shimano rapidfires = JIS screws?

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profpointy
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Joined: 9 Jun 2011, 10:34pm

Re: shimano rapidfires = JIS screws?

Postby profpointy » 21 Jan 2021, 5:29pm

I (now) have a set of JIS screwdrivers, in "normal" sizes and "watchmakers'" sizes for cameras, but that said I replaced everything on the bike with allen screws.
If you munge the head it is possible to saw a slot in it and use a conventional flat blade screwdriver to get it off, and replace it with a new screw with a sensible head on it.

Jdsk
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Joined: 5 Mar 2019, 5:42pm

Re: shimano rapidfires = JIS screws?

Postby Jdsk » 21 Jan 2021, 5:30pm

LittleGreyCat wrote:Would the drivers be these, by any chance?
https://www.amazon.co.uk/Bessel-Vessel-Difference-Screwdrivers-No-220w-3/dp/B00E55DL4I/
I am noting that I should probably have a set of JIS drivers, but there are so many choices.

Details on that kit from Vessel:
https://www.vessel.co.jp/english/product/screwdriver/detail/233072

Jonathan

LittleGreyCat
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Joined: 7 Aug 2013, 8:31pm

Re: shimano rapidfires = JIS screws?

Postby LittleGreyCat » 21 Jan 2021, 5:41pm

MrP wrote:For background information, I discovered when recommissioning an old Honda, that JIS = Japanese Industrial Standard.
I could throw away all of my cross head drivers now I bought one of these Bessel JIS drivers with three different inserts.
They also do an impact screwdriver in #2 which is fantastic.
Won't use anything else on Japanese screws now.
Don't know if the above helps or not, regards


https://www.amazon.co.uk/Bessel-Vessel-Difference-Screwdrivers-No-220w-3/dp/B00E55DL4I/

Asked if these were the ones up thread.

MrP
Posts: 14
Joined: 12 Nov 2020, 7:23pm

Re: shimano rapidfires = JIS screws?

Postby MrP » 21 Jan 2021, 11:35pm

LittleGreyCat wrote:
MrP wrote:For background information, I discovered when recommissioning an old Honda, that JIS = Japanese Industrial Standard.
I could throw away all of my cross head drivers now I bought one of these Bessel JIS drivers with three different inserts.
They also do an impact screwdriver in #2 which is fantastic.
Won't use anything else on Japanese screws now.
Don't know if the above helps or not, regards


https://www.amazon.co.uk/Bessel-Vessel-Difference-Screwdrivers-No-220w-3/dp/B00E55DL4I/

Asked if these were the ones up thread.


Yes, that is the same screwdriver I bought. Wish I'd bought it decades ago.

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Sweep
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Joined: 20 Oct 2011, 4:57pm
Location: London

Re: shimano rapidfires = JIS screws?

Postby Sweep » 23 Jan 2021, 12:01pm

Reporting back.

I bought these.

https://www.ebay.co.uk/itm/Sealey-AK431 ... 2749.l2649

Excellent and great service/rapid delivery (PO 48 hours) from a Kent based supplier.

Maybe won't ever use the biggest one but the other 3 (2 point sizes) will get plenty of use I am sure.

I set to on the shifter I had issues with.

One screw I had already managed somehow to extract with a "normal" screwdriver, maybe because it wasn't too tight.

I actually managed to extract a second screw with these, even though that screw had doubtless been chewed a bit by me using the wrong screwdriver before.

No luck with the third screw which of course I had rashly decided to try to dremel into a slot-head and I can't even get that out at the mo with a slot-head screwdriver.

If only the brainwave about JIS had occured to me a bit earlier I could I am sure have easily extracted that screw as well and quite possibly resolved the jammed cable issue.

The screwdrivers also seemed to fit my shimano SPD pedals.

Being philosophical at least I won't be trashing any shifters or other stuff in future.

Recommended, many thanks for all the great advice and help as always.
Sweep

Brucey
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Joined: 4 Jan 2012, 6:25pm

Re: shimano rapidfires = JIS screws?

Postby Brucey » 23 Jan 2021, 12:09pm

worth drilling the head on the third screw?
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

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Sweep
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Joined: 20 Oct 2011, 4:57pm
Location: London

Re: shimano rapidfires = JIS screws?

Postby Sweep » 23 Jan 2021, 12:28pm

Brucey wrote:worth drilling the head on the third screw?


As the shifter is a quality item, the screw itself is a far beefier better thing than those securing the covers on 7 speed ones.

I think upthread there are suggestions on unscrewing it with a drill bit - will look into.

If I can get the bottom off without mucking up the top of the unit and the mech still works with the cable extracted I will of course at least have a functioning spare -I am assuming all the mechanics are all in the top?

i have already bought a second hand identical unit so stuff should swap.
Sweep

alexnharvey
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Joined: 10 Jan 2014, 8:39am

Re: shimano rapidfires = JIS screws?

Postby alexnharvey » 23 Jan 2021, 12:36pm

What is that white grease you sometimes find in shifters? I assume it must be plastic safe and might be good for lubricating the screws?

Jdsk
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Joined: 5 Mar 2019, 5:42pm

Re: shimano rapidfires = JIS screws?

Postby Jdsk » 23 Jan 2021, 12:59pm

White lithium grease?

Jonathan

alexnharvey
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Joined: 10 Jan 2014, 8:39am

Re: shimano rapidfires = JIS screws?

Postby alexnharvey » 23 Jan 2021, 3:49pm

Doesn't look like it to me, it has a more translucent quality.