will the chip cavity in wood screws really not require a pilot hole
i am seeing them advertised as such but i hvae my doubts
i may order some but i do not have any to test and i think for my application
the chip cavity might not be enough to go pilot holeless
it is more of a nice to have feature than a must have feature for me
i think the real purpose of the chip cavity is a good idea to allow driving
into harder woods but have doubts about no pilot hole required
I'm not sure what you mean by "chip cavity."
The chiseled point on modern screws it simply meant to shear the wood
fibers and help cut threads for the screws. It was never intended to
drill a pilot hole, collects "chips," nor eject any wood like a drill bit.
The main reason wood splits from a screw is because it wedges into the
wood, between the grain, which causes a split. It's not because the
wood is making room for the size of the screw, as there's plenty of room
in most woods for the wood fibers to compress to make room for most
screws. Many hardwoods are dense enough to benefit from a pre-drilled
hole, but it's not always necessary even in hardwoods.
I have, in fact, had occasions where a piece of hardwood split with the
use of a pilot hole but *not* when using a chisel-tipped, self-drilling
screw. The shearing of the wood fibers is the key to this.
For decades, I've used the old-timer carpenters' trip of blunting the
tip of a nail before driving it near the end of a board to keep the
board from splitting. This has the same effect of shearing the wood
fibers as it enters and travels through the wood, instead of wedging and
pushing the grain apart.
In most cases it works. In some cases, it's asking too much. It's the
same for modern, self-drilling screws... I rarely ever pre-drill a pilot
hole for them.
Please discover punctuation.
"Playing is not something I do at night, it's my function in life"
that was the term used to describe the cavity at the screw tip
it runs up the length of the tip toward the head
think of a pie slice extruded out of the screw shaft to the center of the
screw shaft and extending from the tip to 1/4 way up or so
described as a cavity to allow the screw tip to seat better into hard woods
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