Hello, everyone.
This is Enta.
In our previous post, we introduced crown bits for drilling in high-water-pressure environments.
Here is an introduction to the Kronenbit drilling method.
That said, it’s actually extremely simple—it’s exactly the same as a standard single-hole drilling (outer hole drilling).
Attach the drive shoe designed specifically for Kronen bits to the outer casing starter.
Next, install the Kronenbit.
Attach it so that it bites firmly into the grub screw.
The part with the set screw is loose.
If it weren't this easy, it wouldn't make sense because you wouldn't be able to do it, lol.
You can't get it in the forward rotation, but if you switch to the reverse rotation and deliver a light strike, you can get it.
If it hasn't been removed, the anchor will rise, so you'll know right away.
And that's it!
We’ll proceed with drilling under these conditions, but unless the soil is definitely sandy, the drilling will take a very long time.
When drilling into soil mixed with stones or gravel, it takes quite a bit of time.
Also, it can sometimes bounce off clay.
In that case, we recommend trying a different type of crown bit, or first drilling a double-pipe hole and then drilling with the crown bit.
The difference in drilling speed is obvious.
See you later.
For inquiries regarding Kronenbit, please contact Fujiwara Industries.
