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Chucking and Measuring > Is it worth the extra $?

Thread: Is it worth the extra $?

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\r\n Is it worth the extra $?\r\n

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\r\n I am going to replace my 3-jaw chuck with a 4-jaw on my 4th axis cnc.
\nIt does not turn fast, max rotational speed is probably 120rpm at best.
\nI cut both square and round stock... wood, plexi, plastic, aluminum, brass and copper.
\nI have searched and searched but cannot figure out what brand my current 3-jaw chuck is:
\nAttachment 493766
\n
\nI was hoping whatever company this is, has a 4-jaw model that fits the same bolt pattern of the 3-jaw.
\nAttachment 493768
\n
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\nBut, if I cannot figure that out or there are no matching bolt pattern 4-jaw chucks, I have found two on ebay that look good.
\nI only have 3.25" between center of chuck to the base plate... so a 6" jaw would crash if the jaws ever extend past the chuck diameter.
\nI will just have to mill an adapter plate myself since I also havent been able to find a 1" keyed shaft matching a new chucks bolt pattern.
\nThis one is cost effective:
\nhttps://www.ebay.com/itm/123457506296
\n
\nThis one sounds like better quality:
\nhttps://www.ebay.com/itm/330720133144
\n
\nSo is the second one worth paying almost twice as much for?
\nI\'m curious if the \'self centering\' only works with a higher RPM?
\nI would like your guys input, maybe even a better option available?
\n
\nClick image for larger version. \r\n\r\nName: CNC 4axis small.jpg \r\nViews: 0 \r\nSize: 118.2 KB \r\nID: 493770\r\n
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    \r\n \r\n \r\n \r\n 06-12-2023, 05:58 PM\r\n \r\n \r\n \r\n \r\n #2\r\n \r\n \r\n \r\n \r\n \r\n
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    \r\n Re: Is it worth the extra $?\r\n

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    \r\n the second chuck looks better made and though shars sells chinese products they are known to sell decent stuff . Regardless they are both cheap compared to high quality chucks . Personally I\'d go with a 4 jaw that has independent jaws and not self centering .
    \nThe rpm rating is irrelevant when being used on a rotary . Thats more of a balancing thing for high rpm work which doesn\'t apply in this situation\r\n
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    \r\n \r\n \r\n \r\n 06-17-2023, 02:49 PM\r\n \r\n \r\n \r\n \r\n #3\r\n \r\n \r\n \r\n \r\n \r\n
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    \r\n Re: Is it worth the extra $?\r\n

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    \r\n I bought the shars, just arrived, looks good except for an error on the back plate... almost looks like a machine crash
    \nFits the 1.5" square stock with plenty of base clearance and good clamping power.\r\n
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    1. 06-12-2023, 05:32 PM #1
      viroy
      viroy is offline Member
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      Is it worth the extra $?

      I am going to replace my 3-jaw chuck with a 4-jaw on my 4th axis cnc.
      It does not turn fast, max rotational speed is probably 120rpm at best.
      I cut both square and round stock... wood, plexi, plastic, aluminum, brass and copper.
      I have searched and searched but cannot figure out what brand my current 3-jaw chuck is:
      Attachment 493766

      I was hoping whatever company this is, has a 4-jaw model that fits the same bolt pattern of the 3-jaw.
      Attachment 493768


      But, if I cannot figure that out or there are no matching bolt pattern 4-jaw chucks, I have found two on ebay that look good.
      I only have 3.25" between center of chuck to the base plate... so a 6" jaw would crash if the jaws ever extend past the chuck diameter.
      I will just have to mill an adapter plate myself since I also havent been able to find a 1" keyed shaft matching a new chucks bolt pattern.
      This one is cost effective:
      https://www.ebay.com/itm/123457506296

      This one sounds like better quality:
      https://www.ebay.com/itm/330720133144

      So is the second one worth paying almost twice as much for?
      I'm curious if the 'self centering' only works with a higher RPM?
      I would like your guys input, maybe even a better option available?

      Click image for larger version.  Name: CNC 4axis small.jpg  Views: 0  Size: 118.2 KB  ID: 493770
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