Screw Drive Types (was Re: Slotted Wood Screws)

[Conrad Hoffsommer]

At 11:42 2/6/2004 -0800, you wrote:

> >Point of Interest . .
> >
>
>In what way are they superior?  What's wrong with TORX?
>
>I have an article comparing torque that can be developed on fasteners with
>various drive types using power drivers.  Interestingly, the Phillips is
>about the same as the square drive.  The TORX can develop almost twice as
>much as either one.  And the TORX PLUS slightly more.  (Also interesting to
>me is that the internal hex drive develops less than half the torque of
>the Phillips or square drives).
>
>I can post scans of the article if anyone is interested.



Torx, schmorx, Robertson, Phillips, etc., etc.

Is there a comparison of ease of use when driver is not (or cannot be) 
perfectly aligned with fastener?  Seems to me that square, hex or any of 
the spline types have to be aligned pretty closely or use a special ball 
tip driver.



Conrad Hoffsommer - Music Technician
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