How to use

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Just like using increment borer, there are many tricks to learn when suing Smartborer. How to use Smartborer is explained in detail at "Member area".

How to use Smartborer is also explained in Kagawa, A. & Fujiwara, T. Journal of Wood Science (2017) https://doi.org/10.1007/s10086-017-1668-6  PDF

For a brief introduction, you can watch the video here.
General view of the smart increment borer. 
(a) Power wrench, (b) gear box, (c) reaction bar, (d) 800-mm handle of increment borer (e) 450-mm handle of increment borer, (f) climbing rope, (g) standard or winch socket, and (h) increment borer. The depicted configuration is for the sampling of 12 mm cores. Winch socket can automatically start an increment borer because the rope winch presses the cutting edge of increment borer against the stem surface (video). The gearbox can contain large and small planetary gears, and is able to shift the gear ratio from 1:5 to 1:118 (video)


1. How to assemble.
 We carry (a) Makita electric wrench (usually with extra 2-3 batteries), (b) gearbox, (c) reaction bar, (f) rope, (g) socket, and (h) increment borer (450 mm, 12 mm core diameter) in a backpack. We also carry (d) a handle of long borer (800mm, 12 core diameter) separately. When we reach the tree to be sampled, handles of increment borer are attached to the (c) reaction bar so that the operator can support the upper/lower part of the reaction bar with his arm/leg, respectively.

2.How to start an increment borer
 We connect (a) the output (1/2 inch square) of electric wrench to the input of (b) the gearbox and push the threaded tip of increment borer against bark . We then slowly start the electric wrench so that the thread engages with wood. When starting, the operator  supports the right side of (d) the lower reaction bar (as depicted in the figure). The operator should pay special attention that there is nobody around, i.e. within the radius of (d) the reaction bar, because if operator suddenly starts the wrench without supporting the reaction bar, the reaction bar can suddenly move and may hit somebody. By starting the wrench slowly, the operator can feel how much reaction force he has to support with his leg and arm, he can then fully accelerate the wrench until the bit reaches desired sampling depth.

3. Sample recovery 
 After reaching the desired sampling depth, Smartborer is disconnected from the bit and the core is recovered manually

4. Pulling the bit out
 After sample recovery, Smartborer is reattached to the bit and the operator supports the LEFT side of the lower reaction bar. This time the wrench drives in opposite direction (counter-clockwise). Again, the  operator should start the electric wrench slowly after confirming there is nobody standing within the radius of the reaction bar.