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Thread: What did you learn today?
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12th July 2014, 09:50 PM #391Philomath in training
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I learnt that when boring Al, watch out for the built up edge as it is enough to take the bore a few thou oversize (damn!)
Michael
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12th July 2014 09:50 PM # ADSGoogle Adsense Advertisement
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13th July 2014, 10:31 PM #392GOLD MEMBER
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14th July 2014, 07:53 AM #393Philomath in training
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Pretty sure it was. Sequence of events was
Bored hole (several spring cuts) - measure bore - work out amount of feed required - dial in feed - bore hole - measure again - exclaim because the hole is 2 thou over size - notice build up on tip - exclaim again.
Made usable with bearing glue but I would have liked a neater fit (with the diameters I'm working with that means almost size for size). I may have to remake if things are too out of wack.
Michael
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28th April 2015, 10:29 AM #394SENIOR MEMBER
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Accidentally learned how to cut a left hand internal thread
Decided it was easier for me to work from headstock towards tailstock when cutting an internal thread.
Was getting quite peeved when testing the threaded bar in the hole, couldn't figure out why it wouldn't even try to go in, checked all depths and diameters, shaved a smidge off and no change. That moment when the two threads fit together has become quite satisfying and relatively easy to achieve over the last week, so I was very puzzled
Looking at the workpiece - flash of understanding inside my head - realised I had cut an internal left hand thread. Doh ? Although I now reckon left hand threads will always be easier to cut than RH threads because you always end up coming off of or out of the workpiece.
Thoroughly enjoying learning how to cut threads on lathe - quite amazed at how everything works and fits together - was thinking "Gosh I'm good" but then realised that its the lathe that is accurate rather than me.
Have duplicated my lathe headstock thread as I figured that would be a handy thing to have as a test gauge - was absolutely gobsmacked when it worked and fitted perfectly into the chucks - although the long term aim was to be able to do these sort of things I was always a bit daunted by the thought of threadcutting.
Considered building a jig to cut perfect 60 degree tool and then thought "no stuff it, wasting too much time, just do it" - and it worked ! However some sort of jig might be easier. Its been added to the list of things to make.
I guess I'm lucky it was a test piece and not the real job, I'd be stuck with a left hand threaded faceplate.
Bill
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28th April 2015, 05:03 PM #395Senior Member
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- gold coast
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I have to congratulate you , Bill.
Great minds think alike.
Only a week ago I set up to cut my first thread, after several weeks of reading/ Utube etc and a some steep learning curve lathe operational education.
The thread form looked good, the pitch gauge settled on delightfully, BUT the thread was left hand.
How was I to know that the 'standard' way to cut a thread was towards the chuck--not towards the tailstock.
After all, I do most of my turning that way--cos without any knowledge except observation--I figured that there was more chance of crashing the carriage into the chuck, if I power fed towards the chuck and not the other way.
A timely lesson yesterday from my mate Daryl, has put me on the one 'twue way",--- and not before time.
regards
Brian
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28th April 2015, 06:17 PM #396I break stuff...
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I was reminded yesterday that when flaring steel tubing (clutch pipe in this case), it generally works much better when you put the tube nut on the pipe BEFORE you flare it.....
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29th April 2015, 10:07 PM #397
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29th April 2015, 10:51 PM #398GOLD MEMBER
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30th April 2015, 01:13 AM #399
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30th April 2015, 01:27 AM #400
Ah yes. Experience is a wonderful thing!
It allows you to recognise mistakes immediately - when you make the AGAIN....Cheers,
Joe
9"thicknesser/planer, 12" bench saw, 2Hp Dusty, 5/8" Drill press, 10" Makita drop saw, 2Hp Makita outer, the usual power tools and carpentry hand tools...
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30th April 2015, 04:07 PM #401GOLD MEMBER
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30th April 2015, 06:52 PM #402
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30th April 2015, 08:21 PM #403GOLD MEMBER
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I'm worried for the nut that holds the nut, to make the same mistake within 5 minutes, wrong nut then right nut back to front.
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1st May 2015, 09:25 AM #404GOLD MEMBER
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1st May 2015, 08:35 PM #405
Yes. You could say that. Saw an incident on the road today that was too close for comfort. Very large tractor blocking almost the whole lane as well as the side of the road. A ute was right behind it. We had a B-Double in front as we approached on a straight. The double pulled out to go around. Plenty of space until the ute decided to pull out without looking. I was expecting the inevitable but I think that nut was saved by the quick reflexes of the double driver. He swung almost completely off the road on the other side. Hard and fast. A very tricky move. This is a 2 lane road, not very wide and with Red Gums all along the sides just waiting. I was staying way back as I usually do.
Dean
Edit. I learnt that my habit of sitting way back when driving is a damn good one.
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