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Post by buster on Jun 15, 2023 20:04:31 GMT
a Teng impact driver has shifted any stubborn screws I'v come across, even got the stator off a cb450dx engine that had been stored very carefully under a hedge for years on end
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Deleted
Deleted Member
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Post by Deleted on Jun 15, 2023 20:32:32 GMT
Personally I'd use the hammer type impact driver with whatever best fitting crosspoint bit you have , if necessary grind a little off the tip to allow it to seat more fully . It's no consolation but I've always got screws out with the impact succesfully - eventually ! A club hammer and supporting the engine against a solid object might help , again you can be too gentle and use too small a hammer  .
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Post by alfie on Jun 15, 2023 20:48:36 GMT
Correct tool for the job...always JIS no3 T bar screwdriver ..laser tools JIS impact bits can be used in electric driver or with he blunt force driver. Never use Phillips bits as they are designed to turn out.....JIS bits are designed so that they do not turn out and that they can be tightened to a specific torque in the factory www.lasertools.co.uk/Product/7724/JIS-Impact-Bits-4pc |
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Post by paulpg36 on Jun 16, 2023 4:58:09 GMT
Correct tool for the job...always JIS no3 T bar screwdriver ..laser tools JIS impact bits can be used in electric driver or with he blunt force driver. Never use Phillips bits as they are designed to turn out.....JIS bits are designed so that they do not turn out and that they can be tightened to a specific torque in the factory www.lasertools.co.uk/Product/7724/JIS-Impact-Bits-4pcThose are the JIS bits I bought to use in the manual impact driver which would not shift the screws. They won't fit in a power impact driver. I think I will have to use a Philips but and flatten a bit as Bojer suggested. I am willing to risk ruining one screw if necessary although of course I don't want to as I would then have the challenge of removing it and sourcing some more screws. Can't understand why the correct JIS bits for an impact driver are not available in the UK. Am I the only mug who has tried to use a power impact driver to remove some JIS screws? |
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Post by paulpg36 on Jun 16, 2023 5:06:38 GMT
Personally I'd use the hammer type impact driver with whatever best fitting crosspoint bit you have , if necessary grind a little off the tip to allow it to seat more fully . It's no consolation but I've always got screws out with the impact succesfully - eventually ! A club hammer and supporting the engine against a solid object might help , again you can be too gentle and use too small a hammer .
Thanks. I'll give your solution a go and see what happens. I think I will need to source some new screws and hopefully they are available - John Oldfield in Southampton seems to have them in stock. |
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Post by paulpg36 on Jun 16, 2023 5:57:20 GMT
Success! I found hidden away a tin with some bits and connectors and adaptors. One fitted in the impact driver and I could attach a piece to it which accepted the JIS bit which I bought at the start of the week (sorry about the terminology as I haven't a clue what some of these things are called). It was a bit wobbly but pressing it hard into the screw, the driver took all the screws out easily apart from one. I think I mangled this one a bit whilst experimenting so I'll cut it off and get a new one which I might have and not know it! Amazing what is hidden away. No doubt there will be other challenges to come before I get this bike running again.
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