On Tuesday, August 11, 2015 at 5:56:21 AM UTC-7, jloomis wrote:
Yeah, the driver-not-straight was a jarring note. If one uses a mixture
of bits (Philips #1, Philips #2, Pozidrive, JIS, Reed and Prince, ...) for
crosspoint screws, it's inevitable that the heads will get damaged (and the
tips as well) because mismatch of shapes makes for excessive
stress and deforms the metal.
If one always uses the correct screwdriver tip, there's less damage, until
someone wags the screwdriver axis around. With the correct tip, and good
seating and alignment, (i.e. operator skill), heads don't get damaged and
tips last a long time.
Torx, Robertson, Bristol spline, and Allen socket screws are better because they
keep the bit on-axis; Bristol spline has the lowest stress on its driving surfaces
(because of the shape - driving faces are nearly parallel to radius), with Torx
close behind. Torx is apparently easily mass-produced.
This tip design probably has some kind of 'tooth' (structure or texture) that
keeps the tip seated, and purports to substitute for operator skill and allow
reuse of damaged fasteners. I'm not interested in that - it's probably better to
use standard tip designs, hone skills, and discard damaged fasteners. As for
removing recalcitrant fasteners... it's just another sometimes-it-might-work
Somehow that whole presentation strongly reminds me of the
ads on a low-budget cable station: "our product does
everything for the home handyman! It caulks and seals
windows! It penetrates and loosens stuck bolts! It's
a pet shampoo! Buy now and we'll throw in a second can
Given that a properly fitting phillips driver can pass
enough torque to snap a typical screw, I'm not really
seeing where this thing has any real advantages. Especially
when the typical screw head is some bastard hybrid of two
or more of the dozen "standard" phillips-like designs.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.