OT: When is a Phillips screw not a Phillips screw? - Page 3 - Mercedes-Benz Forum
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post #21 of 25 (permalink) Old 08-13-2019, 08:47 PM
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Originally Posted by therling View Post
Just to turn the table, one time I used a chisel as a screwdriver.
Iv'e used a welder.
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post #22 of 25 (permalink) Old Yesterday, 04:24 AM
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I posted this on a Suzuki forum some years back:

Most newer Phillips screwdrivers and bits do not follow the Phillips standard closely and in fact are profiled more like the JIS spec, with one notable exception--the tip, which is too pointed tp properly engage a JIS screw head. Usually grinding or filing off a bit (no pun intended) of the tip can make them fit JIS screw quite nicely:



Here is a video (1.0 MB .wmv file) showing the improved fit (same two bits as shown above) in a JIS screw (you may have to save it to view it depending on your browser):

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post #23 of 25 (permalink) Old Yesterday, 12:59 PM Thread Starter
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Yes, I just took a couple of Phillips head screwdrivers and used my bench grinder to take off a bit of the tip. I took maybe 1mm off the tips. I noticed when putting a Phillips head screwdriver into a JIS screw, you can rock it back and forth more because the tip bottoms out before the side bits get a decent hold on the slots. My Kawasaki toolkit JIS screwdriver will not rock at a larger angle and my modified Phillips head drivers are now similar.

The JIS driver will work pretty well on a screw previously stripped using a Phillips if the screw doesn't need too much torque. Since the Phillips can't reach to the bottom of the slots, there is an unmolested bit of sidewall at the bottom that the Phillips couldn't reach.
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post #24 of 25 (permalink) Old Yesterday, 02:04 PM
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Some manufacturers make diamond coated Phillips and JIS bits that significantly reduce "camming out". I use them all the time on long deck screws--worth every penny in lost aggravation!

Here is one from Wera 110% top quality BTW:

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post #25 of 25 (permalink) Old Today, 03:06 AM
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Tip for phillips screw that wont grip , put a piece of emery paper over the screw and try again .Works well .
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