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tense moments in the shop

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  • bborr01
    replied
    This didn't happen in my shop but in a close friends shop. He is pretty safety concious but sometimes things slip by.

    He has a car hoist and does a fair amount of car repairs for friends and family. When he does brake work he would put the oil drain catch cart under and wash away with brake clean.

    One day he was welding on an exhaust system and the oil drain cart was too close. He told me that in about a second flat he had about 8 gallons of drain oil all over the floor. The flames went out almost instantly but he had a real mess to clean up.

    Brian

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  • brian Rupnow
    replied
    Tense times indeed!! I have built many small/model gas engines, and since the desk in my design office is so conveniently placed just outside my machine shop door, it had often been my "test bench" for first start up of these small engines. Not anymore! Story involves an engine that wouldn't start when everything said it should, a severely flooded engine, and spark testing a sparkplug by unscrewing it from the cylinder head and laying it on the engine block to check for spark when turning the engine over. It HAD spark--Lots OF SPARK. Thank God for handily placed fire extinguishers and quick reflexes. Now I do my start up testing out in the main garage, away from all things flammable!!!

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  • boslab
    replied
    With respect to the original post regarding shrink fitting, once you heat a lump of metal and it shrinks it's final size is less than the size it was before heating (provided you exceed certain pints on the equilibrium diagram for that alloy, steel being an alloy)
    This rather irritating or useful fact was known way back, wrought iron is particularly susceptible to permanent shrink and was as far as I can find used as a 'fix' for over length things and oversize things, I found it's earliest reference in an old book called a practical treatise on heat by I think Thomas black, it described getting cylinder rods, cannon bores and things to fit if they were oversize by heat quench cycles, I didn't beleive it but after a bit of experimenting found it was true, there's not a lot of permanent shrink per cycle but it is there, just an interesting thing it thought.
    Looking at the mill with the giant cutter amusing, might need a bigger one, mill that is, what do pilots say, pushing the envelope ( I didn't know you delivered mail I said to my mate, a pilot, he weren't impressed)
    Big lumps of expensive tool steel must be scary, I've heard tales, but to be honest I've seen big car press tools with loads of mods by way of plugs and inserts so I suppose nothing is irretrievable, tig welding certainly helped fix one or two dies I was involved with!
    I saw some giant double helix gears, about 10' diameter on a scrap pile, reason unknown but the teeth were only half formed, someone blundered as they say, teeth to the left of me teeth to the right and none right!
    I'm glad I only do rough stuff for myself, no stress
    Mark

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  • jasnooks
    replied
    Originally posted by rklopp View Post
    Good grief, look at that monstrous endmill in a poor R-8 spindle! Tell me that didn't chatter ten ways to Tuesday. Is this a pro shop?
    1" dia, about 4" long. He was just opening up a slot, making clearance for hydraulic lines. Nothing fussy, but yeah there was quite a bit of barking going on, lol.
    Yes, it's a pro shop, and no, this isn't the norm for our place, but sometimes we have to do whatever it takes to get the job done.

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  • jasnooks
    replied
    Originally posted by flylo View Post
    Is the yellow stripe on the mill the tip over mark?
    No, that's just marking the center of table travel. I'm not sure where the tip over mark is, luckily he never got that far

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  • jasnooks
    replied
    Originally posted by A.K. Boomer View Post
    I bet that old power feed was barking at him a bit lol
    Power feed doesn't work, manual feed only. And from what he said, it was a bear to crank.

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  • ironmonger
    replied
    <<snip>>

    I check everything over and over each time I light up my little Oxy - Propane brazing torch. One valve opens clockwise, the other counter clockwise. I can't help but imagine what will happen when I turn the wrong one the wrong way and cause it to burn back into the hoses.

    <<snip>>
    Dan[/QUOTE]

    I saw this demo at the FABTEC show in Chicago a few years ago.

    https://youtu.be/pWe84DyPIsg

    They made a believer out of me. I was kind of cavalier regarding there use before the demo... not any more

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  • toolmaker76
    replied
    In the 80's I did wire edm on some mold cavity parts that were made by a special process. The raw material was worth $30,000 before I ever touched it, and they had a finished surface that could NOT be scratched or damaged, but it was the reference point for everything else, which resembled a rough casting.

    Everything had a VERY tight tolerance. Multiple cuts, each of which had to be right. A thousand ways to mess it up. First few I did were successful, so then the customer asked for me by name. Never scrapped any of them, but I would stress over them to the point that my stomach hurt and my nerves were shot.

    I left that company 25 years ago, definitely did not miss those parts, and don't think I've ever done anything as stressful since!

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  • dneufell
    replied
    Hey Flylo.....

    That was real funny.....as the kids say lol

    Dean

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  • danlb
    replied
    Those tense moments happen frequently around my shop. I shift from one hobby to the next as the mood hits. A few tense moments that come to mind...

    I check everything over and over each time I light up my little Oxy - Propane brazing torch. One valve opens clockwise, the other counter clockwise. I can't help but imagine what will happen when I turn the wrong one the wrong way and cause it to burn back into the hoses.

    Every time I open the valve on the 2300 PSI argon tank for welding I recall the cautions about keeping your hand away from the top of the valve... Just in case the valve blows out and shoots through the roof.

    Some tools are used infrequently, so they tend to have the higher pucker factor. The longer between uses, the better chance that you forget to do something right. My woodworking tools fall in that category. When I chuck a block of wood (in my wood lathe) I always feel anxious for the first minute while it's out of balance. Then there's the table saws and skill saws and routers. All of them are spinning sharp things wicked fast.

    Electrical hookups are much less exciting. I have the tools to check the connections, so I virtually never have a concern about an electrical fire from mis-wiring.

    Dan

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  • flylo
    replied
    Worsed I've had is the forklift LP diaphram went bad & as propane goes down it filled the engine & when I hit the key it didn't start so I opened the hood hit the key & the distributor cap jumped & 1/2 the shop lit up with 3' high flames about a 40' square, burned all the hair off my legs, as started several thing on fire. Thank God I had 2 extinquishers close by. Now I turn off the tank even it's only off 5 minutes. I had to put the dist cap back on but no other damage except the fire ext mess.

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  • PStechPaul
    replied
    Drink lots of water and make sure the zipper on your fly works quick and easy.

    On second thought, for an electrical fire, maybe not so much!

    A good fused disconnect is good to have in case things go awry. The large handle is easier to operate than a circuit breaker, and the steel enclosure provides better protection.

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  • spongerich
    replied
    Originally posted by darryl View Post
    I'm sure we've all had tense moments- times when you're about to do something and nervous about the outcome- like plugging in the machine you've just rewired and hoping it doesn't put on a free smoke show.
    I always grab a fire extinguisher and keep it right next to me whenever I plug in a new machine or one that's had wiring work recently done.

    Haven't needed it yet, but my shop is in my 100 year old barn, so I'm like The Scarecrow when it comes to the possibility of fire. I have fire extinguishers mounted all over the shop, but I like to have one right there whenever I think there's a possibility I might need it. Maybe I should get a little one and make a belt hook for it

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  • George Bulliss
    replied
    Done similar plenty of times without a problem. You won't rough with it, but for finishing a pocket wall (a few thou.) it works.

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  • rklopp
    replied
    Originally posted by jasnooks View Post
    My buddy at work had this setup last week. He didn't seem to nervous, but i was waiting for it to flip over. That's a lot of steel hanging off to the side. And, no the Bridgeport isn't bolted to the floor.
    Good grief, look at that monstrous endmill in a poor R-8 spindle! Tell me that didn't chatter ten ways to Tuesday. Is this a pro shop?

    Leave a comment:

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