(This information is incorrect, see the reply below.)
Pozidriv drivers actually work very well on Philips screws, sometimes better than Philips drivers, due to the fact that the “vanes” are angled rather than curved, proving a larger contact area. Fit is definitely the larger factor, along with the quality of the screw metal.
I beg to differ. It’s the other way around. Using a pozidriv screwdriver on a philips screw almost guarantwes that you will strip the head when tightening.
Tip: In case of doubt, use a Phillips screwdriver. While they do not perfectly fit into the Pozidriv screws, one can at least insert the correct size. The use of Pozidriv screwdrivers in Phillips screws works only with screwdrivers that are too small and easily leads to damage of the screw or the tool.
You can find a pretty good explanation here or here
Maybe. The opposite isn’t really true in my experience. Pozi drivers work well enough on JIS heads but Philips drivers slip way too easily. The bad thing is that JIS looks like Phillips heads which probably is part of the reason for Phillips rep of slipping out.
No, no they don’t. You mix up Philips and JIS, you WILL have a bad day.
Source: I’m an old toolmaker that has made some nice pocket change over the years drilling out stripped out JIS screws on motorcycle engines from owners that didn’t know the difference. A decent amount from repeat customers too…
Oh, I absolutely believe that a Philips driver would ruin just about any other type of screw, but I don’t think that’s what the video talks about—they suggest using JIS drivers with Philips screws. Have you also seen problems with that combination?
When I was a toolmaker, a large part of my day was often spent removing stripped fasteners that others had messed up. And yes, I have seen that done, JIS used in place of Philips. They do equal damage, equally as well, and equally as easily.
The largest problem with ANY fastener system is that users are too stupid, lazy, and cheap to:
Buy quality fasteners. Cheap, Cheerful Chinese fasteners can often come pre-damaged and are cheese soft, saving so much time. Properly made, more expensive fasteners will seldom cause you a problem. (And yes, the Chinese do make quality items. YOU just won’t pay for them)
Buy quality tools and be sure they fit your fasteners correctly. The dollar store ain’t selling quality anything, anywhere, in that store.
Inspect your tools for wear and damage. They are consumables. Toss them when damaged or worn out.
Use the right tool for the job. If you don’t have the right tool, go buy it. Don’t try and fudge it.
(This information is incorrect, see the reply below.)
Pozidriv drivers actually work very well on Philips screws, sometimes better than Philips drivers, due to the fact that the “vanes” are angled rather than curved, proving a larger contact area. Fit is definitely the larger factor, along with the quality of the screw metal.They’re both junk next to Robertson though.
I beg to differ. It’s the other way around. Using a pozidriv screwdriver on a philips screw almost guarantwes that you will strip the head when tightening.
You can find a pretty good explanation here or here
More sources: Mechanics on Stackoverflow
Whoops, you’re right, I had my memory of the geometries mixed up.
There is this interesting video that suggests that JIS drivers (a Japanese standard) work pretty well for all cruciform heads.
Maybe. The opposite isn’t really true in my experience. Pozi drivers work well enough on JIS heads but Philips drivers slip way too easily. The bad thing is that JIS looks like Phillips heads which probably is part of the reason for Phillips rep of slipping out.
No, no they don’t. You mix up Philips and JIS, you WILL have a bad day.
Source: I’m an old toolmaker that has made some nice pocket change over the years drilling out stripped out JIS screws on motorcycle engines from owners that didn’t know the difference. A decent amount from repeat customers too…
Oh, I absolutely believe that a Philips driver would ruin just about any other type of screw, but I don’t think that’s what the video talks about—they suggest using JIS drivers with Philips screws. Have you also seen problems with that combination?
When I was a toolmaker, a large part of my day was often spent removing stripped fasteners that others had messed up. And yes, I have seen that done, JIS used in place of Philips. They do equal damage, equally as well, and equally as easily.
The largest problem with ANY fastener system is that users are too stupid, lazy, and cheap to: