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Thread: What did you learn today?
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10th Sep 2015, 09:01 PM #481
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10th Sep 2015, 09:49 PM #482Banned
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- Jul 2011
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- Melbourne Australia
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Mate of mine that should have known better. Flipped a lathe on him self, 15 months ago. One of the handles pierced him. An hour pinned down, Ambo's, Police, Fire brigade actually used air bags to get it off him. He made the channel 9 news.
3 months off work.
Glad yours wasn't worse Graham.
Regards Phil.
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10th Sep 2015, 09:59 PM #483Most Valued Member
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10th Sep 2015, 10:09 PM #484Pink 10EE owner
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- Aug 2008
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- near Rockhampton
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I was not going to mention this, but a few weeks ago when shifting my metal working equipment I nearly had a nasty accident and nearly tipped a mill over..
It was the one I fitted with the bridgeport head and it weighs 2.5 tonne or so.. Had it on the loader, loader brakes would not hold it as the front wheels went downwards into a ditch just before the concrete.. The mill was above the concrete, then as the wheels went down, it went down as well, and went on the concrete, then the brakes failing meant the loader kept going and tried to tip the mill over, and a sling fell off the forks as well.. How it never tipped over is beyond me, not as top heavy as I thought.. No damage done other then a bent speed adjustment shaft on the head where a fork hit it...
Working in a hurry, by yourself without thinking things through is a recipe for disaster..Gold, the colour of choice for the discerning person.
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10th Sep 2015, 10:26 PM #485Most Valued Member
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- Jun 2011
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- Australia east coast
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Absolutely. I dropped a 3m x 1.8m sheet of steel free from its plate clamp one time because I was tired & didn't notice there was a loose bight of chain that unloaded the pressure on the clamp as I was lowering away.
After I looked at my feet & noticed the toes were all there etc, I secured the plate & quit for the day.
Fortunately it only had 100mm to drop as I don't raise anything more than I have to. Hell of a noise though.
PDW
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10th Sep 2015, 11:00 PM #486Most Valued Member
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- May 2011
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- Murray Bridge S Aust.
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- 71
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100 mm drop is still enough to take off a toe or five, heard of blokes losing all the toes when something ran or landed on toe cap boots, curling over and shearing off all the toes, I hated plate work.
Kryn
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11th Sep 2015, 07:18 AM #487Diamond Member
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- Oct 2011
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- Sydney, NSW
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- 1,249
Hi,
I'm moving next week to our new residence. So I have to move my lathe (Hercus 260), mill (Hercus again), Douglas shaper, Sterling drill press and a few other heavy shed related items. Will be borrowing a heavy duty engine hoist from work. Will have to do it over a couple of days.
Not looking forward to it but should be the last time I have to move it all. It will be round 2 with the shaper though.
Ben.
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14th Sep 2015, 11:31 AM #488Banned
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- Aug 2015
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- QLD
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- 735
What did I learn today...
Continues...
"...their coal power capacity UTILISATION is less than 54% and falling..."
I see China has recently commissioned some very large hydro projects though can find nothing about that 54% coal "utilisation" figure. A reference perhaps ?
"...Why they are building more coal power stions than they need and use is a mystery..."
I suspect they need the reliable power NEAR the factories. The Chinese power grid has its problems.
"...One imagines that they can't make enough renewable power to match their needs..."
Yes. Then there's the economy destroying cost to consider. The Chinese aren't that silly as to install any 'green' power that ain't paid for by the West...
Continues...
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15th Sep 2015, 09:37 AM #489Diamond Member
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- Feb 2013
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- Laidley, SE Qld
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- 1,039
Not all Harbor Freight Tools stores sell machine tools
I had a spare day in Denver and a few kg of luggage allowance to fill so l found a Harbor Freight Tools, hoping to buy adjustable grinding tables for 8" bench grinders. The shop was very busy, people everywhere, they were having a Red Tag Sale which is apparently a Good Thing.
The one I visited had just about every tool you can think of for every trade but no machine tools. Thinking about it there are 6 HFs in the Denver area for a population of 3 million so I guess only one of those 6 carries the good stuff.
I bought a Taiwanese 9 piece metric allen key socket set for US$25 which I do need, and a few other odds and sods some of which I probably don't need but they seemed very cheap, kid in a lolly shop and all that.
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30th Oct 2015, 11:13 PM #490Golden Member
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- Nov 2010
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- Gippsland Victoria
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- 733
Cutting a morse taper socket after cutting the plug can be confusing.
Left the compound on the same angle and didnt realise how far I had to open up the workpiece with a drill before I could get my boring bar into play.
Then I wondered why the plug wouldnt fit and realised that the fat end was inside the chuck and I was trying to put the plug in the thin end and of course it wouldnt go.
Got it all sorted after I rebooted my brain and very very chuffed - no wiggle.
Am always kind of amazed when things actually work properly - .
Next learning is gonna be a wormscrew.
I often see hobbyists use diy wormscrews to drive rotary tables.
I haven't seem many people use diy wormscrews to to a speed reduction on a motor.
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30th Oct 2015, 11:30 PM #491Most Valued Member
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- May 2011
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- Murray Bridge S Aust.
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On some of the early model cars the steering box could be used for a right angled drive. Can't remember the ratios though.
Kryn
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5th Nov 2015, 09:07 PM #492Golden Member
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- Nov 2010
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- Gippsland Victoria
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- 733
Slitting saw from 3.5" TC wood blade ?
It seems to be possible to use a woodwork 3.5" tungsten tipped saw blade as a slitting saw.
I cut the MT3 on the lathe to make the saw-holder. The saw blade came from a small Aldi wood saw that I got for $20 during a clearout sale.
Ran the mill at 200 rpm and managed to cut a slit in 25mm mild steel square bar. Very tidy compared to my usual hacksaw efforts.
I've noticed this use of wood saws is discussed in various forums on the net and falls into the category of "You shouldn't do it, but it seems to work, and you must not promote the idea in any books or training manuals"
What do other people think - stupid and dangerous get a proper one ?
Bill
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5th Nov 2015, 09:45 PM #493Most Valued Member
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- Aug 2008
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- Charlestown NSW
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6th Nov 2015, 03:34 AM #494
I've tried this too but didn't want to be first to admit it
However, I came to the conclusion that I would change the rake angle of the teeth when I have my T&C grinder set up with a diamond wheel one day. The rake on my (and yours) saw blade it too steep. It is a bit closer for aluminium but not really for steel.
Those smaller blades seem to have reasonably sized tungsten carbide tips which allow a bit of regrinding to correct the rake. It only needs to be done close to the tip, not the whole tooth. You sort of get a secondary rake angle ....Cheers, Joe
retired - less energy, more time to contemplate projects and more shed time....
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6th Nov 2015, 04:05 AM #495
Hi Bill,
I've been using carbide wood bits and saw blades in this fashion for a long time now. As Joe said, for steel the tip angles are not optimum, though for aluminium and brass they work well. As far a speeds are concerned its a matter of common sense and experience. You soon learn when a machine or tool isn't happy Coolant makes a difference as well particularly on gummy material.Best Regards:
Baron J.