mini ice screws placement test

[lummox]

test summary: how you place a screw affects its integrity. no shit.

[Rafael_H]

I was there too, very interesting. Don't know though what all that fracturing translates into.

 

Ade, what's the gist on this from the book, please? Got me really curious.

 

The knob theory is nonsense by me. Once I saw the fracturing pattern I didn't even use the knob. There is less fracturing when driving the screw in slower. The BD screw was a used one - so duller. I read on Grivel's site about the special angle their screw has on the teeth. I sold mine but I bet the blade part of the tooth is more angled. Anybody confirm? BTW, Grivel sells a screw sharpening machine!

 

Finally, that demo was done on transparent ice, no air bubbles, one avoids this kind anyway...

[Jens]

I don't really understand this thread or what a block of party ice shows, but I sure like firing in a BD turbo express when I'm pumped and the clock is ticking!