Video: Fifth-Axis Tombstone Workholding Solution

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Watch an HMC perform five-axis machining using a tombstone that has multiple indexers installed.


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In this column, I asked to see interesting fixturing solutions that shops have developed to address common (or unique) workholding woes. I’ve received a few replies and will soon report on them. However, this calls to mind a nifty fifth-axis workholding solution for tombstones that KMECNC developed to speed machining while holding tight tolerances for billet RC helicopter engine components. It now offers its five-axis tombstone solution to other shops.

Read more about the device.


  • Too Small To Touch

    Hummingbird takes on machining work that is too small for most shops to handle. In fact, Hummingbird tries not to handle it either. To accurately machine the tiniest parts, this shop relies on processes that are as hands-off as possible.

  • A Study Of The Steady Rest

    When the length and stiffness of a workpiece make it difficult to machine without distorting or deflecting the part, many manufacturers turn to the steady rest as a workpiece support device. This is especially true for long axles, shafts and similar parts used in automotive or heavy equipment applications, and in oil drilling components. The most common application is to support a workpiece during turning or milling and, increasingly, during secondary operations such as ID drilling, boring and producing end face bolthole patterns.

  • Workholding In A Vacuum

    An aerospace machine shop meets a special need by using a vacuum chuck.

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