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投稿日: Jun 08, 2018 4:44:16 AM
I read an interesting discussion on how to start increment borer
on ITRDBFOR mailing list.
In addition to "bore starter" and "belted screw-in starter", Smartborer
can be used to start increment borer (to make it engage with wood).
Firstly, you set the reaction bar in horizontal direction, then two or
three people can push the borer tip against the bark while the middle
person drives the borer clock wise. Compared to other methods, it
takes shorter time to start the borer.
> In my experience with hardwoods and with taking 12-mm diameter cores from
> both hardwoods and softwoods, I like using a mechanical starter. Henri's
> article shows the chest-brace type of starter (Fig. 5B). Although I will
> brand myself as being wimpy, I prefer the heavy-duty belted screw-in starter.
> Yes, it does take time to set and reset, and it's another thing to carry in
> the woods, but it enables me to collect wide (or the usual narrow cores)
> from quite dense hardwoods.
>
>
> Kevin T. Smith, PhD
> Supervisory Plant Physiologist
> Forest Service
> Northern Research Station
> p: 603-868-7624
> c: 207-351-5671
> f: 603-868-7604
> ktsmith AT fs.fed.us
> 271 Mast Road
> Durham, NH 08324
> www.fs.fed.us
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