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Thread: What did you learn today?
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9th May 2017, 07:29 PM #646Senior Member
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does not need a spark mate , an oil soaked rag will self combust on its own no problems . heats up like a compost heap will ,only to the point of catching fire . not saying it never got a spark because it may of , all i am saying is that it can spontaneously combust on the lathe or in a bin or anywhere , i am allways very careful of oil soaked rags and or saw dust having seen it happen with rags soaked in linseed oil and saw dust too on building sites .
johno
'If the enemy is in range, so are you.'
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9th May 2017, 09:15 PM #647Most Valued Member
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SWMBO decided that the smoke detector in the bedroom needed replacing as it wouldn't stop squealing, (no smoke though) trying to remove the battery, she broke the terminal board, rendering it useless for in the house.
Thinking of putting it in the shed, as I've had several situations, mainly smoldering rags or paper toweling. Anyone put one in their shed for an early warning of fire????
KrynTo grow old is mandatory, growing up is optional.
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9th May 2017, 09:23 PM #648Philomath in training
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I try to follow a fire watch procedure and finish any hotwork 1/2 hour before leaving the shed. Usually with packing up and so on, that's not too bad.
About the only fire I've ever had in the shed was when I set myself on fire with sparks from an angle grinder.
Michael
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9th May 2017, 09:42 PM #649Member: Blue and white apron brigade
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I have a 2 dry powder extinguishers (2.3 and 1 kg) , a large CO2 extinguisher, plus a fire blanket and a smoke alarm. For the mains gas forge there is a CO/CO2/Gas alarm. I've set a buffing wheel alight twice and myself a few times with an angle grinder. I've also had a small electrical fire.
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9th May 2017, 10:09 PM #650Diamond Member
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Thanks for posting about your misadventure there Gavin, a very salutary lesson for us all. I am so pleased that the damage appears minimal, and that you are not looking at a total loss.
Perhaps smoke detectors would be part of the solution, but I can see that they could be difficult to incorporate, unless you had a vacuum extraction system which could extract welding smoke for example which would cause false alarms (no pun intended).
Obviously fire detection and fire fighting capacity need to be taken seriously, and it is interesting to see the approach others have taken to address the situation.
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10th May 2017, 12:16 AM #651Member: Blue and white apron brigade
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10th May 2017, 12:26 AM #652
It's good to read the responses to my post.
What got to me in the incident was how quickly the crisis evolved in spite of all the care I have always taken and how helpless you feel after the event - despite handling the extinguishing of the fire within a matter of seconds of finding it. Fire is one of those things that you are never really in control of it would seem.
Like Michael G, I considered myself to be fastidious about hot-work checking and always stayed in the workshop and check for an hour after shutting down the welders - to the extent that before leaving I turn all the lights off and shut all the doors to check for signs of glowing anywhere - I always thought that was overkill but did it anyway.
Despite all that it seems that the stop-gap measure of leaving the rag (an old towel in fact) in the chip tray to soak up the oil was my undoing and a wake up call. Complacency it seems is not an option. I was in two minds about posting the event as I felt rather foolish that it had happened but I did so in the end in the hope that others might learn from my experience.
Since the fire I've taken measures to protect the machinery side of the workshop from the welding table area, replaced the spent extinguisher and we are looking at some means of raising an alarm in the house if I get into trouble out in the workshop - not quite sure how to approach the latter though.
Smoke detection could be difficult as the welding and grinding presumably would trigger them - luckily the President of our Superkart club runs a fire prevention company, I'll pick his brains for ideas.
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11th May 2017, 03:19 PM #653Most Valued Member
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11th May 2017, 05:31 PM #654Banned
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I must just be lucky, I have never had a fire in my workshop, amazing really because I follow absolutely no safety precautions in that regard other than trying to keep it clutter free, which I mostly fail at. I generally have oil soaked rags and paper lying around, even when welding, just lucky I guess. Not in other regards though: lost count of the number of steel splinters in my eye and angle grinder cuts to the leg, I even reshaped my finger/bone once with a router bit.
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18th May 2017, 10:13 AM #655Member: Blue and white apron brigade
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Last week I started to upgrade the blade guard on my table saw which is currently suspended from a roof truss in the middle of my shed.
The guard just above the saw is supported by a 1.25" diameter steel pipe with an adjustable angle elbow roughly in the middle. The height above the saw table is set by adjusting the elbow angle, and to help get the location right above the blade there's a short (80 mm long) plain angled (30º from vertical) steel bracket made of a piece of 25 x 5 mm steel strap holding the pipe/elbow to the truss.
One problem with the old set up was the old bracket was just too flexible so the guard moved more than I liked so I decided to make one out of 40 x 12mm strap, but how to put a 30º bend in that with no oxy on hand, and a press not really up to bending 12mm strap.
I thought about cutting and then welding two pieces together but then I thought of cutting a narrow "V" half way through the strap, bending to correct angle with my small press and then welding up the V. It worked a treat!
There's only a few kgs of weight in the whole guard so it doesn't need to be that strong.
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18th May 2017, 11:15 AM #656Banned
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Either buy one of these or take your 40x12 to a shop that has one. Expensive for just one bend, but since I bought one couple of weeks ago it's had plenty of use. Of course if you're a brand snob you can pay another $900 on top and buy a Bramley.
https://www.paramountbrowns.com.au/p...der-100-x-8mm/
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19th May 2017, 12:09 PM #657Member: Blue and white apron brigade
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Pics, as requested, of the bracket.
Nothing much to see really.
Bracket1.jpg
Bracket2.jpg
Full details about the TS OH guard posted here : Ducting update. - Page 6
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19th May 2017, 12:37 PM #658
Observation is very important. I am adding a hydraulic downfeed controller to my horizontal bandsaw as mentioned in a thread at the end of last year. I needed 2 longer 5/16" bolts to mount a bracket to a casting witch had blind holes. I found 2bolts and proceeded to screw them in. One seemed a bit different and when I screwed it in by hand it did not go in straight. After a bit of fiddling I took it out and had a real good look at it. I had already checked the pitch against the original bolts.
It was a double start thread. On a 5/16" x 1 1/4" bolt. Lucky I did not attempt to force it in.
Dean
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19th May 2017, 08:46 PM #659Most Valued Member
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What was there that required for it to be a reasonably quick release????? That's the only reason that I can think of for a double start thread!!!
KrynTo grow old is mandatory, growing up is optional.
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19th May 2017, 10:21 PM #660
It was obviously made like that for a reason, but it gets you thinking about what the reason was.
Dean