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Cross-head screws - a caution:
Posted By: pacerr, 10-22-2010, 09:03 AM

Those screws that look like Phillips 00 and 000 in Japanese cameras and lenses? They aren't. They're JIS cross-heads and life's a lot simpler using JIS screw driver bits on 'em.

Whether you do this only once and run into trouble, or intend to do it often, it's worth your sanity to do it with the correct JIS tools so you don't risk stripping a screw head. T-shirts should be available for those that have been there, done that!

Sooner or later, you'll be sorry if you don't use the JIS bits since the Phillips bits make great roto-rooters in JIS screw heads because they don't fit all the way into the cross slots as you can see here:



If gentle torque with a common Phillips jeweler-type bit doesn't work, as a poor substitute, you might try filing a suitable flat-blade bit to the correct angle before you completely strip the JIS head.

[ Search "JIS screw drivers" on the net for sources. Generally less than $20 for a set of all four sizes. ]

H2

Last edited by pacerr; 10-22-2010 at 12:02 PM.
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01-30-2018, 06:56 PM - 2 Likes   #16
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QuoteOriginally posted by blackcloudbrew Quote
thanks for the heads up.
nice to see you didn't screw around and you chose not to make a joke about this subject

07-15-2020, 01:04 AM - 1 Like   #17
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Search for Vessel 9902 on ebay:
Great offers from Japan with cheap shipping costs.

JIS 0 and 00 included, both work perfect on all Pentax cameras
07-15-2020, 02:10 AM   #18
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QuoteOriginally posted by marcusBMG Quote
Sources of JIS are thin on the ground in UK. Trawling the web one can find eg sources of Moody products but then postage can be way OTT.

FYI I obtained two small sizes of JIS blade from Micro Tools Europe
Micro-Tools Europe Tools | Miniature Tools for Camera and Watch Repair
and Starret jeweller's screwdrivers off ebay to use them in.
JIS Driver Set ? iFixit Store UK
I bought mine from here - they didn't take too long to arrive either.
07-15-2020, 01:41 PM   #19
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QuoteOriginally posted by Benz3ne Quote
JIS Driver Set ? iFixit Store UK
I bought mine from here - they didn't take too long to arrive either.
Not the same quality as the Vessel from Japan!
The tip of those is none hardened and they can rust (see attachment)


If Moody, then get those which have hardened tips as do the Vessel from Japan!
I prefer the longer Vessels, particular when having to unscrew the solenoid of a Pentax or the batteryhook, their length is much easier for such critical regions!



Similar like a cheap camera compared to a good one!

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07-15-2020, 10:50 PM   #20
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QuoteOriginally posted by photogem Quote
Not the same quality as the Vessel from Japan!
The tip of those is none hardened and they can rust (see attachment)


If Moody, then get those which have hardened tips as do the Vessel from Japan!
I prefer the longer Vessels, particular when having to unscrew the solenoid of a Pentax or the batteryhook, their length is much easier for such critical regions!



Similar like a cheap camera compared to a good one!
Interestingly, mine have a long, fully black shaft and tip (euphemism unintended).
I'll have to look at the Vessel branded ones you've mentioned, not that I use mine often.
07-20-2020, 10:49 PM   #21
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It's not about how often one uses them but to buy the best ones suited to the work in demand.
If one has to exchange the solenoid in a Pentax K-30, K-50, K-500, K-S1, K-S2 or K-70

and....
if one has to disassemble an older defunct Pentaxbody for a Japan-made solenoid, then one will have much more difficulties with any of those
Moody-JIS screwdrivers because they are very short:



I had high quality (but similar short) made in Germany screw-drivers until I found those Vessels.

The angle to reach to the solenoid is too steep with such short ones because the grip is then in the way.

Same goes for this difficult to reach screw of the battery-hook:
11-04-2020, 09:54 PM - 1 Like   #22
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QuoteOriginally posted by photogem Quote
Search for Vessel 9902 on ebay:
Great offers from Japan with cheap shipping costs.

JIS 0 and 00 included, both work perfect on all Pentax cameras
Good call, I bought the vessel 9902 kit from amazon and was worried for a moment as the packaging didn't explicitly say JIS but so far so good! The long length is great even for just lenses when some screws are in tight spaces and screwdriver bits are just too big. My vessel drivers needed to be magnetized though, I use a strong magnet to 'charge' them up before working.
11-05-2020, 01:41 AM   #23
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Typically Jeweler hardware supply stores still sell hardened vanadium steel* JIS screwdrivers and pricier versions typically have long shafts that are well suited for camera repair.

* unfortunately due to the delicate nature of watch making jelwelers tools are by design resilient to any attempt to magnetize them. This can make working with small screws problematic.

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