JIS is only good for being cheap, and only works if you’re a precision robot.
You lose the autocentering and overtorque protection of Phillips, without gaining any of the advantages of Torx.
(Phillips has overtorque protection in the sense that your tool doesn’t break, the screw does; which doesn’t matter if you don’t need to unscrew it.)
I thought the whole “JIS is different from Phillips” thing was a misunderstanding and JIS is just a type of Phillips or something and it and “regular” Phillips are more or less compatible
I have this iFixit guide as my source: https://www.ifixit.com/Guide/Choosing+the+Right+Screwdriver+Bit/93991#s176809
According to that, the JIS screws have orthogonal inner angles, while the Phillips’ are rounded, resulting in the slipping bits.
However, some Phillips screwdrivers fill out that space, and thus won’t fully go into a JIS screw, and effectively be too small, stripping it.
The last time this thread came up there were some convincing comments suggesting that the over torque protection for philips was not an intended feature.
JIS is only good for being cheap, and only works if you’re a precision robot. You lose the autocentering and overtorque protection of Phillips, without gaining any of the advantages of Torx. (Phillips has overtorque protection in the sense that your tool doesn’t break, the screw does; which doesn’t matter if you don’t need to unscrew it.)
I thought the whole “JIS is different from Phillips” thing was a misunderstanding and JIS is just a type of Phillips or something and it and “regular” Phillips are more or less compatible
Edit I found this: https://www.tekton.com/blog/jis-vs-phillips-screwdriver-tip-geometry-and-fastener-compatibility
I have this iFixit guide as my source: https://www.ifixit.com/Guide/Choosing+the+Right+Screwdriver+Bit/93991#s176809 According to that, the JIS screws have orthogonal inner angles, while the Phillips’ are rounded, resulting in the slipping bits. However, some Phillips screwdrivers fill out that space, and thus won’t fully go into a JIS screw, and effectively be too small, stripping it.
The last time this thread came up there were some convincing comments suggesting that the over torque protection for philips was not an intended feature.