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For me, grinders are the exception for the glove rule. I've had a couple of grinder "kisses" before that would have been much worse were it not for several millimetres of leather or neoprene glove.
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Apr 7, 2016 23:13
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Yeah, grinders don't have the same high torque/lower speed risks that a lot of the lose-the-gloves tools have. I didn't glove up for the bench grinder until a coarse wheel tool a nice deep bite out of my hand.
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Apr 7, 2016 23:24
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Adding to the angle grinder safety chat, don't forget to look where the sparks are flying. Or you'll end up setting your crotch on fire and have to cockpunch yourself to try and put them out.
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Apr 8, 2016 01:19
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I maintain the position that the angle grinder is the most dangerous tool in my shop. 10,000+ loving RPM... Only thing that spins that fast typically is a woodworking router, which has its own set of hazards, dose not compare to the angle grinder. This is an angle grinder scar on my right index finger. I got this while I worked at the scrap yard using a cutting wheel on the underside of a vehicle. I was wearing gloves... I agree with the sentiments that the gloves are a drat good idea when using angel grinders... I think my finger would have worse off without them. 
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Apr 8, 2016 01:34
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quote:I maintain the position that the angle grinder is the most dangerous tool in my shop. Yep. At the school I did my blacksmithing program at, the year before someone didn't tie their hair up and the wire-wheel on an angle grinder gobbled it up and then pulled the still-running tool into the side of his face for a couple of horrible seconds. Lotta blood, apparently.
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Apr 8, 2016 02:43
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 So I finally upgraded to a Nova G3 from a tiny weak lathe chuck that barely held anything longer than 5" I'm so excited to actually be able to turn bowls. I don't really know why I thought that original one would be any good.
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Apr 8, 2016 02:49
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Scale please (got no idea if I'm looking at miniatures of a 3 foot long box)
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Apr 8, 2016 02:58
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Coffee mug stain and thickness of cardboard relative to box dimensions suggests miniatures.
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Apr 8, 2016 03:04
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AbsentMindedWelder posted:I maintain the position that the angle grinder is the most dangerous tool in my shop. This, except for my case replace the wheel with a braided wire brush cup. All the hazards of a disc with the added fun of it throwing needles of steel into your chest, legs, arm, and face.
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Apr 8, 2016 03:50
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Man, at least angle grinder wirebrush wires don't have enough mass to do real damage when they take off- a smith I took a weekend course with had this huge mean wire-wheel on his buffer, bigger than any standard diameter I've seen and with coarse-rear end bristles that he exclusively used for effortlessly scouring any and all firescale off of things. He also didn't use it without full-body leathers and face-shield and with anyone else standing in the flung-wire blast zone.
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Apr 8, 2016 03:56
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"Angle grinder accident" is right up there with "lathe accident" on my list of things to not google image search.
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Apr 8, 2016 04:11
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Nthing the "use gloves with an angle grinder" opinion. I think if they got caught on the wheel then it would more likely rip the thing out of your hand and shut off than it would pull your hand into it. And the gloves protect you from sparks/exploding discs. I had a coworker who was using a 4.5" angle grinder like a dumbass (no guard or gloves) when it caught on something and exploded. He needed 18 stitches in his hand, but was lucky enough to escape with no permanent nerve damage. Later I was using a teeny little cutoff disc on a die grinder like a dumbass, and when it exploded I needed 6 stitches in my forehead. Now I use gloves/safety glasses always, a guard if it's at all possible, and a full face shield when I don't have a guard, or there's a chance of something ricocheting back at me. Ninja edit: using a 7" disc on a 4.5" angle grinder is double scary. Not only do you need to remove the guard, but bigger discs are rated for a lower RPM, which increases the likelihood of it exploding. EKDS5k fucked around with this message at 04:57 on Apr 8, 2016 |
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Apr 8, 2016 04:55
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I was using an angle grinder and it caused global warming.
