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  1. #211
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    Quote Originally Posted by Ueee View Post
    1mm doc 25mm high.
    2.5mm?

    Better the wheel than anything else I guess
    Stuart

  2. #212
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    Ueee is offline Blacksmith, Cabinetmaker, Machinist, Messmaker
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    Quote Originally Posted by Stustoys View Post
    2.5mm?

    Better the wheel than anything else I guess
    Stuart
    1mm sideways on a shoulder 25mm high. Waaaaay to much at ordinary feed speeds.
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

  3. #213
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    You said "Maybe .100". ", then 1mm. then I got confused.

  4. #214
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    Ueee is offline Blacksmith, Cabinetmaker, Machinist, Messmaker
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    Yep it confused me re-reading it.....that's ok, its one of my many skills
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

  5. #215
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    Things happen fast when everything goes pear shaped.

    Rob
    The worst that can happen is you will fail.
    But at least you tried.



  6. #216
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    Ewan, have you checked the spindle for runout?

  7. #217
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    Ueee is offline Blacksmith, Cabinetmaker, Machinist, Messmaker
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    Quote Originally Posted by Bryan View Post
    Ewan, have you checked the spindle for runout?
    First thing i did. Not even a twitch on a 10th indicator. Phew.....

    I don't plan on doing it again either.....its by far the worst thing to have happen to me i reckon. The shaper vice bump was one thing, but this was in a different ballpark. I'm looking at how i can put some adjustable stops on the machine, shouldn't be too hard.
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

  8. #218
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    Quote Originally Posted by Ueee View Post
    I learnt a few things yesterday.
    One is that despite the low low speeds that the metal bansaw blade runs if the blade breaks it can still snake its way out of the guard and bite your unsuspecting hand.

    I also learnt that hand feeding to a shoulder on the surface finder is more reliable than trusting the power feed. I now have a wheel that turned itself into 4 wedges inside the guard. Damn lucky the guard captured all of the big bits.

    Cheers,
    Ew

    Ohh ouch,

    On the shoulder grinding, it is a real tricky one to get right with power feed, at best you will load up the wheel and round over the corner of the wheel going in too slow or worst explode a wheel.

    I rough it close, dress, finish to shoulder with manual feed and then power feed out from the shoulder with a slow crossfeed to spark out, limit switch is set well before the shoulder. This is one reason why I want to put a servo on the cross feed.

  9. #219
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    Glad you weren't hurt Ewan. You do read some horror stories about wheel failures. Was the guard damaged at all? I'm guessing it's a heavy cast one. I will need to come up with some guarding for the Orphan TC but I'm not sure how to go about it. Maybe weld something up from heavy pipe. Anyone got some, say 6" pipe or column they want to sell me a piece of?

  10. #220
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    Quote Originally Posted by Bryan View Post
    Glad you weren't hurt Ewan. You do read some horror stories about wheel failures. Was the guard damaged at all? I'm guessing it's a heavy cast one. I will need to come up with some guarding for the Orphan TC but I'm not sure how to go about it. Maybe weld something up from heavy pipe. Anyone got some, say 6" pipe or column they want to sell me a piece of?
    I do Bryan.
    Yours if you want it. Schedule 40.

    Phil

  11. #221
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    Thanks Phil I will send you an email.

  12. #222
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    Quote Originally Posted by Michael G View Post
    The difference between success and failure when cutting threads can be measured in thous.

    Attachment 281618

    I was intending to reduce the DOC for the next pass - and then the tool grabbed. TIR is 0.275"
    Bugger

    Michael
    So close Michael..... I can just make out the point where it decided to bite too!

    Simon
    Girl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.

  13. #223
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    Quote Originally Posted by Bryan View Post
    Glad you weren't hurt Ewan. You do read some horror stories about wheel failures. Was the guard damaged at all? I'm guessing it's a heavy cast one. I will need to come up with some guarding for the Orphan TC but I'm not sure how to go about it. Maybe weld something up from heavy pipe. Anyone got some, say 6" pipe or column they want to sell me a piece of?
    Its heavy enough Bryan, i have even tested it.....
    Its cast ally, about 1/8" thick i guess, but there are several stronger points, the hinge for the door and where a vacuum unit would fit. The rear plate is 1/4" with the cast bits welded on.

    Ew
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

  14. #224
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    Not machine related but what i did learn today was that when reversing, a distance of 300mm can be the difference between firm ground and getting stuck....
    Attached Images Attached Images
    Gold, the colour of choice for the discerning person.

  15. #225
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    Default Todays learnings

    Learned how to

    Turn a 3" hexagonalbar down to a cylinder - was very tentative at first but lathe didnt bite me - got more adventurous towards the chuck end

    Use center drills and tailstock for support

    Split 25mm off the end of cylinder - that was fun and far easier than I expected - trick seems to be to just keep going

    Stall the lathe by having my steady too tight on the workpiece

    Get smelly oil all over my hands

    Not keep offcuts in the lathe stand cabinet cos they can rattle and tinkle a bit and you think its something wrong with the lathe



    quite happy

    Bill

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