"Fredxx" wrote in message
...
On 19/02/2019 20:21:02, Rod Speed wrote:


"Commander Kinsey" wrote in message
news
On Tue, 19 Feb 2019 17:02:54 -0000, Clare Snyder
wrote:

On Tue, 19 Feb 2019 00:15:18 -0500, wrote:

On Mon, 18 Feb 2019 22:46:25 -0500, Clare Snyder
wrote:

On Mon, 18 Feb 2019 19:08:44 -0700, rbowman
wrote:

On 02/18/2019 08:38 AM, Commander Kinsey wrote:
They shouldn't call them self tapping because they rarely do unless
the
wood is very soft indeed. Usually the force to create the hole
wears
off the er.... the bit the screwdriver goes into. I almost always
use a
pilot drill first, unless I'm in a hurry, then I curse the bloody
screws
when they burr.

Using the correct size of a quality screwdriver helps. What is the
UK
equivalent of Harbor Freight?
"Self drilling" is the term, and if they aren't Chinese junk they are
usually good for 16 guage steel - perhaps 14. Useless foir anything
heavier. Chiners junk is good for about 18 guage aluminum on a good
day.

Actually there are at least four types of screw that cut their own
thread.
You have the self drilling that is a sheet metal screw with a drill
bit tip on the end that actually drills the pilot hole (Commonly
called Tek screws)
Then there is the self tapping sheet metal screw that just has a point
on the end and gnaws it's way in
The third is a "swage form" machine screw that goes into a pilot hole
and the tip is threaded all the way to the end with a slight taper and
a triangular shape until it gets to the body of the thread. It
actually swages threads
The 4th is a self tapping machine screw that has a tapered thread and
slits cut in it to take away the waste material just like a tap.
I have some of each type if anyone wants pictures.
From the complaint I had pretty much ruled out the common sheet
metal screw with the sharp split tip and the swage form - basically
narrowing it down to the "tek" - but then he complained about it only
working if the "wood" was soft - - - -

I really think he needs to limit himself to socket head (allen) or
hex head screws - and eventhen he needs to use the correct size
driver.

PZ2 is easier to use. I'm just saying they shouldn't be sold as "self
tapping" if they really need a pilot hole.

They are called self tappers because they tap the hole.

They arent called self drillers, stupid.

Perhaps Australia is behind the times:
https://en.wikipedia.org/wiki/Self-t...drilling_screw

Just you being a ****wit, as always. That's just ONE TYPE of self tapper,
****wit.

https://www.firstcallautosupply.com/...apping-screws/

Or is it just you being stupid?

Nope, you being a ****wit, as always.