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Apr 8, 2016 05:00
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I only wear thin nitrile gloves (exam gloves, mechanics gloves are too robust) with spinning things. Enough to keep the grease and flung wires away, not enough to rip your skin off. Even they are still a risk, though. Real gloves are insane. I've run two degloving calls, both caused by gloves vs machinery. Don't do it.
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Apr 8, 2016 05:21
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You'll want to be careful with ultrasonic cleaning if you have aluminum parts. Valve seats from my oxyacetylene torch turned out like this: TBH I don't think the pitting affects function here, but still... Why the hell not make those parts out of brass like everything else. Actually, it might probably not be safe after all. Aluminum should be anodized if it's to be in contact with oxygen. I think this old welding handle might be hosed since there are no spares, unless I wanna have brass replacements machined. Not worth it.... His Divine Shadow fucked around with this message at 06:39 on Apr 8, 2016 |
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Apr 8, 2016 06:33
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I don't think an appeal to majority rule is the right answer, exactly but... https://www.google.com/#q=wear+gloves+with+angle+grinder%3F A quick survey of the first few pages of results suggests that wearing gloves with an angle grinder is controversial. What I do not see is consistent advice about the shield, so I'll reiterate: you should always have the shield attached and in position to protect your hands, including from sparks and from anything else thrown by the tool, up to and including a shattered wheel. Naturally ear, eye, and perhaps face protection is warranted, and sometimes a filter or respirator is called for. Of course, the shield also provides some protection against a glove becoming entangled with the tool. If you are going to wear gloves, at least make sure the shield is keeping you from your grip possibly slipping forward, and also go over your glove and remove any strings, hanging bits, tears, tags, etc. that could get caught.
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Apr 8, 2016 07:10
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His Divine Shadow posted:You'll want to be careful with ultrasonic cleaning if you have aluminum parts. Valve seats from my oxyacetylene torch turned out like this: What liquid did you have in there?
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Apr 8, 2016 11:04
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AbsentMindedWelder posted:What liquid did you have in there? water, vinegar and dish soap, pretty mild stuff. It's the caviation process itself more likely that did it from what I found out.
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Apr 8, 2016 11:12
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EKDS5k posted:Nthing the "use gloves with an angle grinder" opinion. I think if they got caught on the wheel then it would more likely rip the thing out of your hand and shut off than it would pull your hand into it. And the gloves protect you from sparks/exploding discs. Oh yeah...I neglected to mention the wheel DID explode. Amazingly no damage too either of us although I got whacked by a big chunk of the wheel which kinda stung but my pants protected my skin enough to avoid injury. Her dad just shrugged and said that stuff happens. I think it had something to do with him using the concrete floor to stop the wheel whenever he turned off the grinder... That cannot be good for the wheel.
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Apr 8, 2016 12:56
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His Divine Shadow posted:water, vinegar and dish soap, pretty mild stuff. It's the caviation process itself more likely that did it from what I found out. The aluminium mill parts I've put in simple green in the ultrasonic cleaner have come out perfect.
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Apr 8, 2016 13:06
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Perhaps different types of aluminum, might be the anodizing, or what cleaning fluid you are using. Simple green is not available here.
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Apr 8, 2016 13:08
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AbsentMindedWelder posted:The aluminium mill parts I've put in simple green in the ultrasonic cleaner have come out perfect. Same with all the parts I've washed in acetone and isopropanol. Try not using acid on metals, that might help (aluminum is particularly susceptible to corrosion).
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Apr 8, 2016 13:10
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used vinegar and dish soap as it's been popular for use with brass cleaning, did not think of the aluminum parts being suspectible.
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Apr 8, 2016 13:16
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Crazyeyes posted:Oh yeah...I neglected to mention the wheel DID explode. Does her dad not like you or something?
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Apr 8, 2016 13:33
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I hate using angle grinders and avoid using them whenever possible. There is exactly one grinder here with the shield and handle still attached at my shop, and all my coworkers won't use it, preferring the unshielded, no goggles, no glove, one-handed operation that they do. They're going to maim themselves and I have no idea how they've gone this long without doing so. Unfortunately I've seen a lathe break an arm in person, so now I'm super paranoid about no gloves/long sleeves/hoodies around the lathes.
