What did you cut and what did you do wrong to happen this ?
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- Thread starter WillSwift
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I've had bits fly off the wheel before but never a full on explosion like that. But while that was a unique experience in itself, I use that grinder so often that I couldn't tell you what I was cutting. It was probably micarta though.
I have been using angle grinder since I was ten. Thousands of discs have been used. Pipes, solid iron, aluminum, bronze, wood, plastic .. I cut everything . I never broke the disc or exploded ...There are some rule about using it ....follow that and you will have no problem .Perhaps concentrating on what you are doing is the most important rule .
And watch sparks .....................you want them only on edge
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I had a real fun thing happen with an angle grinder once. For some reason I thought it was a good idea to cut a two foot long,half inch piece off a thin piece of sheet metal with the angle grinder. All of the sudden"BAM!" I had the whole jagged strip wrapped TIGHTLY around my left wrist! It happened so fast I didn't see it!
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That sounds terrifying. I vaguely recall hearing a story of someone inexperienced with a drill press drilling metal, and (thinking it would work like when drilling wood or plastic) trying to use his fingers to brush the debris off the bit as it was turning, only to get his hand yanked into the machine and finger cut up. Sounds like a similar idea, and one I would equally want to avoid.
cutting thin piece of sheet metal is real challenge , the biggest problem is the vibration it creates and easily tightens the disk between two part because the cut off part bends. If I explain right what I mean 
PEU
Gaucho Knifemaker
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- Aug 6, 2006
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Glad to read that you are OK! Never had an explosion like that, only minor problems, but once I changed to Pferd 1mm cutting discs never again had a single problematic event.
Pablo
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- Jan 1, 2011
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- 196
Working on a new design:
Trimming stock width to 1.520” to fit the fixture.
Side 1:
Yup, that’s a screw that I plunged a chamfer mill into. Forgot to take the screw out before that operation. Gotta love cnc.
And hand sanding to get the machine marks out and get a clean 400 grit finish. I like hand sanding machined knives, helps keep the lines and adds some hand work to the knife.
Trimming stock width to 1.520” to fit the fixture.
Side 1:
Yup, that’s a screw that I plunged a chamfer mill into. Forgot to take the screw out before that operation. Gotta love cnc.
And hand sanding to get the machine marks out and get a clean 400 grit finish. I like hand sanding machined knives, helps keep the lines and adds some hand work to the knife.
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First kitchen knife, wa handle, hidden tang, longest, first AEB-L. Quite a bit of firsts. Just need to make the saya, etch my mark and sharpen it and it’s ready. It’s for my best friend for his wedding at the end of the month. Gabon ebony, 416 SS, stabilized Bocote for the handle
Richard338
Gold Member
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- May 3, 2005
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Looks great I'm sure they'll love it.
I can't tell for sure from the photos, but it might be a little thick behind the edge. I've been steadily grinding mine thinner and thinner and they perform better and better (as long as you don't push it too far).
I can't tell for sure from the photos, but it might be a little thick behind the edge. I've been steadily grinding mine thinner and thinner and they perform better and better (as long as you don't push it too far).
I think it slightly is too. I still have to sharpen it but being aeb-l and it trying to warp on me already I was worried about going much thinner. Also I had made the handle already and didn’t want to thin it too much and it have a gap in the handle. But next one will be thinner for sure. I have never actually held a Japanese style knife so it was all based on pictures and videos. But it’s already thinner than the chef (8.5”) and 2 Santoku’s I have (8” and 6”) I have of my henkels so I feel it’ll still work great even though I may have left some performance on the table.
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- Oct 10, 2018
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It's been a long time coming. My homebrew surface grinding attachment is nearly complete, and for a fraction of the cost of a bought SGA (~$360 vs $1000-1500). I had a lot of fun building this one, but I don't know if I'd ever want to drill so many holes in aluminum again. I found it to be an odd material, machining-wise. The drill bits have to be brand new or they will only melt the aluminum. Drills like butter with a sharp bit until you run into a hard spot that squeals and you gotta add some more oil to keep going.
That is not hard spot in Aluminium , there is no such thing in that material .Al wants to stick on drill bits ..........Drill little , clean tip of drill bits ...drill-clean ....Obviously that is some soft aluminium you drill in ..In some Al alloys drilling hole is pleasure ........
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- Oct 10, 2018
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It's 6061. Hard spot probably isn't the right wording, it's just what I was feeling.
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- Jun 29, 2014
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Finished this one up recently, and just got a batch of stainless knives back from HT that I've been looking forward to for a while. Making my first knife with Damasteel and really looking forward to seeing how it turns out!
