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Thread: Pot chuck

  1. #11

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    Trepanning (drilling): What is trepanning?

    This tool maker explains "trepanning"

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  3. #12

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    Quote Originally Posted by mklotz View Post
    The collet version of what we call a pot chuck is called a step chuck. Here's a video of one being used...



    I know of no synonyms for "trepanning". It's the word that is used to describe that operation.

    "a surgical intervention in which a hole is drilled or scraped into the human skull, exposing the dura mater to treat health problems related to intracranial diseases. It may also refer to any "burr" hole created through other body surfaces, including nail beds. It is often used to relieve pressure beneath a surface. A trephine is an instrument used for cutting out a round piece of skull bone."

    Now used in metalwork as well.

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    Quote Originally Posted by mklotz View Post
    The collet version of what we call a pot chuck is called a step chuck. Here's a video of one being used...



    I know of no synonyms for "trepanning". It's the word that is used to describe that operation.
    The root for this word is to bore, to auger. From the Greek noun, trepanon.
    In medicine, the trephine is simply a saw that cuts a hole in bone, typically the skull. AKA "burr holes"

    The word bore can be used interchangeably with trephine. At least that's how we use it in medicine.

    Nitrous

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    Bony's Tools
    Thanks Evilwrench (making sure I don't misspell it). In other words the process of uding an annular cutter, as used in magnetic drills. A fancy word for a simple and common process.

  6. #15
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    mklotz's Tools
    Unfortunately, the word "bore" has a very specific meaning in the metalworking world. It refers to the hole forming method done with a boring bar on a lathe or with a boring head on a mill. Referring to a trepanning operation as "boring" will cause confusion.

    Take a look at the flywheels on this engine...



    Each flywheel is cut from the solid. The process of removing the material between the hub and rim to form the web is called trepanning.
    Last edited by mklotz; 07-11-2017 at 11:01 AM.
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  8. #16

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    https://www.mscdirect.com/browse/tn/...ig&hdrsrh=true

    The link above is a look at what they call a "trepanning" tool. Really tricky to use at times and nerve wracking.

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    Bony's Tools
    Thanks guys. Not wishing to contradict or confuse I quote from page 1051 of the 28th edition of Machinery's Handbook (which some refer to as the world's principal reference work for metalworking) .....

    Trepanning
    Cutting a groove in the form of a circle or boring a cutting hole by removing the center or core in one piece.Shallow trepanning is also called face grooving can be performed on a lathe using a single-point tool that is similar to a grooving tool but has a curved blade. And the paragraph continues for a further half page stating in passing that trepanning is probably the most economical method of producing deep holes that are 2 inches and larger in diameter.

    Hope this is helpful.


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