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Apr 8, 2016 14:22
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Ultrasonic cleaners are regarded as exceptionally gentle and are frequently used with softer gemstones and other materials that are far less resilient than aluminum. It's the acid what did the pitting- same thing that happens when you put foil on lasagna for a couple days and lil pinpricks get eaten through where sauce contacts the metal. 'generic acids' (as opposed to acid pickles like sodium bisulphite which work a little differently) can do a fine job of cleaning most metals- with close supervision so you can pull the part in between all the oxide and grime being eaten and the actual part being substantively corroded- but it's generally a pretty bad idea with reactive metals. Ambrose Burnside fucked around with this message at 14:40 on Apr 8, 2016 |
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Apr 8, 2016 14:37
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Well fortunately I got some more authorative advice on the seals and they should still be OK even if they don't look shiny and new anymore so the torch should be fine.
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Apr 8, 2016 15:10
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nostrata posted:Does her dad not like you or something? Nah he likes me. I think it was more a "look how much cooler and tougher than you I am by risking severe injury for no reason" thing. I just wanted to learn how to make stuff... 
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Apr 8, 2016 15:25
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When I was working on rail cars one of my co-workers had to go the hospital because he wasn't wearing safety glasses and got something from a grinder caught in his eye... do you think he learned his lesson and wore safety glasses the following day? No. I've came to realize many welders tend to have self-destructive personalties.
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Apr 8, 2016 15:54
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Also, gently caress you if you're using a grinder and pointing the sparks at a person, a box of oily rags (why is there a loving box of oily rags to begin with?!), or an oxy-acetylene line. You would loving think that even if you don't immediately realize the danger of what you'er doing, being outright told or having the danger manifested would be enough to get it through to someone. But no. So yeah, I absolutely believe that dude didn't wear safety goggles the next day. I like what I do, but I need to find a better place to work.
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Apr 8, 2016 15:57
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If you want to be a welder in a clean and safe environment, I recommend the food and dairy industry.
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Apr 8, 2016 15:59
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That time I saw a kid coil the hose for the cutting torch around him- and under the cinderblock he was cutting on- and proceed to try cutting some barstock up with the bare hose in the firing line of the torch 6 inches away.
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Apr 8, 2016 19:45
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I have a working lathe! (Ok, I'm not counting the POS HF 9x20 my brother has). Our machinist buddy made us a lovely delrin bushing on his $250k Okuma CNC lathe.      No video yet, it's noisy as heck with ~50 year old + belts, and it badly needs a new power switch- but I love it   Next up is making a rear chip pan (?) and mounting the new tool holder. Eventually I'll also make a tooling rack, but I'm way too happy that we can finally make chips again!
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Apr 8, 2016 19:51
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What's the wheel under the gearbox for? Also : totally jealous.
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Apr 8, 2016 22:05
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Variable speed! It controls the position of the reeves drive (aluminum discs above). Our issue was a frozen stuck bearing that caused the speed to be fixed. Not good for a lathe.
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Apr 9, 2016 00:38
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That is sweet. Mine still isn't together and I'm slacking on thread updates. But things are actually happening. Unfortunately it won't be nearly as exciting when I'm done as that beast.
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Apr 9, 2016 02:35
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Is that the continuously variable manual transmission mentioned earlier? Could that output enough torque to propel a vehicle?
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Apr 9, 2016 05:09
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mekilljoydammit posted:
Please come back with your progress. I've just got a central heating burner and am about the cast a foundry body to do the exact same thing with 3D printed lost was casting so I'd love to avoid any pitfalls I can. Did you work out the shrinkage % from the test cube?
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Apr 9, 2016 17:48
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I've just assumed leadership of the Western Canada Blacksmith Guild - southern Alberta chapter. Because I obviously didn't have enough to do already. 
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Apr 10, 2016 02:54
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Slung Blade posted:I've just assumed leadership of the Western Canada Blacksmith Guild - southern Alberta chapter. Congratulations. That sounds badass and I have no idea what that entails.
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Apr 10, 2016 04:48
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