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Thread: Hardinge HLVH Lathe Question

  1. #1

    Default Hardinge HLVH Lathe Question

    Iíve been running an HLVH at work without
    problem for a few weeks until today.

    Up until today facing a piece of round stock
    hasnít been a problem. I noticed today when
    I was facing that when I dialed in .020 for
    removal when it got to the center of the part
    the carriage had apparently backed off approx.
    .006 and of course didnít leave a good finish.

    I was using the power feed to face like I
    normally do and never had to lock the carriage
    to get it to stay in place until today.

    Iím not sure what might have changed, I
    use collets and the lathe chuck, and I was
    using a collet today. The only thing different
    I can think of is I was facing 1Ē dia. stock
    which is just a little bigger than what Iíve
    been machining.
    Iíve been using the same style insert at
    a slow rate of rpms and feeds, and the
    steel has just been 1018. The insert may
    have been worn a little but it wasnít chipped.

    Iím wondering if the carriage is supposed to
    lock somehow when you use the power feed
    or do you always have to lock it manually?

    Any help is appreciated.

  2. #2
    Join Date
    Aug 2004
    Location
    Sunny So Cal
    Posts
    4,919

    Default

    Not a hardinge but all my lathes get manually locked when finish facing. JR

    Maybe its a lock like my southbend. Where the grip can be adjusted. Maybe its always been a lil tight and someone else loosened it. JR
    My old yahoo group. Bridgeport Mill Group

    https://groups.yahoo.com/neo/groups/...port_mill/info

  3. #3

    Default

    The part is moving, it is unlikely that such a lathe has developed a crossfeed problem.

    Chuck or collet?

  4. #4

    Default

    I don’t think the part is moving. If the part
    was moving, then why is position of the
    DRO changing?
    If the part was moving it would be sliding
    back into collet farther not pushing the
    carriage out.

  5. #5

    Default

    My HLVH has a carriage lock and it is generally needed when facing. Also tool sharpness is a substantial factor causing it to push away from the work.

  6. #6
    Join Date
    Jan 2013
    Location
    Michigan
    Posts
    1,860

    Default

    Holy cats you broke the Hardinge!

  7. #7
    Join Date
    Mar 2015
    Posts
    3,501

    Default

    Try a new insert or rotate it to a new edge. I am in agreement that when the insert dulls, cutting forces increase. Or you can lock the saddle and use the same insert.

  8. #8
    Join Date
    Dec 2006
    Location
    Rugby, Warwickshire, England
    Posts
    1,014

    Default

    Congratulations! You just have learned why the HLV (and -H) have a nice, ergonomic, carriage lock sitting there waiting to be used...

  9. #9

    Default

    LOL

  10. #10
    Join Date
    Jan 2005
    Location
    Buffalo NY
    Posts
    4,435

    Default

    Note: Do NOT use water-based coolant on a HLV-H.
    It will kill it.

    -Doozer
    DZER

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