3 + 2Al → 2Fe + Al2O3 + heat) So it should use the suffix ate for more/lots of oxygen ,,,,,,,,, Thermate ;D
Rob
Rob
Grinding on the Side of the Wheel?
- Thread starter Antman
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RobWilson
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Rof} Rof} Rof} Rof} Rof} 'dynamate' I think they sell that on QVC :big: :big: :big: :big:tel said:
Better get let this thread back on topic :hDe:
Rob ;D
AHhh Lew beat me to it....ringing a wheel and standing to the side during the first minute is standard practice in the machine tool business...
With a 5 pound wheel, 8 inches in diameter, going at 3600 rpm, you have about 700 joules of kinetic energy. Converting that to linear kinetic energy....as it's easier to "relate" to..
That's 5 pounds of razor sharp rocks flying at you at about 60 miles/hour
Now there's an image to think about.....
Dave
With a 5 pound wheel, 8 inches in diameter, going at 3600 rpm, you have about 700 joules of kinetic energy. Converting that to linear kinetic energy....as it's easier to "relate" to..
That's 5 pounds of razor sharp rocks flying at you at about 60 miles/hour
Now there's an image to think about.....
Dave
That's an interesting point....and I have not used one of those grinders....but if it's a "Standard" bench wheel...then I would have to say yes!....regardless of the fixture.
Lets face it....I know I have done it so I'll throw no stones most here have.....but in general you shouldn't for reasons already stated....
And for god's sake as well as your own..wear Glasses! 8)
Dave
Lets face it....I know I have done it so I'll throw no stones most here have.....but in general you shouldn't for reasons already stated....
And for god's sake as well as your own..wear Glasses! 8)
Dave
Dan Rowe
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Dave,
I had to play the video because I have never heard a bad wheel. I think the videos are a bit of a ringer because he holds the wheel properly by the center hole in the first good test and for the second bad test he has what looks like the same wheel sitting on the bench which is not how to conduct the ringing test.
Dan
I had to play the video because I have never heard a bad wheel. I think the videos are a bit of a ringer because he holds the wheel properly by the center hole in the first good test and for the second bad test he has what looks like the same wheel sitting on the bench which is not how to conduct the ringing test.
Dan
L
Lew_Merrick_PE
Guest
Woz said:
Woz,
The old General brand drill sharpening jig came with a warning to purchase a side-load grinding wheel for use with it. My own General drill grinding attachment was purchased in 1968, so I am bit out of date as to what warnings come with them today. When Pacific Grinding Wheel went out of business, I purchased a box of 72 side-load wheels from them. I assume, but do not know, that such wheels are still sold.
D
Dirty_Vinylpusher
Guest
Yeah lots of good info here.
On that note I'm gonna scurry off and clean up all the dust around my grinder..... Thm:
On that note I'm gonna scurry off and clean up all the dust around my grinder..... Thm:
I dropped a running 4” angle grinder once. The wheel hit the concrete and broke into a lot of pieces. They flew all over the room. Somehow, they missed me, but it still left my heart pounding.
I grind aluminum on a 2x42 belt sander. If I had a need to grind on a flat surface the belt sander is my choice.
Good choice... until a sharp edge catches the join in the belt, been there, done that!
Richard Hed
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LOL, I am an instructor, and I tell my students when they break a tool that that is what learning is all about. Who hasn't broken a tool? One student did exactly this, ripped the belt! Unluckily, we didn't have a replacement belt, but the ript belt was still usable by about half of it.
Also, I have a friend who turned on a stone grinder, which blew up and hit his shoullder. He was in hospital for 3 months! I tell my students that when they turn on a stone grinder, to stand to the side and make sure the path of any flying pieces would not strike anyone in the way. Also, (as students) I have them yell "CLEAR!" to notify all concerned when starting a stone grinder. In any real shop, no-one would do this, but it's to get them to be aware of the fact that 1 out of a million starts will be an exploding wheel.
I had one of my Spanish speaking students write a note to place on the grinder: Do NOT EVER grind aluminum or other non-iron pieces on this grinder. Also in Spanish. I also explained WHY not to do this.
