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Re: Manufacturing of an increment borer

Looks like I finally finished the model and It's as close as I can get to the actual thing. The tapering of the cone changes slightly near the shaft but that seemed to me to be unnecessarily complicated for such a part so it was overlooked. The files are attached in a .zip folder below in .STL file ...
by jcruddat
Sun Jan 14, 2018 5:39 pm
 
Forum: Dendrochronology and Tree Ages
Topic: Manufacturing of an increment borer
Comments: 6
Views: 197

Re: Manufacturing of an increment borer

Hi Larry, I agree that the wall thickness is definitely something to consider when it comes to very long increment borers. Do you know if the wall thickness increases with length on Haglöf borers? I hear that Sweden has access to some very high quality iron ore deposits which they use to make what o...
by jcruddat
Tue Jan 02, 2018 10:43 pm
 
Forum: Dendrochronology and Tree Ages
Topic: Manufacturing of an increment borer
Comments: 6
Views: 197

Re: Manufacturing of an increment borer

Hi Dwain, Right now I am considering making the shaft out of 4130 chromoly steel and the threads out of some hardened 4340 chromoly steel. This is what was suggested to me by some guys in the discussions I started in the PracticalMachinist and CNCZone forums (http://www.practicalmachinist.com/vb/cnc...
by jcruddat
Tue Jan 02, 2018 5:52 pm
 
Forum: Dendrochronology and Tree Ages
Topic: Manufacturing of an increment borer
Comments: 6
Views: 197

Manufacturing of an increment borer

Hi all, I have recently taken on the challenge of machining a 28" to 30" long increment borer at the CNC machine shop of my school, Worcester Polytechnic Institute, for the purpose of drilling closer to the pith of the 150+ year old tulip poplars, 250+ year old sugar maples, and other old ...
by jcruddat
Mon Jan 01, 2018 2:34 am
 
Forum: Dendrochronology and Tree Ages
Topic: Manufacturing of an increment borer
Comments: 6
Views: 197

Re: Oldest Tree in Connecticut Followup

Thanks. My next target species for old age in Connecticut is probably going to be black gum ( nyssa sylvatica ) and then northern white-cedar ( thuja arborvitae ). I know that there at least a few black gum swamps with old growth characteristics and some swamps containing northern white-cedar (not s...
by jcruddat
Sun Oct 08, 2017 11:17 pm
 
Forum: Dendrochronology and Tree Ages
Topic: Oldest Tree in Connecticut Followup
Comments: 7
Views: 457

Re: Oldest Tree in Connecticut Followup

Thanks,
Would definitely core that tree it if I could.

Jack
by jcruddat
Mon Oct 02, 2017 6:20 pm
 
Forum: Dendrochronology and Tree Ages
Topic: Oldest Tree in Connecticut Followup
Comments: 7
Views: 457

Oldest Tree in Connecticut Followup

Hi all, For those of you who are interested, I recently published an article in the Connecticut Woodlands Magazine to follow up from my first post called Oldest Tree in Connecticut? found here: (http://ents-bbs.org/viewtopic.php?f=18&t=7887). For those of you who have not seen that post, the art...
by jcruddat
Mon Oct 02, 2017 10:58 am
 
Forum: Dendrochronology and Tree Ages
Topic: Oldest Tree in Connecticut Followup
Comments: 7
Views: 457

Re: Oldest tree in Connecticut?

Thanks Bob. It is very encouraging to hear of so much interest in one tree.

Jack
by jcruddat
Thu Dec 22, 2016 9:15 pm
 
Forum: Post Here First - Introduce Yourself
Topic: Oldest tree in Connecticut?
Comments: 12
Views: 1162

Re: Oldest tree in Connecticut?

Erik, Although I have not read their book, Peter Kelly and Douglas Larson's work on northern white cedars is actually what inspired me to check out the cedars growing on the trap rock ridges of Connecticut. I did find another cedar that is 225+ years old and I believe there are likely others close b...
by jcruddat
Sun Dec 18, 2016 4:27 pm
 
Forum: Post Here First - Introduce Yourself
Topic: Oldest tree in Connecticut?
Comments: 12
Views: 1162

Re: Oldest tree in Connecticut?

Rand,
That a good point. There are some other fairly sized dead cedars at the bottom of the ridge that I might be able to be cross date with the 550+ year old cedar.

Jack
by jcruddat
Sun Dec 18, 2016 4:16 pm
 
Forum: Post Here First - Introduce Yourself
Topic: Oldest tree in Connecticut?
Comments: 12
Views: 1162
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