My #0 Phillips Screwdrivers are different sizes... - Page 2 - Electronic Circuits Projects Diagrams Free

zevon8 · 20th July 2006, 10:12 PM

It may be a Posidrive, but it may also be either a Frearson ( Reed-Prince as mentioned above ) or it may be a Japanese Industrial Standard #B 1012:1985, which is very similar to the Posidrive, but has no small squre recess in the middle. The JIS is a clean, sharp cornered recess, that won't cam-out like the curved cornered original Philips.

My money is still on the JIS style, since it will work in JIS fasteners ( duh,) and Posidrive, and plain Philips. Not so with the others.

dknguyen · 21st July 2006, 01:30 AM

I don't know...the one I know is phillips was made in Germany and all the other ones are just "generic" crossheads. It's hard to believe they would be anything other than phillips...maybe generics means messed up sizes too?

I think I saw a few Pozi-Drives a long time ago when I was real little. How visible is the square in the center of the cross on a Pozi-drive? It was significant enough so that I thought it was designed so that a robertson and phillips could be used (similar to some slotted heads that have a square so you can also use a robertson).

zevon8 · 21st July 2006, 11:35 PM

Basically, the Philips drivers have either a curved fillet at the place where the two lines meet, not a clean 90 degree meeting at the corner.

Everything else is either a clean 90 degree corner, or has a small outward step. It can often come down to what quality of machines the manufacturer has in their plant, or how they machine the ends.

The combo screws are just that, useable with either a philips or a robertson driver. This lets them sell the product in the USA and Canada. Robertson square recess drivers are not as common in the USA as in Canada. This feature is very common on electrical wiring devices such as outlets, light switches, etc.

spuffock · 23rd July 2006, 09:11 PM

I was looking for a conical-point driver to fit all those conical-hole screws there seem to be about today, but all I get is odd looks whenever I try to buy one.

24th July 2006, 10:01 AM

Pozidrive drivers have a parallel blade and philips(yes one L) have a tapered blade. If you try to use a philips in a pozi head it slips as does a pozi used in a philips head. Being constantly armed with a pozi I can say I rarely meet a philips even though nearly every cross-head screwdriver sold is a philips.

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20th July 2006, 10:12 PM	(permalink)
zevon8	It may be a Posidrive, but it may also be either a Frearson ( Reed-Prince as mentioned above ) or it may be a Japanese Industrial Standard #B 1012:1985, which is very similar to the Posidrive, but has no small squre recess in the middle. The JIS is a clean, sharp cornered recess, that won't cam-out like the curved cornered original Philips. My money is still on the JIS style, since it will work in JIS fasteners ( duh,) and Posidrive, and plain Philips. Not so with the others.

21st July 2006, 01:30 AM	(permalink)
dknguyen	I don't know...the one I know is phillips was made in Germany and all the other ones are just "generic" crossheads. It's hard to believe they would be anything other than phillips...maybe generics means messed up sizes too? I think I saw a few Pozi-Drives a long time ago when I was real little. How visible is the square in the center of the cross on a Pozi-drive? It was significant enough so that I thought it was designed so that a robertson and phillips could be used (similar to some slotted heads that have a square so you can also use a robertson).

21st July 2006, 11:35 PM	(permalink)
zevon8	Basically, the Philips drivers have either a curved fillet at the place where the two lines meet, not a clean 90 degree meeting at the corner. Everything else is either a clean 90 degree corner, or has a small outward step. It can often come down to what quality of machines the manufacturer has in their plant, or how they machine the ends. The combo screws are just that, useable with either a philips or a robertson driver. This lets them sell the product in the USA and Canada. Robertson square recess drivers are not as common in the USA as in Canada. This feature is very common on electrical wiring devices such as outlets, light switches, etc.

23rd July 2006, 09:11 PM	(permalink)
spuffock	I was looking for a conical-point driver to fit all those conical-hole screws there seem to be about today, but all I get is odd looks whenever I try to buy one.

24th July 2006, 10:01 AM	(permalink)
Paul Obrien	Pozidrive drivers have a parallel blade and philips(yes one L) have a tapered blade. If you try to use a philips in a pozi head it slips as does a pozi used in a philips head. Being constantly armed with a pozi I can say I rarely meet a philips even though nearly every cross-head screwdriver sold is a philips.