Paulrbrown:
It was a 5" Klingspor, on a 5" air grinder. The disk broke into four pieces: three large chunks about one third the disk area each, and the fourth piece was the date stamp, located near the hole in the center.
I wanted to deburr an edge of a five inch pipe flange, so I held the flange flat on the table top with one hand, and pulled the trigger on the grinder. Within a second the disk fractured. My thumb was only 6" at most away from the disk.
I did a shock test using Klingspors and Orange Walters, to see how many times I could hit each disk with a ball pein hammer before they shattered.
Results I found were quite different. The Walter disk just got mis-shapen after 17 hits, it didn't actually shatter apart like the other disk did after just three hits.
Anyhow, any kind of grinding / cutting wheels can blow up, so I always check disks and wheels before use. There's too many stitch-up stories floating around for my liking
It was a 5" Klingspor, on a 5" air grinder. The disk broke into four pieces: three large chunks about one third the disk area each, and the fourth piece was the date stamp, located near the hole in the center.
I wanted to deburr an edge of a five inch pipe flange, so I held the flange flat on the table top with one hand, and pulled the trigger on the grinder. Within a second the disk fractured. My thumb was only 6" at most away from the disk.
I did a shock test using Klingspors and Orange Walters, to see how many times I could hit each disk with a ball pein hammer before they shattered.
Results I found were quite different. The Walter disk just got mis-shapen after 17 hits, it didn't actually shatter apart like the other disk did after just three hits.
Anyhow, any kind of grinding / cutting wheels can blow up, so I always check disks and wheels before use. There's too many stitch-up stories floating around for my liking

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