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Thread: Robinson Table saw rebuild finished

  1. #31
    Join Date
    Dec 2008
    Location
    Ouray Colorado
    Posts
    1,384
    Amazing job Mark! As usual for you. Thanks for posting.

  2. #32
    Join Date
    Jul 2007
    Location
    Inkerman, Ontario, Canada
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    1,369
    Thanks Ron, machining tolerances keep you on your toes. Are or were you a machinist?
    The lathe is a grand old beast from the 1950's Dean Smith and Grace, made in England, weighs over 5000lb! Lots of fun exploring the potential of this machine. It would be nice to work alongside someone who could teach me. So much to learn and figure out.
    The photo is from when i was moving it into the shop a few years back.

    SAM_3848.jpg

    Quote Originally Posted by Ronald Blue View Post
    Looks like you have a nice lathe as well Mark. Collet chuck on it. Setting up to cut threads brings back memories. You are a skilled machine rebuilder. Taking the steps to make sure it works as good as it looks.

  3. #33
    Join Date
    Mar 2010
    Location
    Somewhere in the Land of Lincoln
    Posts
    2,525
    I worked as a machinist/tool and die maker the first 19 years of my working career. When I went to work on the railroad I never did any actual machining any longer. I benefited from my background often though in machine repair. A well made lathe that is in good condition is a delight to run. I retired 2 years ago.

  4. #34
    Join Date
    Jul 2007
    Location
    Inkerman, Ontario, Canada
    Posts
    1,369
    That's a good background to have, and will always help you. The only "formal" training that I had was doing woodwork and metalwork at school in England for a year or two in the late 60's, but it was enough to get me hooked, plus my father was a carpenter joiner, so I have always been a tinkerer.

    Quote Originally Posted by Ronald Blue View Post
    I worked as a machinist/tool and die maker the first 19 years of my working career. When I went to work on the railroad I never did any actual machining any longer. I benefited from my background often though in machine repair. A well made lathe that is in good condition is a delight to run. I retired 2 years ago.

  5. #35
    Join Date
    Jul 2007
    Location
    Inkerman, Ontario, Canada
    Posts
    1,369
    This is the tilt gearbox.
    The bushings were a little loose for me, so I made a new bushing for the screw shaft and a new shaft for the crank handle that went through the two long bushings. I also made a new thrust bushing.

    you can see in the second to last photo the old shaft is 0.002" under 1" and in the last photo the new shaft is (approximately)0.0005" under. The caliper only shows half thou, not tenths. So anyway the new shaft fits very nicely in the bushings.

    RobinsonETE (111).jpg PXL_20210611_225839632.jpg PXL_20210621_234813543.jpg PXL_20210622_193756559.jpg PXL_20210622_193830342.jpg RobinsonETE (120).jpg RobinsonETE (118).jpg

  6. #36
    Join Date
    Jul 2007
    Location
    Inkerman, Ontario, Canada
    Posts
    1,369
    I pressed out the old bushing. Made a new bushing, Pressed it in to the casting. Then skimmed the shaft to fit the bore of the bushing.
    The bushing to shaft fit needs to be done after the bushing is pressed into the casting, as pressing the bushing in reduces the bore size.


    PXL_20210613_163802261.jpg PXL_20210613_164244952.jpgPXL_20210613_164356099.jpgPXL_20210621_215228240.jpg PXL_20210621_222702961.jpg PXL_20210621_234713542.jpg PXL_20210621_234813543.jpg PXL_20210622_000414349.jpg

  7. #37
    Join Date
    Jul 2007
    Location
    Inkerman, Ontario, Canada
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    1,369
    I made a new thrust bushing. made it a little thicker than the old one so that it moved the gears a little closer together to remove play, the put some lapping paste and rotated it a bunch to mesh the gears, disassembled and thoroughly cleaned and re-assembled it. So now the shafts fit nice and the gears fit nice. Everything runs snug and smooth.

    PXL_20210622_193756559.jpg RobinsonETE (68).jpg RobinsonETE (70).jpg PXL_20210622_175624092.jpg PXL_20210622_192145562.jpg PXL_20210622_193830342.jpgPXL_20210611_225839632.jpg

  8. #38
    Join Date
    Jul 2007
    Location
    Inkerman, Ontario, Canada
    Posts
    1,369
    I jigged the shafts on the drill press to drill the holes accurately, drilled and taper reamed the holes, made new taper pins, installed the motor mount and tilt mechanism, shafts, collars, thrust washer and pins.


    PXL_20210611_204506920.jpg RobinsonETE (154).jpg RobinsonETE (156).jpg RobinsonETE (159).jpg RobinsonETE (70).jpg PXL_20210611_225839632.jpg

  9. #39
    Join Date
    Jul 2007
    Location
    Inkerman, Ontario, Canada
    Posts
    1,369
    To pin the collars accurately is quite fussy, pre-drill the collar, install, slip a sleeve over the shaft, clamp snug and drill in place. All good exercise for the brain, trying to figure the sequence to get things accurate and snug fit.

    RobinsonETE (152).jpg RobinsonETE (151).jpg

  10. #40
    Join Date
    Jul 2007
    Location
    Inkerman, Ontario, Canada
    Posts
    1,369
    Gearbox installed.



  11. #41
    Join Date
    Jul 2007
    Location
    Inkerman, Ontario, Canada
    Posts
    1,369
    A flash of insight on the Robinson motor!


  12. #42
    Join Date
    Jul 2007
    Location
    Inkerman, Ontario, Canada
    Posts
    1,369
    assembled the motor and installed it. Surface ground the collars and installed them, put on a blade and checked the rise and fall for accuracy, it was within a thou over 5" of travel, which is probably as good as I can get with a sawblade, a precision plate would be more accurate I am sure. but this is pretty good.


    PXL_20210713_233248985.jpgPXL_20210713_233229597.jpgPXL_20210720_190723080.jpgPXL_20210722_163124014.jpgPXL_20210722_164635809.jpg

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