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  1. #1
    Join Date
    Aug 2010
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    Default Vessel Impacta screw drivers

    I purchased a pair (JIS # 2 and JIS #3) Vessel Impacta screw drivers from Japan (on eBay) and they arrived yesterday. I've used them both yesterday and today on some very difficult, tight and rusted Philipshead and JIS screws.
    I found them really excellent quality, very hard tips and great not to have to go find and use the 'regular' impact driver - which I often find difficult to line up and find space to hit or whatever.
    These screwdrivers have the 'undo' function built in: you just use them as normal but when stuck, you hit the end with a hammer. The spiral cam inside will then turn the blade by 12deg per hit. So usually one or two hits is enough to loosen the screw, without changing tool.

    9802.gif 980_internals.jpg
    Cheers, Joe
    almost completely retired - more time to contemplate projects and spend more shed time....

  2. #2
    Join Date
    Sep 2008
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    Riddells Creek, Vic.
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    400

    Default

    They look good Joe, I have seen them mentioned on a few you tube videos lately, would you be able to post a link to the ebay site?

  3. #3
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    Aug 2010
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    Default

    Cheers, Joe
    almost completely retired - more time to contemplate projects and spend more shed time....

  4. #4
    Join Date
    Feb 2016
    Location
    NSW
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    113

    Default

    Would be good if they made a few for slotted heads. Or a 1/4" socket for impact driver bits.

  5. #5
    Join Date
    May 2010
    Location
    Pilbara
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    88

    Default

    Quote Originally Posted by Precious Mettle View Post
    Would be good if they made a few for slotted heads. Or a 1/4" socket for impact driver bits.
    if you click the ebay link provided in the previous post, you will see a number of straight blade options - but I failed to see an 1/4" driver socket offered.

  6. #6
    Join Date
    Feb 2016
    Location
    NSW
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    113

    Default

    Quote Originally Posted by desbromilow View Post
    if you click the ebay link provided in the previous post, you will see a number of straight blade options - but I failed to see an 1/4" driver socket offered.
    The straight blade ones are just regular screwdrivers. Vessel only makes 3 models of Impacta, and they're all JIS.

  7. #7
    Join Date
    Jul 2016
    Location
    Melbourne
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    29
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    337

    Default

    What applications do you commonly find JIS screws used in in Aus, just Japanese domestic market stuff?

  8. #8
    Join Date
    Feb 2016
    Location
    NSW
    Posts
    113

    Default

    Japanese auto mostly, but JIS will also drive Phillips just fine - Phillips will not drive JIS however.

  9. #9
    Join Date
    Aug 2010
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    Bendigo
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    Default

    All correct Precious
    I had a good look around the manufacturer's website - no other 'Impacta' screwdrivers made. None form other manufacturers' I can find either. Back to the 'ordinary' impact driver for flat screws and others.
    However, I learnt that you get long blades for the normal impact drivers. I'd be interested in a couple of those. And I DO have an adapter from 1/2" square to 1/4" hex - and have used that numerous times with long Philips Head blades (which stuff up JIS screws - i.e. ALL Japanese and many European motorcycle and now also car screws!!!) JIS seems to have become the standard outside the US for robot fitted and driven cross head screws. The US seems to prefer Posidriv -just add to the mix....
    When Philips Head screws were invented, the idea was self-alignment on manual air-driven screw drivers on production lines and a taper whith predictable cam-out profiles for the correct torque. Problem is that each cam-out wears the slope and requires more axial force to drive the screw to the correct torque, with eventual failure to tighten and loosen.
    JIS and Posidriv came about when screw drive tools could be torque controlled precisely and robots started fitting them. Then they did NOT want the driver to cam out, because the robots' servos would simply hold their position (push harder) and break the heads off. So the non-camming screws are controlled on torque and do not rely on fixed axial force.
    All very interesting - alas a nuisance. I now have Posidrive and JIS, and will slowly abandon my remaining Philips screwdrivers....
    The integrated
    Cheers, Joe
    almost completely retired - more time to contemplate projects and spend more shed time....

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