Dendrochronology Wood Core Sample Bit
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Thread: Dendrochronology Wood Core Sample Bit

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    BethesdaEC's Avatar
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    Dendrochronology Wood Core Sample Bit

    I have a dendrochronology working at my house today trying to date the timbers. Basically they take a core sample of the wood and match the core to known growth patterns to determine when the tree was cut down. Anyways he had a guy in Germany fabricate some core sample bits years ago but the guy is retired now and he is looking have 5 or 6 new one made. The are like a hole saw without a center guide bit and then take 1/2 cores and they have a very deep reach of about 12 to 18 inches. If anybody knows of a place that fabricates specialty tools like this let me know.
    JD 2520 w/ Loader and 46 BH. BB1060, Front Blade, Artillian Forks and Wallenstein BX42r.

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    BethesdaEC's Avatar
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    Here is what they look like. They are a stainless steel tube with a brazed on commercial cutter head. They are removable from the bit holder so that the samples can be pushed out with a dowel rod.
    Attached Thumbnails Attached Thumbnails IMG_0181.JPG   IMG_0182.JPG   IMG_0185.JPG  
    JD 2520 w/ Loader and 46 BH. BB1060, Front Blade, Artillian Forks and Wallenstein BX42r.

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    Captain Hook Kennyd's Avatar
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    That is very interesting...how does it get started without the pilot?

    I don't know anybody of the top of my head, but maybe look for a Tool and Die shop possibly-they often due custom work.
    Kenny

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    BethesdaEC's Avatar
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    Quote Originally Posted by Kennyd View Post
    That is very interesting...how does it get started without the pilot?

    I don't know anybody of the top of my head, but maybe look for a Tool and Die shop possibly-they often due custom work.
    He nails a guide plate to the beam to stop it wandering. Just like if you want to enlarge a hole with a holesaw. Drill though a scrape piece of wood and clamp or nail the board to center the bit.
    JD 2520 w/ Loader and 46 BH. BB1060, Front Blade, Artillian Forks and Wallenstein BX42r.

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    as a machinist that looks to be a pretty simple job. unless he wants total new ones made, they can just replace the bimetal holesaw on the end. cut the old one off, modify the new one, and reattach.

    he may also want to look into a carbide tipped hole saw for a replacement? they should last a LOT longer

    any tool & die or machine shop(not engine rebuilding machine shop) should be able to do this.

    -Aaron
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    BethesdaEC's Avatar
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    Quote Originally Posted by 4vertical View Post
    as a machinist that looks to be a pretty simple job. unless he wants total new ones made, they can just replace the bimetal holesaw on the end. cut the old one off, modify the new one, and reattach.

    he may also want to look into a carbide tipped hole saw for a replacement? they should last a LOT longer

    any tool & die or machine shop(not engine rebuilding machine shop) should be able to do this.

    -Aaron
    If you think you can do this for him for a reasonable fee PM me your contact info and I will forward the info.
    JD 2520 w/ Loader and 46 BH. BB1060, Front Blade, Artillian Forks and Wallenstein BX42r.

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    lol not me. not my shop. i am just the grunt in the shop. we have done a lot more complicated repairs. any good local shop in my opinion should be able to perform this. it is not much different than stubbing a shaft that has spun a bearing.

    -Aaron
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    artillian pallet forks
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    Do a search for an increment borer. It is the tool foresters use to age trees, the core sample may be smaller than the one shown in your picture. One forester supply house is called Ben Meadows.

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    BethesdaEC's Avatar
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    Quote Originally Posted by rm-mi View Post
    Do a search for an increment borer. It is the tool foresters use to age trees, the core sample may be smaller than the one shown in your picture. One forester supply house is called Ben Meadows.
    I don't believe that these drill bits work on old hard dry wood very well. I am looking for a machine shop that can braze a new cutter onto the existing bits. I believe that the cutters are standard hole saws that have had the back cut off and then are brazed onto the custom shaft.
    JD 2520 w/ Loader and 46 BH. BB1060, Front Blade, Artillian Forks and Wallenstein BX42r.

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    Captain Hook Kennyd's Avatar
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    Well Guess who ended up with this job?

    Yup...Me. I just can't say no

    I did two for Mick the other week, and he liked them so I got the rest from him this past week.

    I did indeed use carbide tipped hole saws as 4verticle suggested, and after parting off the threaded piece on the end I turned them to fit inside the tubing.

    I got 7 bits made up today on the lathe, still need to braze them.
    Attached Thumbnails Attached Thumbnails IMG_1422.jpg   IMG_1423.jpg   IMG_1424.jpg   IMG_1421.jpg  
    Kenny

    -John Deere 3720 Deluxe Cab TLB
    FEL, MMM, Artillian 42" Forks and Modular Grapple, I-Match, Ballast Box, and lots of other STUFF.
    -John Deere 455 w/60" MMM


    Bolt on Grab Hooks and other cool stuff are now for sale!!

    Visit our YouTube Channel

    My Equipment:
    John Deere 3720 Deluxe Cab, 300cx FEL, 366 Front Blade, 59" Front Snowblower, Ballast Box
    Artillian 3K Forks, Grapple, Front-Hoe Bucket
    John Deere 455, 60" MMM

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