Dangerous Practices

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Dangerous Practices

Home Forums Workshop Techniques Dangerous Practices

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  • #55788
    Ian S C
    Participant
      @iansc
      John, for those little center punches, old chain saw files are what I use, you can get them from 1/8″/3mm to 1/4″/6mm in steps of 1/16″, very handy files new or used. Ian S C
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      #55793
      JasonB
      Moderator
        @jasonb
        Or long series center drill will do the same thing, you can get them upto 6″ long.
         
        Jason
        #55817
        Sub Mandrel
        Participant
          @submandrel
          I’ve just deleted a huge, long , boring post
           
          Suffice to say I’m fed up of the ‘elf and safety’ moaning.
           
          We all have a responsibility to eachother to ffer advice taht is soundm, and to bear in mind that what is written here or ME will be seen as teh advice of the experienced and followed  
           by those who are less experienced or less competenet to realise where things are going wrong.
           
          I am someone who for many reasons feels they are competent to work with mains electricity. The weekend before last I spent several minutes immobilised one the floor after touching wires I thought I had isolated*.
           
          We can all be blase, but remember the really unluck ones aren’t here to brag…
           
          Neil
           
          *my wife thought it was hilarious – she said I can’t have been that badly affected as I was swearing so much.
           
           
          #55939
          Chris Trice
          Participant
            @christrice43267
            For what it’s worth, I part off with tailstock support all the time but never all the way through. I part off near the chuck but leave a sufficiently stiff core of metal so I can stop the lathe, remove the tail centre and then hacksaw through the final bit. You then just face off as normal. Never had a piece come adrift yet even in the occasional jam up. In fact I’d argue that being wary of a particular technique makes you less likely to have a mishap because you take things carefully. It’s non-thinking overconfidence that causes accidents.
             
            As far as holding material in a four jaw diagonally is concerned, it’s a measured risk assessment. It depends entirely on the degree of cutting force and the direction it comes from versus the amount of grip the chuck is applying as to whether the piece will shift. Enough force in the right direction will always ovecome a friction grip but how likely is it that those forces will reach that figure? A heavy milling cut will pull an end mill out of a taper collet if the gripping force is not sufficient but no one insists the same cutters must be threaded and fitted in a non-slip Autolock chuck. Nothing in life is 100% risk free but as long as common sense and balanced reasoning used, where’s the problem? Keep the grip firm and the cutting forces light and you’re unlikely to have any problems. 
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