Park does JIS, sort of...
09-17-17, 12:48 PM
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Did not know JIS was different from Phillips. That is why Shimano limit screws are so hard to turn. Anyway, the first thing I do on any Shimano derailleur is to replace the limit screws with 4mm allen head ones.
09-17-17, 01:59 PM
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After wrenching without the JIS screwdrivers for 40yrs I finally found out about these and bought some a few years ago. So much nicer to work with, they feel like they lock into Japanese and most any Asian screws and no more stripped or chewed up heads . So whatever they're calling this standard now I recommend them.
09-18-17, 09:53 AM
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I've always used a small flat-blade screwdriver for limit screws. Hate trying to use limit screws that have been garfed up by someone's use of a Philips. 
09-18-17, 10:17 AM
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Aren't most modern phillips screwdrivers actually JIS anyway? (Flat tipped)
I made a thread about this subject... years ago and I think that was mainly the consensus.
With that said, I often use flat screwdrivers on limit screws.
I made a thread about this subject... years ago and I think that was mainly the consensus.
With that said, I often use flat screwdrivers on limit screws.
09-18-17, 10:35 AM
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Phillips is not JIS.
A Phillips screwdriver will cam out (strip) the head of a JIS screw.
A Phillips screwdriver will cam out (strip) the head of a JIS screw.
09-18-17, 10:58 AM
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I use my Frearson drivers for this. As with JIS, Frearson headed screws are designed to reduce/eliminate camming out.
09-18-17, 11:15 AM
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09-18-17, 11:43 AM
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i have a custom ground small flat blade for adjusting limit/B screws.... and most limit screws incorporate a flat blade slot anyway.
Last edited by maddog34; 09-18-17 at 11:50 AM.
