John Ruth---
I was convinced by a post from Todd Hughes (too long ago, I miss you Todd)
that Slotted Screws that'll show should be turned by drivers ground to fit the
slots but NOT to reach the bottom of the slots.
A gunsmith would find (or file) a driver point to engage the slot's lips as
perfectly as possible and to wedge tight just before contacting at the tip---
thus creating a perfect holding wedge action, and minimizing the possibility of
slipping out while torquing up the end. So I do that when I'm driving screws
that'll show and I have always like the look of slotties. It's unconscious for
me, now, but I just realized I choose Yankee slot tips by the same criteria.
gluck widdat---Gam in OlyWA
How horrible it is to have so many people killed!---And what a blessing one
cares for none of them!
Jane Austen
On Wednesday, February 20, 2019, 9:07:28 AM PST, John Ruth
wrote:
GG’s:
I’ve posted this before.
There is, or was, a standard for straight screw slots which was based on wire
gauges. If anyone can come up with a reference on this, I would greatly
appreciate it.
The intended scope of the standard is unclear; wood screws, machine screws, or
both. British or US?
Likewise, I can’t recall which of the several wire gauges was referenced.
Scott Grandstaff has it right; the only dimensions which are important are the
slots of the screws you are driving, which may or may not conform to some
standard.
That said, I’d like to grind a set of drivers for the US standard, if there is
one.
John Ruth
In Metuchen, NJ, where it is beginning to snow.
Sent from my iPhone
> On Feb 20, 2019, at 2:49 AM, scott grandstaff wrote:
>
> And now you know why I have so many, and repair, and customize, and make from
scratch
>
> flat head screwdrivers
>
> --
> *******************************
> Scott Grandstaff
> Box 409 Happy Camp, Ca 96039
> scottg@s...
> http://www.snowcrest.net/kitty/sgrandstaff/
> http://www.snowcrest.net/kitty/hpages/index.html
>
> ------------------------------------------------------------------------
> OldTools is a mailing list catering to the interests of hand tool
> aficionados, both collectors and users, to discuss the history, usage,
> value, location, availability, collectibility, and restoration of
> traditional handtools, especially woodworking tools.
>
> To change your subscription options:
> https://oldtools.swingleydev.com/mailman/listinfo/oldtools
>
> To read the FAQ:
> https://swingleydev.com/archive/faq.html
>
> OldTools archive: https://swingleydev.com/ot/
>
> OldTools@s...
------------------------------------------------------------------------
OldTools is a mailing list catering to the interests of hand tool
aficionados, both collectors and users, to discuss the history, usage,
value, location, availability, collectibility, and restoration of
traditional handtools, especially woodworking tools.
To change your subscription options:
https://oldtools.swingleydev.com/mailman/listinfo/oldtools
To read the FAQ:
https://swingleydev.com/archive/faq.html
OldTools archive: https://swingleydev.com/ot/
OldTools@s...
|